Ultra Sound game
-
Upload
parag-manohar-patil -
Category
Documents
-
view
221 -
download
0
Transcript of Ultra Sound game
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 130
In New Food Engineering Research Trends ISBN 978-1-60021-897-2
Editor an $rwaeamp 10(-1() 2008 No+a Science ishersamp Inc
Chapter 3
ULTRASOUND IN FRUIT PROCESSING
Sueli Rodrigues 1
and Fabiano AN Fernandes 2
1$ni+ersidade Federa do earaamp eartaento de Tecnoogia dos ientosamp
as do iciamp Boco 8)8amp aia osta 12168amp 60))-760 Fortae3a 4 Eamp BR5I2$ni+ersidade Federa do earaamp eartaento de Engenharia iicaamp
as do iciamp Boco 709amp 60))-760 Fortae3a 4 Eamp BR5I
ABSTRACT
ower trasond has een sccess eoed in the cheica indstramp oer
and astic indstr or an ears and its se has een growing in the ood indstrower trasond can rodce cheicaamp echanica or hsica eects on the rocessesor rodcts where it is aied Taing ad+antage o one o the eects or their
coinationamp ower trasond has een sed in the ood indstr in dringampree3ingamp etraction rocesses and en3e inacti+ation The se o trasond inaient ids iswe nown to case a ner o hsica eects trenceamp artice aggoerationampicrostreaing and ioogica ce rtre as we as cheica eects ree radicaoration These eects arise ain ro the henoenon nown as ca+itation
lterein a rie re+iew o the se o trasond in the ood indstr is resented andthe ain aications are discssed corehensi+e discssion on the eects o
trasond in the tisse strctre o rits is resented aong with hotoicrograhs o eons sitted to trasond
detaied discssion is resented concerning the se o trasonic wa+es in dringampwhere an trasonic re-treatent can e sed rior to air-dring The ethods in+o+edin the trasonic re-treatent are resented aong with the rests otained or se+erarits sch as eonsamp ananasamp ineaesamp aaas and other =atheatica odes thatcan e sed to siate the rocess are resented gttii3ation o the dring rocess isaso discssed or trasonic re-treatent and trasond-assisted osotic dehdration
Keywords $trasondamp Fritamp ringamp gtsotic dehdrationamp Etraction
Sei Rodriges
hone ))-8)-((6696)6amp E-ai seicr
Faiano N Fernandes
hone ))-8)-((669611amp E-ai aianoetechengr
10
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 230
Sei Rodriges and Faiano N Fernandes
1 INTRODUCTION
The se o trasond within the ood indstr has een growing or an ears $ to
ew ears ago ost aications o trasond in the ood indstr were reated to
non- in+asi+e onitoring o the rocess or ood Aait In recent earsamp an
aications o trasonic energ ha+e een in+estigated concerning the se o trasond
to direct aect the rocess or rodct
irtaamp ower trasond is sccess eoed to cheica indstramp oer
indstramp astic wedingamp etc ower trasond can rodce cheicaamp echanica or
hsica eects on the rocesses or rodcts where it is aied =asonamp 1998
Taing ad+antage o one o the eects or their coinationamp ower trasond has
een sed to iro+e ceaning o sraceamp catase cheica reactionamp enhance dring
and itrationamp and acceerate the etraction o searation rocess thogh the
eneits ro the se o trasond in the ood indstr ha+e attracted ore and ore
attention in recent earsamp aication o trasond to direct iro+e rocesses and rodcts is ess oar in ood anactring than in other indstries
The sond ranges eoed in the ood indstr can e di+ided into high and
ow reAenc ltigh reAenc trasond in the =lt3 range has ow energ and is sed
ain in onitoring ood Aait ow reAenc trasond in the lt3 range has high
energ and can
e sed in ood rocessingamp and is oten caed ow reAenc ower trasond ltigh
intensit trasond ses ower in the range o 10-1000 CDc2
and can case
hsica disrtion o the ateria to which it is aied =asonamp 1998
Chen ow reAenc ower trasond is eoedamp the trasonic wa+es tra+e throgh
the soid edi casing a raid series o aternati+e coressions and eansionsamp in
a siiar wa to a songe when it is sAee3ed and reeased reeated songe eect
Fente- Banco et aamp 2006 In iAid edi the sonication cases ca+itation which
consists in the oration o es in the iAidamp which can eosi+e coase and
generate ocai3ed ressre Can et aamp 1992 Sia et aamp 1998 The rate o
ca+itation or aternate coressions and eansions deends on the trasond
reAenc Etree hsica henoena 1000 and )00=a at icro-scae tae
ace when the es coase
Ssicamp 1988 The stae ca+itating es interact with the acostic ied
generating strong icro-streaing and high shear a+itation stdies ha+e een restricted tothe areas o heat transortamp iAid tensie strengthamp and serheating and oiing henoena
eamp 1981 Rooneamp 1981
The aication o ower trasond in ood en3e inacti+ation has een eored in
recent ears and was reorted Ra+ianamp 5hang and Feng 200) as a too or inacti+ation o
toato ectinethestearase $trasonication in coination with other treatents is ore
eecti+e in enhancing the inacti+ation eicac gtrdoGe3amp San3amp lternHnde3amp and e3-
oren3o198 eored the eect o coining heat with ower trasond
therosonication and ond that the icroia inacti+ation o therosonication was greater
than the s o the inacti+ating eects o heat and trasond when acting indeendent e
Jennaroamp aa+eaamp Roanoamp and =asi 1999 aso sed therosonication as a eans
or eroidase inacti+ation The concet o coination treatent has een rther eored
introdcing ee+ated static ressre in an trasond treatent chaer in a rocess
caed anotherosonication =anotherosonication has een sed to deacti+ate
iogenase
$trasond in Frit rocessing 10)
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 330
e3 and Brgosamp 199)aamp eroidase e3 and Brgosamp 199)amp iase and rotease
ercetamp e3amp and Brgosamp 1997amp and toato or orange ectinethestearase dioeamp
2002 e3amp ercetamp SHnche3amp and Brgosamp 1998 ercetamp e3amp and Brgosamp 1999 ercetamp
SHnche3amp Brgosamp =ontanesamp and e3-Besaamp 2002amp a with an increased inacti+ation For
eaeamp e3 et a 1998 reorted that the D-+aes o toato ectinethestearase at
62)o were redced )(-odamp ro ) in in thera treatents to 08) in
anotherosonication The inacti+ation eect o trasond is attritae ain to theca+itation rooted the sonication
Ra+iaanamp 5hang and Feng 200) carried ot trasonic inacti+ation tests with
toato ectinethesterase at )0amp 61amp and 72o Thera on tests at )0amp 61amp and 72
o
were aso condcted to deineate ossie additi+e or snergistic eects In thera
inacti+ation testsamp the redction in ectinethestearase resida acti+it at )0o was
negigie whie D-+aes
at 61 and 72o were 2990 and 2)( in D-+aes +aried ro 20 to 206 in in
sonication tests t were redced to 0(in in the therosonication test at 72o oared to
the en3e inacti+ation test at 61oamp therosonication at the sae teeratre increased the
inacti+ation (9 to (7-odamp whie at 72o the increase was (648-odamp deending on
ca+itation intensit The athors reosted a strong snergistic eect in the therosonication
tests The increase in the inacti+ation was ore rononced at ow teeratres
Sonication can aso e sed to destro icroorganiss in oods =an athors
ha+e reorted that ca+itation cased sonication is resonsie or disersion o
cs o icroorganissamp odiication o the cear acti+itamp nctring o the ce
wa and increasing sensiti+it to heat ltowe+eramp the etha eect o trasond is not the
sae or a icroorganiss Jenera the trasond treatent is not ch eecti+e
on sa rond ces ingeramp 197) For eaeamp Jra-ositi+e acteriaamp sch as
Staphylococcus aureus and enterococci gtrdone3amp San3amp lternande3 and oe3-oren3oamp198 are Aite resistant to trasond aication Bacteria sores are e+en ore resistant
hed and Rsseamp 197) Bocher and echowichamp 1979 The coined eect o
trasonic wa+es and heat treatent aied sitaneos aears to e +er eecti+e
iccoiniamp Taiandieramp Ciheamp eas and Strehaianoamp 1997 and e+en ore eecti+e
coining heat and trasond nder ressre
Rasoamp ondon and Saa Treatamp 199 The sae coination o eects has een
deonstrated to ha+e a Aite eecti+e deacti+ating action on +arios en3es o interest in
ood technoog e3 et aamp 199 e3 and Brgosamp 199)a thogh the ossiiit o
deacti+ating en3es or destroing icroorganiss trasond wa+esamp aone or in
coination with other hsica treatentsamp has een wide sed or aorator aications
in icroioogamp inoog and en3oogamp the sae is not tre or indstria
aications
e Jennaroamp aa+eaamp Roano and =asi 1999 stdied the eect o sonication
on eroidase inacti+ation The coined eect o high ower trasond and teeratre
on the acti+it o eroidase te I ro horseradish ssended in water was stdied The
tests were erored at 80K sing ower trasonds ha+ing reAencies o 20amp 0amp and 60
lt3 $trasonic owers +aried in the range ro 0 to 120 C oined treatents were
carried ot sing a aorator scae ant oerating in continos and in atch
ode In continos eerientsamp 6 o ssension was circated in the ant ha+ing asanitation chaer o 20 In the other caseamp two sets o eerients were carried
ot sing a sanitation chaer o 100 treating 0 or 80 o ssensionsamp
resecti+e It was ond that the decia redction tie o eroidase at 80Kamp 80amp
redces ro 6) to 10 in ca
106
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 430
Sei Rodriges and Faiano N Fernandes
when trasonds are aied In articaramp 80 +aries with trasonic oweramp sonotrode
geoetr and +oe o ssensions sitted to the treatent
Free3ing is an eceent ethod or ong reser+ation o ood rodcts and has
gained widesread attention Jenera seaingamp ree3ing reser+ation ro+ides ood
rodcts with etter tasteamp tetre and ntritiona +ae than an other reser+ation ethods
In recent earsamp increased ownershi o doestic ree3ers and icrowa+e o+ens has oostedraid increases in saes o ro3en ood Feowsamp 2000 rrent chaenges ie on rodction
eicienc and high rodct Aait ltowe+eramp the drawac o the resence o arge ice
crstas within the ood which rests in redction in eating Aait inherent eists and has
staed the de+eoent
o ree3ing reser+ation =ore and ore research Bstaadamp 1999 =artinoamp gtteroamp San3amp and
5arit3amp 1998 Ngaoamp Baareamp Renodsamp and =awsonamp 1999 aniested that the Aait o
ro3en ood is cose reated to the si3e and ocation o ice crstas oredamp which in trn
arge deends on the rate o ree3ing and ina teeratre in ree3ing rocess The ree3ing
rate go+erns the oration o ice crstas within ro3en rodcts Raid ree3ing
rodces sa intracear ice crstasamp whie sow ree3ing ors arge ice crstas arge
ice crstas wod case daages to ood Aait incding aearanceamp sensor
roertiesamp teta attrites and ntritiona +ae Frtheroreamp the cear strctre o
ioogica originated oodsts wod e rtred with the rest o dri oss on thawing
Etensi+e research has een carried ot to redce the si3e o ice crstas on ro3en rodcts
This can e achie+ed +er high ree3ing rateamp oring sa and e+en ice crstas
throghot the oodsts For this roseamp ree3ing ethods caae o ensring ro3en
ood o the ai ina Aait ha+e een de+eoed ir ree3ingamp contact ree3ingamp
iersion ree3ingamp crogenic ree3ing and their coinations are the ost coon
ethods sed in ree3ing indstr to otain oti ree3ing rate or ood rodcts New ethods are eing roosed and de+eoed ain in aorator scaeamp eg the
high-ressre-assisted ree3ing aiche+samp norramp and iordamp 199) gtteroamp =artinoamp
5arit3amp Soasamp and San3amp 2000 San3amp aaciosamp oe3amp and gtrdone3amp 198)amp or
dehdroree3ing Sia33iamp Raggioamp Bignoneamp and =ascheroniamp 1998
ccording to i and Sn 2002 ower trasond has ro+ed to e se in controing
crstaisation rocess It as eecti+e roes in the initiation o ncei and sseAent crsta
growth $nder the inence o ower trasondamp ch ore raid and e+en
nceation occrs In ree3ingamp this wod ead to ine ice crstas and shortening the tie
etween the onset o crstaisation and the coete oration o iceamp ths redcing
daages to cear strctre This a e ost de to acostic ca+itationamp which
consists o the orationamp growth and +ioent coase o sa es or +oids in iAids
Siaamp Beneitoamp Sanche3amp and Rosseoamp 1998 The ca+itation es can act as ncei
or crsta growthamp andDor the ncei aread resent wod e ragented into saer
ones cased the strong orces originating ro the coase o ca+itation es
=asonamp 1998 Frtheroreamp other stdies
ia and Sastramp 1990 Sastramp Shenamp and Baisdeamp 1989 ha+e shown that trasond wod
eecti+e iro+e con+ecti+e heat transer coeicient Enhancing the heat
transer coeicient etween the ood rodcts eing ro3en and the rerigerating edi is
one o the ost se easres or raid reo+a sensie heat and atent heat o sion so as to intensi the ree3ing rocess ower trasond is roising to e aied in
ree3ing with its direct eects on heat transer and crstai3ation rocess
i and Sn 2002 stdied the eect o ower trasond on ree3ing rate o otatoes The
eect o ower trasond on ree3ing rate was inenced trasond oweramp
eosre tie and the ree3ing hase to which trasond was aied ltowe+eramp the trasond
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 530
ower
$trasond in Frit rocessing 107
and eosre tie shod e chosen with the consideration o thera eect o trasond In
this stdamp the ree3ing rate was iro+ed great when trasond 1)8) C was aied or
2 in Chen trasond was aied to the hase change eriod dring ree3ing rocessamp the
ree3ing rate was increased signiicant
The echanica and hsica eects o sond can e sed to enhance an
rocesses where ass transer taes ace Thsamp this echanis can e o great ree+ance
to dringamp dewatering and etraction rocesses $trasond aication a aso change the
+iscositamp srace tension and deor oros soid aterias Taretonamp 1992
2 EFFECT OF ULTRASOUND IN THE FRUIT TISSUE
The eect o trasond aication on the cear strctre can e stdied
ight icrosco anasis To show the eect o trasond o+er the cear strctreand the changes that occr with tie wi e shown and coared with the eects
rodced osotic dehdration other oar re-treatent
Li i$ros$oi$ Aamp(ysis
t the end the re-treatent a ce sae has to e care ct 000) a+erage side
The sae ces are ied with L sotion o araoradehde in 01= hoshate eramp
lt 72 and 1L gtaradehde or 2h at aient teeratre arno+isamp 196) The
ateria is then dehdrated in a graded ethano series ro 10L to 100L and eedded in
ltistoresin eedding it Mng
To reare the ainas the tisse ocs shod e sectioned at ) to 10 on a
icrotoe Sectioning the ocs at ) a rest in section too thin that a e diict
to see nder the icroscoe Sectioning the ocs at a thicness o+er 10 can rest in
serosition o ces
ltistocheica reaction can e carried ot with Toidine Be TB at lt 0 as
etachroatic stain to detect oanionic ectins ida 1977
The hotoicrograhs o the ce strctre shown herein are or eons sitted
to trasond and osotic dehdration and were taen sing an gts BO)1
ight icroscoe with digita iage catre sste and the ocs were sectioned at 8
E))e$ o) U(rsoampd iamp Fri Tisse
The icroscoic iage anasis o resh eon showed tica thin-waed ces
with nora orhoog and soe intercear saces igre 1 er ew ces had
ndated was
108
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 630
Figre 1 hotoicrograhs o eon ces eore rocessing raw rit =agniication o (80
t the end o the trasonic re-treatent itte change was oser+ed in the rit oistre
content when sitted to trasond in a distied water ath The rit incororated water
ater 20 intes sitted to trasond increasing 87L its water content =icroscoic
iage anasis showed two distinct regionsamp one region where the ces ecae oated as a
rest o water gain igre 2 and a second region where the ces ecae ch saer and
neede shaed igre 2B
Figre 2 hotoicrograhs o eon ces ater 20 intes o trasond re-treatent Region with
oated ces and B Region with icroscoic channes =agniication o (80
Figre 2B shows that icroscoic channes are ored the eongation and attening
o ces in soe regions o the sae These neede shaed ces were not oser+ed in the
resh rit and were oser+ed in a saes sitted to trasonic re-treatent Soe
$trasond in Frit rocessing 109
researchers ha+e reorted that trasonic wa+es a create icroscoic channes Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
Bancoamp and Jaego-MHre3amp 2006amp t did not show an icroscoic iage
ter (0 intes o trasonic treatent the icroscoic channes ecae roader
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 730
igre (B and soe new saer icroscoic channes aeared The region with oated
ces was sti oser+ed igre ( The roadening o the icroscoic channes eain the
rther increase in the eecti+e water disi+it o the rit oser+ed dring air-
dring rocess and the increase in the eecti+e disi+it o igents and soe soids
oser+ed in etraction rocesses There is no indication o oss o strength o the ce
wa and dring nie ctting the ces at the order did not ai nder stress as
haens when the rit is sitted to osotic dehdration No ce readown was
oser+ed in the saes sittedto ow reAenc trasond
Figre ( hotoicrograhs o eon ces ater (0 intes o trasond re-treatent Region with oated ces and B Region with icroscoic channes =agniication o (80
The eecti+e disi+it in rits is deendent on tisse strctre and on the rit
orosit The ce was act as a sei-ereae erane inerring in a resistance to
dision o water and soids n increase in orosit increases the +oid sace or water todise and decreases resistance or dision The se o trasond increased the eecti+e
water disi+it o eonsamp ananas and saota dring the air-dring rocess redcing
the tie reAired or dringamp coniring the oser+ations o Fente-Banco et a 2006 that
the trasonic re-treatent aects the rit tisse aing easier or the water to dise
dring air-dring and showed that the icroscoic channes a contrite with the higher
eecti+e
water disi+it
gtther re-treatent sed in dring is the osotic dehdrationamp which resents a
coete dierent eect o+er the rit tisse ter (0 intes nder osotic
treatent se+era dierences are oser+ed in the ce strctre de to the high water
oss ring osotic dehdration the ce was ecoe distorted and saer throghot o
the saes In soe regions the Pnctions etween adPacent ces are sti resent
t with redced intercear saces igre whie in other regions disrtion o
the ces are oser+ed casing an increase o intercear saces which occr de to
the soii3ing o cheator- soe ectin o the idde aea igre B
rin3i+ai et aamp 2006 heator-soe ectin is the sstance that ost contrites to
ce adhesion and irness and according to the icroscoic iages the cheator-soe
ectin artia soii3e at the ear stages o
110Sei Rodriges and Faiano N Fernandes
osotic dehdration ring trasond aicationamp no increase o intercear saces was
oser+ed or has een reorted in the iteratre
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 230
Sei Rodriges and Faiano N Fernandes
1 INTRODUCTION
The se o trasond within the ood indstr has een growing or an ears $ to
ew ears ago ost aications o trasond in the ood indstr were reated to
non- in+asi+e onitoring o the rocess or ood Aait In recent earsamp an
aications o trasonic energ ha+e een in+estigated concerning the se o trasond
to direct aect the rocess or rodct
irtaamp ower trasond is sccess eoed to cheica indstramp oer
indstramp astic wedingamp etc ower trasond can rodce cheicaamp echanica or
hsica eects on the rocesses or rodcts where it is aied =asonamp 1998
Taing ad+antage o one o the eects or their coinationamp ower trasond has
een sed to iro+e ceaning o sraceamp catase cheica reactionamp enhance dring
and itrationamp and acceerate the etraction o searation rocess thogh the
eneits ro the se o trasond in the ood indstr ha+e attracted ore and ore
attention in recent earsamp aication o trasond to direct iro+e rocesses and rodcts is ess oar in ood anactring than in other indstries
The sond ranges eoed in the ood indstr can e di+ided into high and
ow reAenc ltigh reAenc trasond in the =lt3 range has ow energ and is sed
ain in onitoring ood Aait ow reAenc trasond in the lt3 range has high
energ and can
e sed in ood rocessingamp and is oten caed ow reAenc ower trasond ltigh
intensit trasond ses ower in the range o 10-1000 CDc2
and can case
hsica disrtion o the ateria to which it is aied =asonamp 1998
Chen ow reAenc ower trasond is eoedamp the trasonic wa+es tra+e throgh
the soid edi casing a raid series o aternati+e coressions and eansionsamp in
a siiar wa to a songe when it is sAee3ed and reeased reeated songe eect
Fente- Banco et aamp 2006 In iAid edi the sonication cases ca+itation which
consists in the oration o es in the iAidamp which can eosi+e coase and
generate ocai3ed ressre Can et aamp 1992 Sia et aamp 1998 The rate o
ca+itation or aternate coressions and eansions deends on the trasond
reAenc Etree hsica henoena 1000 and )00=a at icro-scae tae
ace when the es coase
Ssicamp 1988 The stae ca+itating es interact with the acostic ied
generating strong icro-streaing and high shear a+itation stdies ha+e een restricted tothe areas o heat transortamp iAid tensie strengthamp and serheating and oiing henoena
eamp 1981 Rooneamp 1981
The aication o ower trasond in ood en3e inacti+ation has een eored in
recent ears and was reorted Ra+ianamp 5hang and Feng 200) as a too or inacti+ation o
toato ectinethestearase $trasonication in coination with other treatents is ore
eecti+e in enhancing the inacti+ation eicac gtrdoGe3amp San3amp lternHnde3amp and e3-
oren3o198 eored the eect o coining heat with ower trasond
therosonication and ond that the icroia inacti+ation o therosonication was greater
than the s o the inacti+ating eects o heat and trasond when acting indeendent e
Jennaroamp aa+eaamp Roanoamp and =asi 1999 aso sed therosonication as a eans
or eroidase inacti+ation The concet o coination treatent has een rther eored
introdcing ee+ated static ressre in an trasond treatent chaer in a rocess
caed anotherosonication =anotherosonication has een sed to deacti+ate
iogenase
$trasond in Frit rocessing 10)
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 330
e3 and Brgosamp 199)aamp eroidase e3 and Brgosamp 199)amp iase and rotease
ercetamp e3amp and Brgosamp 1997amp and toato or orange ectinethestearase dioeamp
2002 e3amp ercetamp SHnche3amp and Brgosamp 1998 ercetamp e3amp and Brgosamp 1999 ercetamp
SHnche3amp Brgosamp =ontanesamp and e3-Besaamp 2002amp a with an increased inacti+ation For
eaeamp e3 et a 1998 reorted that the D-+aes o toato ectinethestearase at
62)o were redced )(-odamp ro ) in in thera treatents to 08) in
anotherosonication The inacti+ation eect o trasond is attritae ain to theca+itation rooted the sonication
Ra+iaanamp 5hang and Feng 200) carried ot trasonic inacti+ation tests with
toato ectinethesterase at )0amp 61amp and 72o Thera on tests at )0amp 61amp and 72
o
were aso condcted to deineate ossie additi+e or snergistic eects In thera
inacti+ation testsamp the redction in ectinethestearase resida acti+it at )0o was
negigie whie D-+aes
at 61 and 72o were 2990 and 2)( in D-+aes +aried ro 20 to 206 in in
sonication tests t were redced to 0(in in the therosonication test at 72o oared to
the en3e inacti+ation test at 61oamp therosonication at the sae teeratre increased the
inacti+ation (9 to (7-odamp whie at 72o the increase was (648-odamp deending on
ca+itation intensit The athors reosted a strong snergistic eect in the therosonication
tests The increase in the inacti+ation was ore rononced at ow teeratres
Sonication can aso e sed to destro icroorganiss in oods =an athors
ha+e reorted that ca+itation cased sonication is resonsie or disersion o
cs o icroorganissamp odiication o the cear acti+itamp nctring o the ce
wa and increasing sensiti+it to heat ltowe+eramp the etha eect o trasond is not the
sae or a icroorganiss Jenera the trasond treatent is not ch eecti+e
on sa rond ces ingeramp 197) For eaeamp Jra-ositi+e acteriaamp sch as
Staphylococcus aureus and enterococci gtrdone3amp San3amp lternande3 and oe3-oren3oamp198 are Aite resistant to trasond aication Bacteria sores are e+en ore resistant
hed and Rsseamp 197) Bocher and echowichamp 1979 The coined eect o
trasonic wa+es and heat treatent aied sitaneos aears to e +er eecti+e
iccoiniamp Taiandieramp Ciheamp eas and Strehaianoamp 1997 and e+en ore eecti+e
coining heat and trasond nder ressre
Rasoamp ondon and Saa Treatamp 199 The sae coination o eects has een
deonstrated to ha+e a Aite eecti+e deacti+ating action on +arios en3es o interest in
ood technoog e3 et aamp 199 e3 and Brgosamp 199)a thogh the ossiiit o
deacti+ating en3es or destroing icroorganiss trasond wa+esamp aone or in
coination with other hsica treatentsamp has een wide sed or aorator aications
in icroioogamp inoog and en3oogamp the sae is not tre or indstria
aications
e Jennaroamp aa+eaamp Roano and =asi 1999 stdied the eect o sonication
on eroidase inacti+ation The coined eect o high ower trasond and teeratre
on the acti+it o eroidase te I ro horseradish ssended in water was stdied The
tests were erored at 80K sing ower trasonds ha+ing reAencies o 20amp 0amp and 60
lt3 $trasonic owers +aried in the range ro 0 to 120 C oined treatents were
carried ot sing a aorator scae ant oerating in continos and in atch
ode In continos eerientsamp 6 o ssension was circated in the ant ha+ing asanitation chaer o 20 In the other caseamp two sets o eerients were carried
ot sing a sanitation chaer o 100 treating 0 or 80 o ssensionsamp
resecti+e It was ond that the decia redction tie o eroidase at 80Kamp 80amp
redces ro 6) to 10 in ca
106
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 430
Sei Rodriges and Faiano N Fernandes
when trasonds are aied In articaramp 80 +aries with trasonic oweramp sonotrode
geoetr and +oe o ssensions sitted to the treatent
Free3ing is an eceent ethod or ong reser+ation o ood rodcts and has
gained widesread attention Jenera seaingamp ree3ing reser+ation ro+ides ood
rodcts with etter tasteamp tetre and ntritiona +ae than an other reser+ation ethods
In recent earsamp increased ownershi o doestic ree3ers and icrowa+e o+ens has oostedraid increases in saes o ro3en ood Feowsamp 2000 rrent chaenges ie on rodction
eicienc and high rodct Aait ltowe+eramp the drawac o the resence o arge ice
crstas within the ood which rests in redction in eating Aait inherent eists and has
staed the de+eoent
o ree3ing reser+ation =ore and ore research Bstaadamp 1999 =artinoamp gtteroamp San3amp and
5arit3amp 1998 Ngaoamp Baareamp Renodsamp and =awsonamp 1999 aniested that the Aait o
ro3en ood is cose reated to the si3e and ocation o ice crstas oredamp which in trn
arge deends on the rate o ree3ing and ina teeratre in ree3ing rocess The ree3ing
rate go+erns the oration o ice crstas within ro3en rodcts Raid ree3ing
rodces sa intracear ice crstasamp whie sow ree3ing ors arge ice crstas arge
ice crstas wod case daages to ood Aait incding aearanceamp sensor
roertiesamp teta attrites and ntritiona +ae Frtheroreamp the cear strctre o
ioogica originated oodsts wod e rtred with the rest o dri oss on thawing
Etensi+e research has een carried ot to redce the si3e o ice crstas on ro3en rodcts
This can e achie+ed +er high ree3ing rateamp oring sa and e+en ice crstas
throghot the oodsts For this roseamp ree3ing ethods caae o ensring ro3en
ood o the ai ina Aait ha+e een de+eoed ir ree3ingamp contact ree3ingamp
iersion ree3ingamp crogenic ree3ing and their coinations are the ost coon
ethods sed in ree3ing indstr to otain oti ree3ing rate or ood rodcts New ethods are eing roosed and de+eoed ain in aorator scaeamp eg the
high-ressre-assisted ree3ing aiche+samp norramp and iordamp 199) gtteroamp =artinoamp
5arit3amp Soasamp and San3amp 2000 San3amp aaciosamp oe3amp and gtrdone3amp 198)amp or
dehdroree3ing Sia33iamp Raggioamp Bignoneamp and =ascheroniamp 1998
ccording to i and Sn 2002 ower trasond has ro+ed to e se in controing
crstaisation rocess It as eecti+e roes in the initiation o ncei and sseAent crsta
growth $nder the inence o ower trasondamp ch ore raid and e+en
nceation occrs In ree3ingamp this wod ead to ine ice crstas and shortening the tie
etween the onset o crstaisation and the coete oration o iceamp ths redcing
daages to cear strctre This a e ost de to acostic ca+itationamp which
consists o the orationamp growth and +ioent coase o sa es or +oids in iAids
Siaamp Beneitoamp Sanche3amp and Rosseoamp 1998 The ca+itation es can act as ncei
or crsta growthamp andDor the ncei aread resent wod e ragented into saer
ones cased the strong orces originating ro the coase o ca+itation es
=asonamp 1998 Frtheroreamp other stdies
ia and Sastramp 1990 Sastramp Shenamp and Baisdeamp 1989 ha+e shown that trasond wod
eecti+e iro+e con+ecti+e heat transer coeicient Enhancing the heat
transer coeicient etween the ood rodcts eing ro3en and the rerigerating edi is
one o the ost se easres or raid reo+a sensie heat and atent heat o sion so as to intensi the ree3ing rocess ower trasond is roising to e aied in
ree3ing with its direct eects on heat transer and crstai3ation rocess
i and Sn 2002 stdied the eect o ower trasond on ree3ing rate o otatoes The
eect o ower trasond on ree3ing rate was inenced trasond oweramp
eosre tie and the ree3ing hase to which trasond was aied ltowe+eramp the trasond
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 530
ower
$trasond in Frit rocessing 107
and eosre tie shod e chosen with the consideration o thera eect o trasond In
this stdamp the ree3ing rate was iro+ed great when trasond 1)8) C was aied or
2 in Chen trasond was aied to the hase change eriod dring ree3ing rocessamp the
ree3ing rate was increased signiicant
The echanica and hsica eects o sond can e sed to enhance an
rocesses where ass transer taes ace Thsamp this echanis can e o great ree+ance
to dringamp dewatering and etraction rocesses $trasond aication a aso change the
+iscositamp srace tension and deor oros soid aterias Taretonamp 1992
2 EFFECT OF ULTRASOUND IN THE FRUIT TISSUE
The eect o trasond aication on the cear strctre can e stdied
ight icrosco anasis To show the eect o trasond o+er the cear strctreand the changes that occr with tie wi e shown and coared with the eects
rodced osotic dehdration other oar re-treatent
Li i$ros$oi$ Aamp(ysis
t the end the re-treatent a ce sae has to e care ct 000) a+erage side
The sae ces are ied with L sotion o araoradehde in 01= hoshate eramp
lt 72 and 1L gtaradehde or 2h at aient teeratre arno+isamp 196) The
ateria is then dehdrated in a graded ethano series ro 10L to 100L and eedded in
ltistoresin eedding it Mng
To reare the ainas the tisse ocs shod e sectioned at ) to 10 on a
icrotoe Sectioning the ocs at ) a rest in section too thin that a e diict
to see nder the icroscoe Sectioning the ocs at a thicness o+er 10 can rest in
serosition o ces
ltistocheica reaction can e carried ot with Toidine Be TB at lt 0 as
etachroatic stain to detect oanionic ectins ida 1977
The hotoicrograhs o the ce strctre shown herein are or eons sitted
to trasond and osotic dehdration and were taen sing an gts BO)1
ight icroscoe with digita iage catre sste and the ocs were sectioned at 8
E))e$ o) U(rsoampd iamp Fri Tisse
The icroscoic iage anasis o resh eon showed tica thin-waed ces
with nora orhoog and soe intercear saces igre 1 er ew ces had
ndated was
108
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 630
Figre 1 hotoicrograhs o eon ces eore rocessing raw rit =agniication o (80
t the end o the trasonic re-treatent itte change was oser+ed in the rit oistre
content when sitted to trasond in a distied water ath The rit incororated water
ater 20 intes sitted to trasond increasing 87L its water content =icroscoic
iage anasis showed two distinct regionsamp one region where the ces ecae oated as a
rest o water gain igre 2 and a second region where the ces ecae ch saer and
neede shaed igre 2B
Figre 2 hotoicrograhs o eon ces ater 20 intes o trasond re-treatent Region with
oated ces and B Region with icroscoic channes =agniication o (80
Figre 2B shows that icroscoic channes are ored the eongation and attening
o ces in soe regions o the sae These neede shaed ces were not oser+ed in the
resh rit and were oser+ed in a saes sitted to trasonic re-treatent Soe
$trasond in Frit rocessing 109
researchers ha+e reorted that trasonic wa+es a create icroscoic channes Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
Bancoamp and Jaego-MHre3amp 2006amp t did not show an icroscoic iage
ter (0 intes o trasonic treatent the icroscoic channes ecae roader
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 730
igre (B and soe new saer icroscoic channes aeared The region with oated
ces was sti oser+ed igre ( The roadening o the icroscoic channes eain the
rther increase in the eecti+e water disi+it o the rit oser+ed dring air-
dring rocess and the increase in the eecti+e disi+it o igents and soe soids
oser+ed in etraction rocesses There is no indication o oss o strength o the ce
wa and dring nie ctting the ces at the order did not ai nder stress as
haens when the rit is sitted to osotic dehdration No ce readown was
oser+ed in the saes sittedto ow reAenc trasond
Figre ( hotoicrograhs o eon ces ater (0 intes o trasond re-treatent Region with oated ces and B Region with icroscoic channes =agniication o (80
The eecti+e disi+it in rits is deendent on tisse strctre and on the rit
orosit The ce was act as a sei-ereae erane inerring in a resistance to
dision o water and soids n increase in orosit increases the +oid sace or water todise and decreases resistance or dision The se o trasond increased the eecti+e
water disi+it o eonsamp ananas and saota dring the air-dring rocess redcing
the tie reAired or dringamp coniring the oser+ations o Fente-Banco et a 2006 that
the trasonic re-treatent aects the rit tisse aing easier or the water to dise
dring air-dring and showed that the icroscoic channes a contrite with the higher
eecti+e
water disi+it
gtther re-treatent sed in dring is the osotic dehdrationamp which resents a
coete dierent eect o+er the rit tisse ter (0 intes nder osotic
treatent se+era dierences are oser+ed in the ce strctre de to the high water
oss ring osotic dehdration the ce was ecoe distorted and saer throghot o
the saes In soe regions the Pnctions etween adPacent ces are sti resent
t with redced intercear saces igre whie in other regions disrtion o
the ces are oser+ed casing an increase o intercear saces which occr de to
the soii3ing o cheator- soe ectin o the idde aea igre B
rin3i+ai et aamp 2006 heator-soe ectin is the sstance that ost contrites to
ce adhesion and irness and according to the icroscoic iages the cheator-soe
ectin artia soii3e at the ear stages o
110Sei Rodriges and Faiano N Fernandes
osotic dehdration ring trasond aicationamp no increase o intercear saces was
oser+ed or has een reorted in the iteratre
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 330
e3 and Brgosamp 199)aamp eroidase e3 and Brgosamp 199)amp iase and rotease
ercetamp e3amp and Brgosamp 1997amp and toato or orange ectinethestearase dioeamp
2002 e3amp ercetamp SHnche3amp and Brgosamp 1998 ercetamp e3amp and Brgosamp 1999 ercetamp
SHnche3amp Brgosamp =ontanesamp and e3-Besaamp 2002amp a with an increased inacti+ation For
eaeamp e3 et a 1998 reorted that the D-+aes o toato ectinethestearase at
62)o were redced )(-odamp ro ) in in thera treatents to 08) in
anotherosonication The inacti+ation eect o trasond is attritae ain to theca+itation rooted the sonication
Ra+iaanamp 5hang and Feng 200) carried ot trasonic inacti+ation tests with
toato ectinethesterase at )0amp 61amp and 72o Thera on tests at )0amp 61amp and 72
o
were aso condcted to deineate ossie additi+e or snergistic eects In thera
inacti+ation testsamp the redction in ectinethestearase resida acti+it at )0o was
negigie whie D-+aes
at 61 and 72o were 2990 and 2)( in D-+aes +aried ro 20 to 206 in in
sonication tests t were redced to 0(in in the therosonication test at 72o oared to
the en3e inacti+ation test at 61oamp therosonication at the sae teeratre increased the
inacti+ation (9 to (7-odamp whie at 72o the increase was (648-odamp deending on
ca+itation intensit The athors reosted a strong snergistic eect in the therosonication
tests The increase in the inacti+ation was ore rononced at ow teeratres
Sonication can aso e sed to destro icroorganiss in oods =an athors
ha+e reorted that ca+itation cased sonication is resonsie or disersion o
cs o icroorganissamp odiication o the cear acti+itamp nctring o the ce
wa and increasing sensiti+it to heat ltowe+eramp the etha eect o trasond is not the
sae or a icroorganiss Jenera the trasond treatent is not ch eecti+e
on sa rond ces ingeramp 197) For eaeamp Jra-ositi+e acteriaamp sch as
Staphylococcus aureus and enterococci gtrdone3amp San3amp lternande3 and oe3-oren3oamp198 are Aite resistant to trasond aication Bacteria sores are e+en ore resistant
hed and Rsseamp 197) Bocher and echowichamp 1979 The coined eect o
trasonic wa+es and heat treatent aied sitaneos aears to e +er eecti+e
iccoiniamp Taiandieramp Ciheamp eas and Strehaianoamp 1997 and e+en ore eecti+e
coining heat and trasond nder ressre
Rasoamp ondon and Saa Treatamp 199 The sae coination o eects has een
deonstrated to ha+e a Aite eecti+e deacti+ating action on +arios en3es o interest in
ood technoog e3 et aamp 199 e3 and Brgosamp 199)a thogh the ossiiit o
deacti+ating en3es or destroing icroorganiss trasond wa+esamp aone or in
coination with other hsica treatentsamp has een wide sed or aorator aications
in icroioogamp inoog and en3oogamp the sae is not tre or indstria
aications
e Jennaroamp aa+eaamp Roano and =asi 1999 stdied the eect o sonication
on eroidase inacti+ation The coined eect o high ower trasond and teeratre
on the acti+it o eroidase te I ro horseradish ssended in water was stdied The
tests were erored at 80K sing ower trasonds ha+ing reAencies o 20amp 0amp and 60
lt3 $trasonic owers +aried in the range ro 0 to 120 C oined treatents were
carried ot sing a aorator scae ant oerating in continos and in atch
ode In continos eerientsamp 6 o ssension was circated in the ant ha+ing asanitation chaer o 20 In the other caseamp two sets o eerients were carried
ot sing a sanitation chaer o 100 treating 0 or 80 o ssensionsamp
resecti+e It was ond that the decia redction tie o eroidase at 80Kamp 80amp
redces ro 6) to 10 in ca
106
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 430
Sei Rodriges and Faiano N Fernandes
when trasonds are aied In articaramp 80 +aries with trasonic oweramp sonotrode
geoetr and +oe o ssensions sitted to the treatent
Free3ing is an eceent ethod or ong reser+ation o ood rodcts and has
gained widesread attention Jenera seaingamp ree3ing reser+ation ro+ides ood
rodcts with etter tasteamp tetre and ntritiona +ae than an other reser+ation ethods
In recent earsamp increased ownershi o doestic ree3ers and icrowa+e o+ens has oostedraid increases in saes o ro3en ood Feowsamp 2000 rrent chaenges ie on rodction
eicienc and high rodct Aait ltowe+eramp the drawac o the resence o arge ice
crstas within the ood which rests in redction in eating Aait inherent eists and has
staed the de+eoent
o ree3ing reser+ation =ore and ore research Bstaadamp 1999 =artinoamp gtteroamp San3amp and
5arit3amp 1998 Ngaoamp Baareamp Renodsamp and =awsonamp 1999 aniested that the Aait o
ro3en ood is cose reated to the si3e and ocation o ice crstas oredamp which in trn
arge deends on the rate o ree3ing and ina teeratre in ree3ing rocess The ree3ing
rate go+erns the oration o ice crstas within ro3en rodcts Raid ree3ing
rodces sa intracear ice crstasamp whie sow ree3ing ors arge ice crstas arge
ice crstas wod case daages to ood Aait incding aearanceamp sensor
roertiesamp teta attrites and ntritiona +ae Frtheroreamp the cear strctre o
ioogica originated oodsts wod e rtred with the rest o dri oss on thawing
Etensi+e research has een carried ot to redce the si3e o ice crstas on ro3en rodcts
This can e achie+ed +er high ree3ing rateamp oring sa and e+en ice crstas
throghot the oodsts For this roseamp ree3ing ethods caae o ensring ro3en
ood o the ai ina Aait ha+e een de+eoed ir ree3ingamp contact ree3ingamp
iersion ree3ingamp crogenic ree3ing and their coinations are the ost coon
ethods sed in ree3ing indstr to otain oti ree3ing rate or ood rodcts New ethods are eing roosed and de+eoed ain in aorator scaeamp eg the
high-ressre-assisted ree3ing aiche+samp norramp and iordamp 199) gtteroamp =artinoamp
5arit3amp Soasamp and San3amp 2000 San3amp aaciosamp oe3amp and gtrdone3amp 198)amp or
dehdroree3ing Sia33iamp Raggioamp Bignoneamp and =ascheroniamp 1998
ccording to i and Sn 2002 ower trasond has ro+ed to e se in controing
crstaisation rocess It as eecti+e roes in the initiation o ncei and sseAent crsta
growth $nder the inence o ower trasondamp ch ore raid and e+en
nceation occrs In ree3ingamp this wod ead to ine ice crstas and shortening the tie
etween the onset o crstaisation and the coete oration o iceamp ths redcing
daages to cear strctre This a e ost de to acostic ca+itationamp which
consists o the orationamp growth and +ioent coase o sa es or +oids in iAids
Siaamp Beneitoamp Sanche3amp and Rosseoamp 1998 The ca+itation es can act as ncei
or crsta growthamp andDor the ncei aread resent wod e ragented into saer
ones cased the strong orces originating ro the coase o ca+itation es
=asonamp 1998 Frtheroreamp other stdies
ia and Sastramp 1990 Sastramp Shenamp and Baisdeamp 1989 ha+e shown that trasond wod
eecti+e iro+e con+ecti+e heat transer coeicient Enhancing the heat
transer coeicient etween the ood rodcts eing ro3en and the rerigerating edi is
one o the ost se easres or raid reo+a sensie heat and atent heat o sion so as to intensi the ree3ing rocess ower trasond is roising to e aied in
ree3ing with its direct eects on heat transer and crstai3ation rocess
i and Sn 2002 stdied the eect o ower trasond on ree3ing rate o otatoes The
eect o ower trasond on ree3ing rate was inenced trasond oweramp
eosre tie and the ree3ing hase to which trasond was aied ltowe+eramp the trasond
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 530
ower
$trasond in Frit rocessing 107
and eosre tie shod e chosen with the consideration o thera eect o trasond In
this stdamp the ree3ing rate was iro+ed great when trasond 1)8) C was aied or
2 in Chen trasond was aied to the hase change eriod dring ree3ing rocessamp the
ree3ing rate was increased signiicant
The echanica and hsica eects o sond can e sed to enhance an
rocesses where ass transer taes ace Thsamp this echanis can e o great ree+ance
to dringamp dewatering and etraction rocesses $trasond aication a aso change the
+iscositamp srace tension and deor oros soid aterias Taretonamp 1992
2 EFFECT OF ULTRASOUND IN THE FRUIT TISSUE
The eect o trasond aication on the cear strctre can e stdied
ight icrosco anasis To show the eect o trasond o+er the cear strctreand the changes that occr with tie wi e shown and coared with the eects
rodced osotic dehdration other oar re-treatent
Li i$ros$oi$ Aamp(ysis
t the end the re-treatent a ce sae has to e care ct 000) a+erage side
The sae ces are ied with L sotion o araoradehde in 01= hoshate eramp
lt 72 and 1L gtaradehde or 2h at aient teeratre arno+isamp 196) The
ateria is then dehdrated in a graded ethano series ro 10L to 100L and eedded in
ltistoresin eedding it Mng
To reare the ainas the tisse ocs shod e sectioned at ) to 10 on a
icrotoe Sectioning the ocs at ) a rest in section too thin that a e diict
to see nder the icroscoe Sectioning the ocs at a thicness o+er 10 can rest in
serosition o ces
ltistocheica reaction can e carried ot with Toidine Be TB at lt 0 as
etachroatic stain to detect oanionic ectins ida 1977
The hotoicrograhs o the ce strctre shown herein are or eons sitted
to trasond and osotic dehdration and were taen sing an gts BO)1
ight icroscoe with digita iage catre sste and the ocs were sectioned at 8
E))e$ o) U(rsoampd iamp Fri Tisse
The icroscoic iage anasis o resh eon showed tica thin-waed ces
with nora orhoog and soe intercear saces igre 1 er ew ces had
ndated was
108
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 630
Figre 1 hotoicrograhs o eon ces eore rocessing raw rit =agniication o (80
t the end o the trasonic re-treatent itte change was oser+ed in the rit oistre
content when sitted to trasond in a distied water ath The rit incororated water
ater 20 intes sitted to trasond increasing 87L its water content =icroscoic
iage anasis showed two distinct regionsamp one region where the ces ecae oated as a
rest o water gain igre 2 and a second region where the ces ecae ch saer and
neede shaed igre 2B
Figre 2 hotoicrograhs o eon ces ater 20 intes o trasond re-treatent Region with
oated ces and B Region with icroscoic channes =agniication o (80
Figre 2B shows that icroscoic channes are ored the eongation and attening
o ces in soe regions o the sae These neede shaed ces were not oser+ed in the
resh rit and were oser+ed in a saes sitted to trasonic re-treatent Soe
$trasond in Frit rocessing 109
researchers ha+e reorted that trasonic wa+es a create icroscoic channes Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
Bancoamp and Jaego-MHre3amp 2006amp t did not show an icroscoic iage
ter (0 intes o trasonic treatent the icroscoic channes ecae roader
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 730
igre (B and soe new saer icroscoic channes aeared The region with oated
ces was sti oser+ed igre ( The roadening o the icroscoic channes eain the
rther increase in the eecti+e water disi+it o the rit oser+ed dring air-
dring rocess and the increase in the eecti+e disi+it o igents and soe soids
oser+ed in etraction rocesses There is no indication o oss o strength o the ce
wa and dring nie ctting the ces at the order did not ai nder stress as
haens when the rit is sitted to osotic dehdration No ce readown was
oser+ed in the saes sittedto ow reAenc trasond
Figre ( hotoicrograhs o eon ces ater (0 intes o trasond re-treatent Region with oated ces and B Region with icroscoic channes =agniication o (80
The eecti+e disi+it in rits is deendent on tisse strctre and on the rit
orosit The ce was act as a sei-ereae erane inerring in a resistance to
dision o water and soids n increase in orosit increases the +oid sace or water todise and decreases resistance or dision The se o trasond increased the eecti+e
water disi+it o eonsamp ananas and saota dring the air-dring rocess redcing
the tie reAired or dringamp coniring the oser+ations o Fente-Banco et a 2006 that
the trasonic re-treatent aects the rit tisse aing easier or the water to dise
dring air-dring and showed that the icroscoic channes a contrite with the higher
eecti+e
water disi+it
gtther re-treatent sed in dring is the osotic dehdrationamp which resents a
coete dierent eect o+er the rit tisse ter (0 intes nder osotic
treatent se+era dierences are oser+ed in the ce strctre de to the high water
oss ring osotic dehdration the ce was ecoe distorted and saer throghot o
the saes In soe regions the Pnctions etween adPacent ces are sti resent
t with redced intercear saces igre whie in other regions disrtion o
the ces are oser+ed casing an increase o intercear saces which occr de to
the soii3ing o cheator- soe ectin o the idde aea igre B
rin3i+ai et aamp 2006 heator-soe ectin is the sstance that ost contrites to
ce adhesion and irness and according to the icroscoic iages the cheator-soe
ectin artia soii3e at the ear stages o
110Sei Rodriges and Faiano N Fernandes
osotic dehdration ring trasond aicationamp no increase o intercear saces was
oser+ed or has een reorted in the iteratre
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 430
Sei Rodriges and Faiano N Fernandes
when trasonds are aied In articaramp 80 +aries with trasonic oweramp sonotrode
geoetr and +oe o ssensions sitted to the treatent
Free3ing is an eceent ethod or ong reser+ation o ood rodcts and has
gained widesread attention Jenera seaingamp ree3ing reser+ation ro+ides ood
rodcts with etter tasteamp tetre and ntritiona +ae than an other reser+ation ethods
In recent earsamp increased ownershi o doestic ree3ers and icrowa+e o+ens has oostedraid increases in saes o ro3en ood Feowsamp 2000 rrent chaenges ie on rodction
eicienc and high rodct Aait ltowe+eramp the drawac o the resence o arge ice
crstas within the ood which rests in redction in eating Aait inherent eists and has
staed the de+eoent
o ree3ing reser+ation =ore and ore research Bstaadamp 1999 =artinoamp gtteroamp San3amp and
5arit3amp 1998 Ngaoamp Baareamp Renodsamp and =awsonamp 1999 aniested that the Aait o
ro3en ood is cose reated to the si3e and ocation o ice crstas oredamp which in trn
arge deends on the rate o ree3ing and ina teeratre in ree3ing rocess The ree3ing
rate go+erns the oration o ice crstas within ro3en rodcts Raid ree3ing
rodces sa intracear ice crstasamp whie sow ree3ing ors arge ice crstas arge
ice crstas wod case daages to ood Aait incding aearanceamp sensor
roertiesamp teta attrites and ntritiona +ae Frtheroreamp the cear strctre o
ioogica originated oodsts wod e rtred with the rest o dri oss on thawing
Etensi+e research has een carried ot to redce the si3e o ice crstas on ro3en rodcts
This can e achie+ed +er high ree3ing rateamp oring sa and e+en ice crstas
throghot the oodsts For this roseamp ree3ing ethods caae o ensring ro3en
ood o the ai ina Aait ha+e een de+eoed ir ree3ingamp contact ree3ingamp
iersion ree3ingamp crogenic ree3ing and their coinations are the ost coon
ethods sed in ree3ing indstr to otain oti ree3ing rate or ood rodcts New ethods are eing roosed and de+eoed ain in aorator scaeamp eg the
high-ressre-assisted ree3ing aiche+samp norramp and iordamp 199) gtteroamp =artinoamp
5arit3amp Soasamp and San3amp 2000 San3amp aaciosamp oe3amp and gtrdone3amp 198)amp or
dehdroree3ing Sia33iamp Raggioamp Bignoneamp and =ascheroniamp 1998
ccording to i and Sn 2002 ower trasond has ro+ed to e se in controing
crstaisation rocess It as eecti+e roes in the initiation o ncei and sseAent crsta
growth $nder the inence o ower trasondamp ch ore raid and e+en
nceation occrs In ree3ingamp this wod ead to ine ice crstas and shortening the tie
etween the onset o crstaisation and the coete oration o iceamp ths redcing
daages to cear strctre This a e ost de to acostic ca+itationamp which
consists o the orationamp growth and +ioent coase o sa es or +oids in iAids
Siaamp Beneitoamp Sanche3amp and Rosseoamp 1998 The ca+itation es can act as ncei
or crsta growthamp andDor the ncei aread resent wod e ragented into saer
ones cased the strong orces originating ro the coase o ca+itation es
=asonamp 1998 Frtheroreamp other stdies
ia and Sastramp 1990 Sastramp Shenamp and Baisdeamp 1989 ha+e shown that trasond wod
eecti+e iro+e con+ecti+e heat transer coeicient Enhancing the heat
transer coeicient etween the ood rodcts eing ro3en and the rerigerating edi is
one o the ost se easres or raid reo+a sensie heat and atent heat o sion so as to intensi the ree3ing rocess ower trasond is roising to e aied in
ree3ing with its direct eects on heat transer and crstai3ation rocess
i and Sn 2002 stdied the eect o ower trasond on ree3ing rate o otatoes The
eect o ower trasond on ree3ing rate was inenced trasond oweramp
eosre tie and the ree3ing hase to which trasond was aied ltowe+eramp the trasond
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 530
ower
$trasond in Frit rocessing 107
and eosre tie shod e chosen with the consideration o thera eect o trasond In
this stdamp the ree3ing rate was iro+ed great when trasond 1)8) C was aied or
2 in Chen trasond was aied to the hase change eriod dring ree3ing rocessamp the
ree3ing rate was increased signiicant
The echanica and hsica eects o sond can e sed to enhance an
rocesses where ass transer taes ace Thsamp this echanis can e o great ree+ance
to dringamp dewatering and etraction rocesses $trasond aication a aso change the
+iscositamp srace tension and deor oros soid aterias Taretonamp 1992
2 EFFECT OF ULTRASOUND IN THE FRUIT TISSUE
The eect o trasond aication on the cear strctre can e stdied
ight icrosco anasis To show the eect o trasond o+er the cear strctreand the changes that occr with tie wi e shown and coared with the eects
rodced osotic dehdration other oar re-treatent
Li i$ros$oi$ Aamp(ysis
t the end the re-treatent a ce sae has to e care ct 000) a+erage side
The sae ces are ied with L sotion o araoradehde in 01= hoshate eramp
lt 72 and 1L gtaradehde or 2h at aient teeratre arno+isamp 196) The
ateria is then dehdrated in a graded ethano series ro 10L to 100L and eedded in
ltistoresin eedding it Mng
To reare the ainas the tisse ocs shod e sectioned at ) to 10 on a
icrotoe Sectioning the ocs at ) a rest in section too thin that a e diict
to see nder the icroscoe Sectioning the ocs at a thicness o+er 10 can rest in
serosition o ces
ltistocheica reaction can e carried ot with Toidine Be TB at lt 0 as
etachroatic stain to detect oanionic ectins ida 1977
The hotoicrograhs o the ce strctre shown herein are or eons sitted
to trasond and osotic dehdration and were taen sing an gts BO)1
ight icroscoe with digita iage catre sste and the ocs were sectioned at 8
E))e$ o) U(rsoampd iamp Fri Tisse
The icroscoic iage anasis o resh eon showed tica thin-waed ces
with nora orhoog and soe intercear saces igre 1 er ew ces had
ndated was
108
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 630
Figre 1 hotoicrograhs o eon ces eore rocessing raw rit =agniication o (80
t the end o the trasonic re-treatent itte change was oser+ed in the rit oistre
content when sitted to trasond in a distied water ath The rit incororated water
ater 20 intes sitted to trasond increasing 87L its water content =icroscoic
iage anasis showed two distinct regionsamp one region where the ces ecae oated as a
rest o water gain igre 2 and a second region where the ces ecae ch saer and
neede shaed igre 2B
Figre 2 hotoicrograhs o eon ces ater 20 intes o trasond re-treatent Region with
oated ces and B Region with icroscoic channes =agniication o (80
Figre 2B shows that icroscoic channes are ored the eongation and attening
o ces in soe regions o the sae These neede shaed ces were not oser+ed in the
resh rit and were oser+ed in a saes sitted to trasonic re-treatent Soe
$trasond in Frit rocessing 109
researchers ha+e reorted that trasonic wa+es a create icroscoic channes Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
Bancoamp and Jaego-MHre3amp 2006amp t did not show an icroscoic iage
ter (0 intes o trasonic treatent the icroscoic channes ecae roader
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 730
igre (B and soe new saer icroscoic channes aeared The region with oated
ces was sti oser+ed igre ( The roadening o the icroscoic channes eain the
rther increase in the eecti+e water disi+it o the rit oser+ed dring air-
dring rocess and the increase in the eecti+e disi+it o igents and soe soids
oser+ed in etraction rocesses There is no indication o oss o strength o the ce
wa and dring nie ctting the ces at the order did not ai nder stress as
haens when the rit is sitted to osotic dehdration No ce readown was
oser+ed in the saes sittedto ow reAenc trasond
Figre ( hotoicrograhs o eon ces ater (0 intes o trasond re-treatent Region with oated ces and B Region with icroscoic channes =agniication o (80
The eecti+e disi+it in rits is deendent on tisse strctre and on the rit
orosit The ce was act as a sei-ereae erane inerring in a resistance to
dision o water and soids n increase in orosit increases the +oid sace or water todise and decreases resistance or dision The se o trasond increased the eecti+e
water disi+it o eonsamp ananas and saota dring the air-dring rocess redcing
the tie reAired or dringamp coniring the oser+ations o Fente-Banco et a 2006 that
the trasonic re-treatent aects the rit tisse aing easier or the water to dise
dring air-dring and showed that the icroscoic channes a contrite with the higher
eecti+e
water disi+it
gtther re-treatent sed in dring is the osotic dehdrationamp which resents a
coete dierent eect o+er the rit tisse ter (0 intes nder osotic
treatent se+era dierences are oser+ed in the ce strctre de to the high water
oss ring osotic dehdration the ce was ecoe distorted and saer throghot o
the saes In soe regions the Pnctions etween adPacent ces are sti resent
t with redced intercear saces igre whie in other regions disrtion o
the ces are oser+ed casing an increase o intercear saces which occr de to
the soii3ing o cheator- soe ectin o the idde aea igre B
rin3i+ai et aamp 2006 heator-soe ectin is the sstance that ost contrites to
ce adhesion and irness and according to the icroscoic iages the cheator-soe
ectin artia soii3e at the ear stages o
110Sei Rodriges and Faiano N Fernandes
osotic dehdration ring trasond aicationamp no increase o intercear saces was
oser+ed or has een reorted in the iteratre
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 530
ower
$trasond in Frit rocessing 107
and eosre tie shod e chosen with the consideration o thera eect o trasond In
this stdamp the ree3ing rate was iro+ed great when trasond 1)8) C was aied or
2 in Chen trasond was aied to the hase change eriod dring ree3ing rocessamp the
ree3ing rate was increased signiicant
The echanica and hsica eects o sond can e sed to enhance an
rocesses where ass transer taes ace Thsamp this echanis can e o great ree+ance
to dringamp dewatering and etraction rocesses $trasond aication a aso change the
+iscositamp srace tension and deor oros soid aterias Taretonamp 1992
2 EFFECT OF ULTRASOUND IN THE FRUIT TISSUE
The eect o trasond aication on the cear strctre can e stdied
ight icrosco anasis To show the eect o trasond o+er the cear strctreand the changes that occr with tie wi e shown and coared with the eects
rodced osotic dehdration other oar re-treatent
Li i$ros$oi$ Aamp(ysis
t the end the re-treatent a ce sae has to e care ct 000) a+erage side
The sae ces are ied with L sotion o araoradehde in 01= hoshate eramp
lt 72 and 1L gtaradehde or 2h at aient teeratre arno+isamp 196) The
ateria is then dehdrated in a graded ethano series ro 10L to 100L and eedded in
ltistoresin eedding it Mng
To reare the ainas the tisse ocs shod e sectioned at ) to 10 on a
icrotoe Sectioning the ocs at ) a rest in section too thin that a e diict
to see nder the icroscoe Sectioning the ocs at a thicness o+er 10 can rest in
serosition o ces
ltistocheica reaction can e carried ot with Toidine Be TB at lt 0 as
etachroatic stain to detect oanionic ectins ida 1977
The hotoicrograhs o the ce strctre shown herein are or eons sitted
to trasond and osotic dehdration and were taen sing an gts BO)1
ight icroscoe with digita iage catre sste and the ocs were sectioned at 8
E))e$ o) U(rsoampd iamp Fri Tisse
The icroscoic iage anasis o resh eon showed tica thin-waed ces
with nora orhoog and soe intercear saces igre 1 er ew ces had
ndated was
108
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 630
Figre 1 hotoicrograhs o eon ces eore rocessing raw rit =agniication o (80
t the end o the trasonic re-treatent itte change was oser+ed in the rit oistre
content when sitted to trasond in a distied water ath The rit incororated water
ater 20 intes sitted to trasond increasing 87L its water content =icroscoic
iage anasis showed two distinct regionsamp one region where the ces ecae oated as a
rest o water gain igre 2 and a second region where the ces ecae ch saer and
neede shaed igre 2B
Figre 2 hotoicrograhs o eon ces ater 20 intes o trasond re-treatent Region with
oated ces and B Region with icroscoic channes =agniication o (80
Figre 2B shows that icroscoic channes are ored the eongation and attening
o ces in soe regions o the sae These neede shaed ces were not oser+ed in the
resh rit and were oser+ed in a saes sitted to trasonic re-treatent Soe
$trasond in Frit rocessing 109
researchers ha+e reorted that trasonic wa+es a create icroscoic channes Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
Bancoamp and Jaego-MHre3amp 2006amp t did not show an icroscoic iage
ter (0 intes o trasonic treatent the icroscoic channes ecae roader
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 730
igre (B and soe new saer icroscoic channes aeared The region with oated
ces was sti oser+ed igre ( The roadening o the icroscoic channes eain the
rther increase in the eecti+e water disi+it o the rit oser+ed dring air-
dring rocess and the increase in the eecti+e disi+it o igents and soe soids
oser+ed in etraction rocesses There is no indication o oss o strength o the ce
wa and dring nie ctting the ces at the order did not ai nder stress as
haens when the rit is sitted to osotic dehdration No ce readown was
oser+ed in the saes sittedto ow reAenc trasond
Figre ( hotoicrograhs o eon ces ater (0 intes o trasond re-treatent Region with oated ces and B Region with icroscoic channes =agniication o (80
The eecti+e disi+it in rits is deendent on tisse strctre and on the rit
orosit The ce was act as a sei-ereae erane inerring in a resistance to
dision o water and soids n increase in orosit increases the +oid sace or water todise and decreases resistance or dision The se o trasond increased the eecti+e
water disi+it o eonsamp ananas and saota dring the air-dring rocess redcing
the tie reAired or dringamp coniring the oser+ations o Fente-Banco et a 2006 that
the trasonic re-treatent aects the rit tisse aing easier or the water to dise
dring air-dring and showed that the icroscoic channes a contrite with the higher
eecti+e
water disi+it
gtther re-treatent sed in dring is the osotic dehdrationamp which resents a
coete dierent eect o+er the rit tisse ter (0 intes nder osotic
treatent se+era dierences are oser+ed in the ce strctre de to the high water
oss ring osotic dehdration the ce was ecoe distorted and saer throghot o
the saes In soe regions the Pnctions etween adPacent ces are sti resent
t with redced intercear saces igre whie in other regions disrtion o
the ces are oser+ed casing an increase o intercear saces which occr de to
the soii3ing o cheator- soe ectin o the idde aea igre B
rin3i+ai et aamp 2006 heator-soe ectin is the sstance that ost contrites to
ce adhesion and irness and according to the icroscoic iages the cheator-soe
ectin artia soii3e at the ear stages o
110Sei Rodriges and Faiano N Fernandes
osotic dehdration ring trasond aicationamp no increase o intercear saces was
oser+ed or has een reorted in the iteratre
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 630
Figre 1 hotoicrograhs o eon ces eore rocessing raw rit =agniication o (80
t the end o the trasonic re-treatent itte change was oser+ed in the rit oistre
content when sitted to trasond in a distied water ath The rit incororated water
ater 20 intes sitted to trasond increasing 87L its water content =icroscoic
iage anasis showed two distinct regionsamp one region where the ces ecae oated as a
rest o water gain igre 2 and a second region where the ces ecae ch saer and
neede shaed igre 2B
Figre 2 hotoicrograhs o eon ces ater 20 intes o trasond re-treatent Region with
oated ces and B Region with icroscoic channes =agniication o (80
Figre 2B shows that icroscoic channes are ored the eongation and attening
o ces in soe regions o the sae These neede shaed ces were not oser+ed in the
resh rit and were oser+ed in a saes sitted to trasonic re-treatent Soe
$trasond in Frit rocessing 109
researchers ha+e reorted that trasonic wa+es a create icroscoic channes Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
Bancoamp and Jaego-MHre3amp 2006amp t did not show an icroscoic iage
ter (0 intes o trasonic treatent the icroscoic channes ecae roader
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 730
igre (B and soe new saer icroscoic channes aeared The region with oated
ces was sti oser+ed igre ( The roadening o the icroscoic channes eain the
rther increase in the eecti+e water disi+it o the rit oser+ed dring air-
dring rocess and the increase in the eecti+e disi+it o igents and soe soids
oser+ed in etraction rocesses There is no indication o oss o strength o the ce
wa and dring nie ctting the ces at the order did not ai nder stress as
haens when the rit is sitted to osotic dehdration No ce readown was
oser+ed in the saes sittedto ow reAenc trasond
Figre ( hotoicrograhs o eon ces ater (0 intes o trasond re-treatent Region with oated ces and B Region with icroscoic channes =agniication o (80
The eecti+e disi+it in rits is deendent on tisse strctre and on the rit
orosit The ce was act as a sei-ereae erane inerring in a resistance to
dision o water and soids n increase in orosit increases the +oid sace or water todise and decreases resistance or dision The se o trasond increased the eecti+e
water disi+it o eonsamp ananas and saota dring the air-dring rocess redcing
the tie reAired or dringamp coniring the oser+ations o Fente-Banco et a 2006 that
the trasonic re-treatent aects the rit tisse aing easier or the water to dise
dring air-dring and showed that the icroscoic channes a contrite with the higher
eecti+e
water disi+it
gtther re-treatent sed in dring is the osotic dehdrationamp which resents a
coete dierent eect o+er the rit tisse ter (0 intes nder osotic
treatent se+era dierences are oser+ed in the ce strctre de to the high water
oss ring osotic dehdration the ce was ecoe distorted and saer throghot o
the saes In soe regions the Pnctions etween adPacent ces are sti resent
t with redced intercear saces igre whie in other regions disrtion o
the ces are oser+ed casing an increase o intercear saces which occr de to
the soii3ing o cheator- soe ectin o the idde aea igre B
rin3i+ai et aamp 2006 heator-soe ectin is the sstance that ost contrites to
ce adhesion and irness and according to the icroscoic iages the cheator-soe
ectin artia soii3e at the ear stages o
110Sei Rodriges and Faiano N Fernandes
osotic dehdration ring trasond aicationamp no increase o intercear saces was
oser+ed or has een reorted in the iteratre
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 730
igre (B and soe new saer icroscoic channes aeared The region with oated
ces was sti oser+ed igre ( The roadening o the icroscoic channes eain the
rther increase in the eecti+e water disi+it o the rit oser+ed dring air-
dring rocess and the increase in the eecti+e disi+it o igents and soe soids
oser+ed in etraction rocesses There is no indication o oss o strength o the ce
wa and dring nie ctting the ces at the order did not ai nder stress as
haens when the rit is sitted to osotic dehdration No ce readown was
oser+ed in the saes sittedto ow reAenc trasond
Figre ( hotoicrograhs o eon ces ater (0 intes o trasond re-treatent Region with oated ces and B Region with icroscoic channes =agniication o (80
The eecti+e disi+it in rits is deendent on tisse strctre and on the rit
orosit The ce was act as a sei-ereae erane inerring in a resistance to
dision o water and soids n increase in orosit increases the +oid sace or water todise and decreases resistance or dision The se o trasond increased the eecti+e
water disi+it o eonsamp ananas and saota dring the air-dring rocess redcing
the tie reAired or dringamp coniring the oser+ations o Fente-Banco et a 2006 that
the trasonic re-treatent aects the rit tisse aing easier or the water to dise
dring air-dring and showed that the icroscoic channes a contrite with the higher
eecti+e
water disi+it
gtther re-treatent sed in dring is the osotic dehdrationamp which resents a
coete dierent eect o+er the rit tisse ter (0 intes nder osotic
treatent se+era dierences are oser+ed in the ce strctre de to the high water
oss ring osotic dehdration the ce was ecoe distorted and saer throghot o
the saes In soe regions the Pnctions etween adPacent ces are sti resent
t with redced intercear saces igre whie in other regions disrtion o
the ces are oser+ed casing an increase o intercear saces which occr de to
the soii3ing o cheator- soe ectin o the idde aea igre B
rin3i+ai et aamp 2006 heator-soe ectin is the sstance that ost contrites to
ce adhesion and irness and according to the icroscoic iages the cheator-soe
ectin artia soii3e at the ear stages o
110Sei Rodriges and Faiano N Fernandes
osotic dehdration ring trasond aicationamp no increase o intercear saces was
oser+ed or has een reorted in the iteratre
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 830
Figre hotoicrograhs o eon ces ater (0 intes o osotic dehdration Region with
distorted ces and B Region with disrted ces =agniication o (80
ter 1 hor o osotic treatent ost intercear saces etween the ces disaear
and the ce was ecoe e+en ore distorted igre ) In soe regions o the saes
ce wa readown starts to aear igre )B athogh sti rare The ce wa
strength diinishesamp de to soii3ing o ectinamp coined with high osotic ressre
and ow o sgar oeces into the rit that contrite to the readown o ce
was ectin soii3ing dring osotic dehdration was shown rin3i+ai et a 2006
Figre ) hotoicrograhs o eon ces ater 1 hor o osotic dehdration Region with distortedces and B Region with ces in initia stage o ce readown =agniication o (80
greater change is oser+ed ater 2 hors o osotic treatent when ost ce was are
roen-down and the ew intact ces ha+e se+ere distorted was igre 6 Soii3ing o ectin can e +isa noted decreasing ce wa strength
$trasond in Frit rocessing 111
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 930
Figre 6 hotoicrograhs o eon ces ater 2 hors o osotic dehdration showing ces in ad+anced
stage o ce readown =agniication o (80
The water disi+it in the air-dring rocess a aso increase with the se o
the osotic dehdration re-treatentamp or soe rits and +egetaeamp when carried ot or
ore than one hor This increase is eained the coase o ce wa
eranesamp which aes easier or water to disi+e within the +egetae In this case a
good agreeent was otained etween cear strctre changes and water disi+it
Rodriges and Fernandesamp
2007a Cater disi+it a decrease in the eginning o the osotic dehdration rocess
de to the incororation o sgaramp t increase when the osotic dehdration is carried ot or
ore than one hor de to the readown o ces which owers the resistance to
water dision $trasond aso indces changes on the ce strctreamp t dierent ro
osotic dehdrationamp no ce readown is oser+ed and the increase in disi+it is
attained the oration o icroscoic channes in the ce strctre which aso oer
ower resistance to dision o wateramp igents and soe soids
+ APPLICATION OF ULTRASOUND IN DRING PROCESSES
Se+era rits and +egetaes are rodced in arge Aantitiesamp esecia in troica
contriesamp aiing ain eortation ananaamp ineaeamp orangeamp eonamp ango and se+era
others Soe ritsamp ie oranges and eonsamp are croed ain to rodce rit
Picesamp other are croed aiing direct constion or to e sed in oodsts caesamp Pasamp
ogrtamp and se+era others =ost rit are etree erishae and do not aow the se o
ree3ing or their conser+ation ring can e aied to redce ost-har+est oss o rits
and aso to rodce dehdrated rit sed in oodsts orationsamp ro+iding an etension
o she-ieamp ighter weight or transortation and ess sace or storage =an
+egetaes are sed in
112
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1030
dehdrated oodsts sacesamp ood itresamp sos and others and eneit ro dring to
etend their she-ie
ring is the ost coon ethod o ood reser+ation on+entiona air-dring is
a sitaneos heat and ass transer rocessamp accoanied hase change
Barantiamp =astrocoa and Se+erineamp 199 ring rits and +egetaes throgh air-dring
is done at id teeratres etween 0Q to 70Q to redce the degradation o the rit or
+egetae The rocess taes ro 8 to 2 hors deending on the +egetae that is eing
rocessedamp onits initia oistre contentamp on the desired ina oistre content and on the teeratre sed
in the rocess Teeratre is aintained direct heating o the air assing throgh
the saes aing the air-dring rocess heat intensi+eamp ths eensi+e
Air-Dryiamp
ir-dring corehends two eriods a heat transer-controed ass transer eriod or
constant rate eriod and a dision-controed ass transer eriod or aing rate eriod In
the heat transer-controed ass transer eriod the water reo+a rate is at its aiaamp t
in an +egetae this eriod is genera +er short coared to the dision-controed
ass transer eriod
ir-dring is genera odeed assing dision-controed ass transer with iAid
owing within the rit conoring to Fics second aw o dision The eAation sed to
ode the aing-rate eriod is a siiication o Fics second aw considering ong dring
ties err and Jreenamp 1999
dlt 2 = minus sdot sdot lt minus lt
1dt 991522
2 eA
ccording to the eAationamp redction o air-dring tie can e achie+ed redcing the
initia oistre content lt0 o the rit sent to dr or increasing the eecti+e water
disi+it re-treatents can e sed to redce the initia water content or to odi the
rit tisse strctre in a wa that the eecti+e water disi+it increases aoamp
5hangamp =Pdaramp amp and Snamp 2006 anamp 5haoamp 5hangamp henamp and =Pdaramp 200(
=adaaamp and oe3amp 2002
+1 U(rsoampd Pre-Treeamp
The orces in+o+ed the songe eect cased trasonic wa+es can e higher than
srace tension which aintains the oistre inside the caiaries o the rit creating
icroscoic channes which a ease oistre reo+a These icroscoic channes can e
sed water oeces as a reerentia athwa to dise towards the srace o the rit
or +egetae increasing its eecti+e water disi+it The trasonic wa+es aso redce thedision ondar aer and increase the con+ecti+e ass transer in the sae Taretonamp
1992 Tareton and Caeanamp 1998 Fente-Bancoamp Saraiaamp costa-aricioamp Banco-
$trasond in Frit rocessing 11(
Bancoamp and Jaego-MHre3amp 2006 In additionamp the ca+itations rodced trasond
()
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1130
are eneicia or the reo+a o oistre strong attached
The re-treatent techniAe is sie and in+o+es the iersion o the rit or
+egetae in water to which trasond is aied The treatent can e carried ot at aient
teeratre and no heating is reAiredamp redcing the roaiit o ood degradation =asonamp
1998
Prerioamp o) S(es
Frit or +egetae saes shod e ct to otain cesamp cinders or an other ind o
sices
To cacate water and sgar ossamp the oistre content o the sae has to e
deterined heating in a dring o+en at 10)o or 8hamp according to gt ethod
gtamp 1990 The initia soe soids content o the rit QBri can e deterined
reractoetr
U(rsoampd Pre-Treeamp
The saes shod e iersed in distied water and sitted to trasonic
wa+es dring a eriod o tie Recent stdies Fernandes and Rodrigesamp 2007
Rodriges and Fernandesamp 2007 showed that the aication o trasond shod e
carried ot or at east
10 intes ter 20 intes the changes on the eecti+e water disi+it ecoe sight and
ater (0 intes the changes are insigniicant
The rocess can e carried ot nder aient teeratreamp since higher teeratres do
not show to enhance the eect o trasond Siaamp Beneditoamp SHnche3amp and Rosseamp 1998The rocess can e carried ot acing the saes in an trasonic ath or acing
the saes in a +esse and sing an trasonic ti to indce trasonic wa+es inside the
+esse No echanica agitation is reAired The trasond reAenc shod e etween 2)
and 100
lt3 and intensit ao+e 000 CD2 Teeratre increase is sight not eceeding (Q dring
(0 intes rn Fernandes and Rodrigesamp 2007 Rodriges and Fernandesamp 2007
The water to rit ratio shod e aintained ow Cater to rit ratios ro (1 to 1
weight asis is reerred ecase the area o the reAired +esse or trasonic ath can e
sa ltigher water to rit ratios reAires arger +esses and ore ower
trasond to generate an trasonic intensit ao+e 000 CD2amp increasing ower
constion Fernandes and Rodriges 2007 showed that at this water to rit ratio
the increase in soe soids
content o the iAid edi was sight ess than 20 g soidsD or eonsamp ananas
and ineaes
To cacate water oss dring the trasonic re-treatent the oistre content o
the rit has to e deterined heating in a dring o+en at 10)o or 8hamp according to
gt ethod gtamp 1990 To cacate the sgar oss dring the rocess two
otions can e sed The soe soids content o the rit QBri can to e direct
deterined reractoetr gtr the sgar content o the iAid edi can e deterined
sing coorietric ethods or lt ethods and then the soe soids o the rit
can e cacated ass aance
11
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1230
SS = SS0 minus S
2
whereamp S= is the sgar content o the iAid ediamp SSFR is the soe soids content o the
ritamp and SSFR 0 is the initia soe soids content o the rit
Air-Dryiamp
t the end o the re-treatent the dehdrated saes are drainedamp otted with
asorent aer to reo+e the ecess sotion and transerred to an air-dreramp which can e a
orced circating air-dring o+enamp a ied-ed air-drer or a soar drer The air teeratre
shod e as high as ossie t not so high as to soi the +egetae Teeratres etween
0 to 60Q are sa aied in air-dring o rits and +egetaes
ei Red$ioamp0 er Loss ampd Sr Giamp Driamp e Pre-Treeamp
The erorance o dring re-treatents is coon e+aated the
araeters weight redction CRamp water oss C and sgar gain SJ Cater oss
is the ain araeter and indicates the aont o water reo+ed dring the re-treatent
in reation to the initia weight o the saes Sgar gain is an iortant araeter
that indicates the aont o soe soids that are incororated the sae dring the
re-treatent ltigh sgar gain +aes a ater the sweetness o the +egetaeamp aso
increasing the caories associated with the rodct Negati+e sgar gain indicates that the
re-treatent was ae to reo+e soe soids ro the +egetae Jenera the
erorance o the re-treatent wi
e satisactor when high water oss is associated with ow sgar gain
Ceightamp oistre content and soe soids content o the rit saes are sed
to cacate weight redction CRamp water oss C and soid gain SJamp according to
the oowing eAations
CRL = w i minus
w sdot 100
w i
C6L = w i sdot Oi minus w 8 sdot O 8
sdot 100w i
(
[w sdot (1 minus O) minus wsdot (1 minus O )]
SJL = s i si
sdot 100
FR FR =
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1330
w i
)
whereamp Oi is the initia rit oistre on wet asis g waterDgamp O is the ina rit oistre on
wet asis g waterDgamp Osi is the initia rit soe soid content g soidDgamp Os is the ina
rit soe soid content g soidDgamp wi is the initia rit ass gamp and w is the ina rit
ass g
$trasond in Frit rocessing 11)
The cacation o sgar gain ased on the initia weight o the saes a e
iseading when ana3ing the rocess ecase it genera rests in a sa +ae
to
10L in ost cases ast anasis o the sgar gain +ae a e interreted that a redced
aont o sgar was incororated the +egetaeamp whereas in soe cases the
aont o sgar in the sae does or e+en triesamp ha+ing a direct iact
in the sensor characteristics o the +egetae and on the caories associated to it To
roer e+aate the incororation o soe soids into the saeamp the sgar gain can ecacated ased on the initia soe soids content rather than on the initia weight o the
sae
[w sdot (1 minus Os ) minus w
i sdot (1 minus Osi )] SJL =
w i sdot (1 minus Osi )sdot 1006
t the end o the trasonic re-treatent itte change is oser+ed in the rit oistre
content and the eect o the trasonic re-treatent on dring is ain oser+ed dring the
air-dring stage where a signiicant increase in the eecti+e water disi+it is ond
ierent ro the se o osotic dehdration where an eressi+e water oss is
oser+edamp when the trasonic re-treatent is aied each rit disa a dierent eha+ioramp
gaining or osing water dring the re-treatent Bananas ha+e gained water dring
the treatent For trasond treatents asting 20 intesamp water gain was 111L
This +ae decreased to 72L when the rit was sitted to trasond or (0
intes tae 1
Fernandes and Rodrigesamp 2007 The sae eha+ior was oser+ed with saotas Achras
sapota which aso gained water dring the trasonic treatent =eonsamp aaasamp
ineaes and Peniao Genipa americana ost a sa aont o water dring the re-
treatent For trasond treatents asting 20 intes the water oss oser+ed in re-treated
eons was 1(L increasing to ))L when the rit was sitted to trasond or
(0 intes tae 1 Rodriges and Fernandesamp 2007 t the end o the trasonic
re- treatentamp itte change was oser+ed in the oistre content o ineaes which
ost etween 21 to (2L o its initia water tae 1
rit sitted to trasonic re-treatent ost soe soids to the iAid
ediand the aont o soe soids ost deended on the rit characteristics tae 1 The oss
o sgars occrs ecase o the dierent sgar concentration osotic ressre etween the
rit and the iAid ediamp which a+ors a ass transer o sgar ro the rit to the iAid
edi and a ass transer o water ro the iAid edi to the rit
The aont o sgars ost ro ananas ater (0 intes in trasonic ath was 21(L o
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1430
the redcing sgars The oss o gcose was 110L ater (0 intes in trasonic ath Figre
7 shows the sgar oss as a nction o the tie sent in trasonic ath In rits with high
initia soe soids contentamp a redction in water gain a e oser+ed ater 10 or
20 intes For ananas a redction in water gain was oser+ed ater 20 intes
nder trasond aication coared to the rests ond or water gain ater 10
intes
Fernandes and Rodrigesamp 2007 This henoenon is eained the higher sgar
oss ro the rit to the iAid edi ond ater 20 intesamp which diinishes thesoid concentration gradient etween the rit and the iAid edi and as a
conseAence ess water enters the rit to coensate or the osotic ressre gradient s
a conseAence o the water gain and the oss o soe soidsamp the oistre content o
the rit ater the trasonic ath increases igre 8
116
Sei Rodriges and Faiano N Fernandes
T(e 1 er (oss ampd sr iamp o) )ris sied o (rsoampd re-reeamp
gterating condition Sgar Jain Cater oss
Banana (Musa spp)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 110L U 22
- 121L U 02
- 21(L U 12
- 1L U 09
- 111L U 0)
- 72L U 09
Melon (Curcumis melo )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 211 U 01(
- 7 U 20
- )22 U 10
V 1( U 02
V 08 U 06
V )) U 2(
Pineapple (Ananas comosus)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 1)(L U 22
- 1)8L U (9
- 189L U 18
V (2L U 06
V 21L U 06
V (1L U 08
Sapota (Achras sapota )
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 16L U 02
- 16L U 0(
- (8L U 02
- 7L U 08
- ((L U 0
- 66L U 0(
Papaya (Carica papaya)
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 67L U 16
- 2L U 0(
- 1)L U 0)
- (0L U 07
- 8L U 1(
- )7L U 1(
Meniao Genipa americana
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
- 122L U 28
- 166L U (6
- 82L U 09
- 112L U 29
- 9)L U 12
- 19L U 1
=eons showed the highest oss o soe soids to the iAid edi The aont o
sgars transerred to the iAid edi dring the rocess was )2L ater (0 intes in
trasonic ath The aont o gcose ost was 2L ater (0 intes in trasonic ath
Rodriges and Fernandesamp 2007 The owest redction in soe soids content to the
iAid edi was oser+ed or saota Achras sapota which ost on (8L o its initia
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1530
sgar content The rest oser+ed or saota a e eained the high starch content o
this rit to (6L o the tota carohdrate content o the rit
$trasond in Frit rocessing 117
Figre 7 Redcing sgars and gcose oss as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
Figre 8 =oistre content o the rit as a nction o tie in trasond ath or ananas Error ars
reresent the standard de+iation
118
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1630
Stdies on osotic dehdration showed that eons gained to 18)L o sgar ater 180
intes in osotic sotion ))QBriamp 6)Qamp ineaes gained to 120L o sgar ater 180
intes in osotic sotion 70QBriamp (0Q and ananas gained to 220L o sgar ater
20 intes in osotic sotion 70QBriamp 60Q aroPoamp Rahanamp Bce and ereraamp 1996
Rastogiamp and Ragha+araoamp 1997 Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 Tees
et aamp 2006 Rodrigesamp and Fernandesamp 2007a s sch the trasonic treatent is an
interesting rocess to rodce ow sgar dried ritsamp since dring trasond re-
treatent the rit osses sgar whereas nder osotic dehdration the incororation o sgar is +er high
The sgar oss showed to e reated to the orosit o the saes =eons ha+ehigh
orosit and showed the highest sgar oss to the iAid ediamp whie rit with
ower orosit showed ower oss o sgar gtther interesting inding is that rits with high
starch content sch as saotas and ananas showed to incororate water dring the
trasonic re- treatent whie rits with ow starch content showed to ose water to the
iAid edi
E))e$ie er Di))siiy Driamp Air-Dryiamp
The eect o the trasonic re-treatent on dring is ain oser+ed dring the air-
dring stage where a signiicant increase in eecti+e water disi+it is oser+ed
Eerienta data is reAired to estiate the eecti+e dision coeicient o the
air- dring rocess The eecti+e water disi+it can e adPsted sing EAation
with a araeter estiation rocedre ased on the inii3ation o the error s o
sAaresamp where the atheatica ode is so+ed nerica integration sing the Rnge-
tta ethodEecti+e water disi+it was aected trasond aication in soe ritsamp t no
eect was oser+ed or ineae tae 2 s a conseAence o the higher eecti+e water
disi+it the rit sitted trasond re-treatent wi dr aster dring the air-dring
stage i coared to the resh rit with no re-treatent igre 9 These
rests corroorates with the oser+ations o Fente-Banco et a 2006 and Fernandesamp
JaWo and Rodriges 2007 that the trasonic re-treatent aects the rit tisse
aing easier or water to dise dring air-dringamp ost roa de to the
oration o icroscoic channes in the rit
$trasond in Frit rocessing 119
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1730
Figre 9 e+eoent o the oistre content dring air-dring as a nction o rocessing tie or resh ananas no re-treatent and or ananas sitted to (0 intes o trasond re-treatent
T(e 2 E))e$ie wer di))siiy o) )ris sied o (rsoampd re-reeamp
gterating condition Eecti+e isi+it
2Ds
Regression R 2
Banana (Musa spp)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
128 10-9
108 10-9
17 10-9
11 10-9
098
099
099
097
Melon (Curcumis melo L)Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)00 10-9
6)0 10-9
62 10-9
697 10-9
099)
0989
0996
0998
Pineapple (Ananas comosus)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
9710-10
9210-10
)0010-10
8910-10
0999
0999
0999
099
Sapota (Achras sapota )
Fresh rit
ter 10 intes o trasond treatentter 20 intes o trasond treatent
ter (0 intes o trasond treatent
7(110-9
70910
-9
7(10-9
71210-9
0998
0997099
099)
Papaya (Carica papaya)
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
ter (0 intes o trasond treatent
)9010-9
)6610-9
)7210-9
)7610-9
0997
099)
0996
0996
Jenipapo (Genipa americana )
Fresh rit
ter 10 intes o trasond treatent
ter 20 intes o trasond treatent
1110-8
1910-8
1)610-8
0999
0997
099
120Sei Rodriges and Faiano N Fernandes
Jreater changes on eecti+e water disi+it dring the air-dring rocess was ond or
eons re-treated or (0 intes nder trasonic wa+es 697 10-9
2s
-1 The oser+ed
eecti+e water disi+it was (9L higher than the disi+it o the resh rit )00 10-9
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1830
2s
-1 and ()9L higher than the disi+it o oso-dehdrated eons )1( 10
-9
2s
-1
This higher eecti+e water disi+it oser+ed or eons a e reated to the rit tisse
strctre and the high oistre content o the rit which a aciitate the oration
o icro-channes
Bananas aso showed to e inenced the trasonic treatent and the eecti+e water
disi+it dring the air-dring rocess was ond to e higher when the ananas where re-
treated or 20 intes nder trasonic wa+es 17 10-9
2s
-1 re-treating the
ananassing osotic dehdration rested in a water disi+it o 1(7 10
-9
2s
-1 Both
disi+ities were higher than the disi+it otained or the resh rit 128 10-9
2s
-1 dring air-dring Fernandesamp Rodrigesamp Jasarettoamp and gti+eiraamp 2006 The
oser+ed eecti+e water disi+it ater aication o trasond was 18L higher
than the
disi+it o the resh rit and 7(L higher than the disi+it o oso-dehdrated ananas
This enhanceent oser+ed in the eecti+e water disi+it or ananas was ower than or
eons and a e reated to the higher densit and the ower oistre content o ananas
which a rest in ewer icro-channes or in icro-channes on near the srace o the
rit This theor sti has to e checed icrohotograh anasis
The trasond re-treatent aected sight the eecti+e water disi+it o
ineaes dring the air-dring rocess tae 2 These dierences show that the eect o
trasond a e deendent on the strctre o the rit ce tisse Frther stdies with ight
icrosco wi e carried ot with these rits to e+aate the eect o trasond in the ce
strctre and wh soe rit are ore aected than others regarding water ossamp sgar gain
and eecti+e water disi+it
There sti no henoenoogica atheatica ode to descrie the changes in eecti+e
water disi+it as a nction o the tie sent in trasond and on an eirica
correation can e ond For ananas the eecti+e water disi+it can e correated EA7
= (769 minus 0008) sdot t + 0007( sdot t 2
minus 000020) sdot t $( )sdot 10
minus8
7
whereamp is the eecti+e water disi+it 2Ds and t$ is the tie sent nder trasonic re-
treatent in
Pro$essiamp Tie 3Pre-Treeamp 4 Air-Dryiamp5
The ain oPecti+e o a re-treatent is to redce the tota rocessing tieamp secia the
air-dring tie Tae ( shows that when trasonic re-treatent was sed the tota
rocessing tie air-dring V trasond was ower than when the resh rit was air-dried
withot an re-treatentamp showing that the trasond re-treatent is eicient in redcing
the tota dring tieamp ecet or ineaes where no eect was oser+ed
Chen trasond was aied to ananas dring 20 intes the tota rocessing tie
redced 86 intes a 10(L redction or ananas dehdrated to a ina oistre content
$ $
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 1930
$trasond in Frit rocessing 121
o 00) g waterDg dr soids Fernandes and Rodrigesamp 2007 For eons the redction in
tota rocessing tie was e+en higher and when trasond is aied or (0 intesamp the tota
rocessing tie to dehdrate eons to a ina oistre content o 0) gwaterDgdr soids wi
e redced 200 intes a 26L redction These redctions are considerae and ae to
redce the rocess cost The se o trasond with ineaesamp howe+eramp showed an increase
in tota rocessing tie and thereore this re-treatent is not sitae or this rit
T(e + To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 o $iee oisre $oampeamp
o) 667 o) wer er r o) dry so(ids )or ampamps ampd e(oamps ampd 127 o) wer er
r o) dry so(ids )or iampe(es
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
8(980(
7)(
791
---10
20
(0
8(979(
7((
761
Melons ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water
20 intes o trasond distied water
(0 intes o trasond distied water
81
6(6
6)
61
---
10
20
(0
81
626
6(
)8
Pineapples ndash inal moisture content $ o ampater $ o ry solis
No re-treatent air-dring on
10 intes o trasond distied water20 intes o trasond distied water
(0 intes o trasond distied water
7(
7()1(
))0
---
1020
(0
7(
6(9(
)20
Oii8ioamp
The dring rocess o rits and +egetaes considered herein corehends the
re- treatent rocess oowed air-dring Tota rocessing tie can e otii3ed to
redce the dring rocess to a iniamp which can redce costs and increase
the o+era rodcti+it To otii3e the rocess consisting o trasonic treatent and
air-dringamp the trasonic treatent shod e carried ot whie the increase in water
disi+it it ro+oes eading to a continos redction o tota rocessing tie igre 10
122
Sei Rodriges and Faiano N Fernandes
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2030
Figre 10 Istrati+e schee o the de+eoent o water disi+it o the rit and tota rocessing tie asa nction o tie sitted to trasond The arrow indicates the oti eriod that the ananas shod
e sitted to trasonic ath rior to air-dring to inii3e the tota rocessing tie
The otii3ation can e carried ot sing the ethod o e+energ-=arAardt or
eAi+aent otii3ation ethodamp setting the oPecti+e nction to inii3e the
tota rocessing tie It is iortant to +aidate the atheatica odes sed in the
otii3ation rocedre sing the F-test as a criterion to +aidate the odes The e+e o
conidence o the ode is estaished coaring the isted F-+aes and the cacated F-
+aes or each oerating condition e+es o conidence ao+e 90L are desired ter
+aidationamp the ode can e sed to otii3e the tota rocessing tie to dr the rit
trasond oowed air-dring
Tae shows the est oerating conditions that shod e sed in the rocessing
o ananas and eons when sitted to the trasonic re-treatent sing distied water as
the iAid edi
T(e 9 Oi( ro$essiamp ies 3re-reeamp 4 ir-dryiamp5
)or ampamp ampd e(oamp ro$essiamp
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
Bananas ndash inal moisture content $ o ampater $ o ry solis
78 22 726
Melons ndash inal moisture content $ o ampater $ o ry solis
61 (0 )8
+2 U(rsoampd-Assised Osoi$ Deydrioamp
gtsotic dehdration is the ost reorted re-treatent sed rior to air-dring
The techniAe consists in iersing the rit in hertonic sotion to artia reo+e
water ro the rit The dri+ing orce or water reo+a is the dierence in osotic
ressre etween the rit and the sotion where the coe cear strctre o the rit
acts as a
$trasond in Frit rocessing 12(
sei-ereae erane Raotamp aontamp Riosamp and Jiertamp 1989 Torreggianiamp 199(
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2130
Fitoamp 199 Raot-Cacamp 199 rohararamp rasadamp and asamp 1997 Rastogi and Ragha+araoamp
1997 Rastogi and NiranPanamp 1998 Siaamp Beneditoamp SHnche3amp and Roseoamp 1998 Rastogiamp
Eshtisghiamp and norramp 1999 or3o and Je3amp 200
$trasond can e sed to enhance water reo+a dring osotic dehdrationamp eneiting
ro the icroscoic channes created the aication o trasond which a
ease oistre reo+a
Prerioamp o) S(es
The rearation o rit or +egetae saes shod e done sing the sae rocedre as
descried earier or trasond re-treatent Section (1
Osoi$ So(ioamp
The osotic sotion shod e reared iing ood grade scrose with
distied water to gi+e the desired sgar concentration gtther sgars sch as annitoamp
rctoseamp gcose and others can aso e sed in sstittion to scrose
=ost stdies and indstria rocesses se osotic sotions ranging ro (0 to 70QBri
s the sgar concentration increases the osotic ressre gradient etween the rit and the
osotic sotion increases o+e )0QBri the dissotion o sgar in the osotic
sotion ecoes diict and ast dissotion is on achie+ed throgh heating and
+igoros stirring
o the osotic sotion
Ternar osotic sotions consisting o a sgar and sat genera sodi choride
or otassi choride can aso e sed and in this case the sat content shod not eceed )Lo the tota sotion weight otherwise the dried rit ecoes sat
U(rsoampd-Assised Osoi$ Deydrioamp
The saes shod e iersed in an osotic sotion and sitted to trasonic
wa+es dring a eriod o tie The rocess can e carried ot nder aient teeratre or
at higher teeratresamp since higher teeratres a enhance the ass transer o water and
soe soids etween the rit or +egetae and the osotic sotion
The rocess can e carried ot acing the saes in an trasonic ath or acing the
saes in a +esse sing an trasonic ti to indce the trasonic wa+es inside the +esse No
echanica agitation is reAired The trasond reAenc shod e etween 2) and
100 lt3 and intensit ao+e 000 CD2
=ost reorts on osotic dehdration eo an osotic sotion to rit ratio ro 1 to
201 weight asis In trasond-assisted osotic dehdration the osotic sotion to rit
weight ratio shod reain as ow as ossieamp otherwise the reAired trasond
ower increases to ott an trasond intensit etween 000 and )000 CD2
ter reo+a ro the sotionamp the dehdrated saes ro each gro shod e
drained and otted with asorent aer to reo+e the ecess sotion To cacate water
12
Sei Rodriges and Faiano N Fernandes
oss dring the trasonic-assisted osotic dehdration the oistre content o the rit has to
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2230
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2330
70QBri and (0Q
The water oss oser+ed when sing trasond-assisted osotic dehdration was sight
ower at ()QBriamp t was )0L ower when a 70QBri osotic sotion was sed The ower
water oss oser+ed at 70QBri was inenced the higher incororation o sgar
the rit which has decreased signiicant the concentration gradient etween the
osotic sotion and the rit
ccording to Fito 199 and Shi and Fito 199 when the osotic dehdration is
carried ot nder +ac the gas that occies the ores o rits and +egetaes is reo+ed the aication o ow ressre This redction in ressre cases the eansion and
escae o the gas occded in the ores Chen ressre is restoredamp the ores can e occied
the osotic sotion increasing the soe soids content o the sae The ca+itations
ro+oed the aication o trasond a aso case the eansion and escae o the gas
occded in the ores which ater on are occied with the osotic sotion In additionamp the
icro-channes ored dring trasond aication a aso aciitate the ass transer o
soe soids into the sae
Stdies on trasond-assisted osotic dehdration o aes +ar Joden carried ot
Siaamp Beneditoamp SHnche3 and Rosse 1998 showed that sgar gain was not deendent on
teeratre whie water oss was The high orosit o aes a+ored the incororation o
sgars when trasond was aied and ater (0 intes the sgar gain was 1)L tae 6amp
which was ch higher than the sgar gain oser+ed or osotic dehdration withot
aication o trasond 88L at 0Q and 128L at 60Q The se o trasond ecae an
ad+antage or water oss on ater 1 hor o aication when the water oss oser+ed
or trasond-assisted osotic dehdration was 87L higher than the water oss
oser+ed or traditiona osotic dehdration tae 6
T(e Sr iamp ampd wer (oss )or (es sied o osoi$ deydrioamp ampd
(rsoampd-ssised osoi$ deydrioamp siamp amp osoi$ so(ioamp o) 6ltBri= 3Si(0Beampedio0 Sgtamp$e8 ampd Rosse((0 15
gterating condition Sgar Jain L Cater oss L
+ltrasoun-assiste osmotic ehyration
10 intes 0Q
(0 intes 0Q
60 intes 0Q
10 intes 60Q
(0 intes 60Q
60 intes 60Q
89
1)
19(
89
1)
19(
192
270
(61
229
(
6(
smotic ehyration
(0 intes 0Q
60 intes 0Q
(0 intes 60Q
60 intes 60Q
88
107
128
160
296
((2
(60
00
ased on eAation 6
126
Sei Rodriges and Faiano N Fernandes
ode(iamp o) e ss Tramps)er Peampoeamp
Three atheatica odes or osotic dehdration re-treatent are resented in
the iteratre and can e sed to ode trasond-assisted osotic dehdration Ficianamp
eegs and =ass transer ode
The Fician ode Fito and hiratamp 1997 asses that the ain ass transer
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2430
echanis dring osotic dehdration is disiona in natre and sae deoration and
shrinage dring dring can e considered negigie The disiona water and sote
coeicients are considered eecti+e araetersamp as a rest o a the transort
henoena that cod tae ace dring the rocess The ode asses that the disi+it
coeicients are eecti+e araetersamp constant and nioramp and aso asses an isotroic
eha+ior o the soid with regard to water and sote dision s sch the ass transorts
can e descried
Fics aw in an nstead state ass aanceThe Fician ode can e so+ed anatica assing that the sae +oe reains
constant throghot the rocess and that the initia soe soids content o the saes is
aso negigie For a araeeiedic shae sae
lt minus lt8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot eminus (2 sdot + 1) sdot
w
8 lt 0 minus lt e 2
=0 (2 sdot + 1)2
⎣
sdot 2
⎥
minus 8 infin 1 ⎡2 (
2sdot
sdot t ⎤ e = sdot sum sdot e
minus (2 sdot + 1) sdot s
90 minus e
2=0 (2 sdot + 1)
2
⎣
sdot 2
⎥
whereamp is the soe soids concentration gD( 0 is the initia soe
soids concentration gD( e is the eAiiri soe soids concentration gD
(
S
is the eecti+e disi+it o the soids 2Ds
Cis the eecti+e water disi+it
2Ds lt is the
oistre content o the saeamp lt0 is the initia oistre content lte is the eAiiri
oistre content is the height o the sae and t is the tie s
eegs ode 1988 is sed to descrie the osotic dehdration cr+es in soe
ished aers 3oe and =rramp 200 E-oaramp 3oeamp and =rramp 200( ar et aamp
2002 eegs eAation resents a satisactor itting or water oss This two araeter
ode descries ost o the ished cr+es which aroach eAiiri astotica
aoamp oe3-=aoamp rgai3amp and Cetiamp 199(
= = =0
t
1 + 2 sdot t
plusmn
⎢
⎦
⎢
⎦
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2530
10
whereamp = is the water or soids aont at instant t g =0 is the initia water or soids
aont g 1 and 2 are the eegs araeters and t is the tie s
The =ass transer ode taes into accont the ass transer etween the rit or
+egetae and the iAid edi distied water or osotic sotion The ass aance or
the sae rit or +egetae incdes the ass transer o water ro the sae to
the
$trasond in Frit rocessing 127
osotic sotion and the ass transer o sgar andDor sat ro the osotic sotion to the
sae
d= C
FR = minus C
sdot
sdot ( C
minus C
)sdot 11
dt FR FR
gtS FR
d=S
FR= minus
S sdot
sdot (S
minus S
)sdot
12dt
FR FR
gtS FR
whereamp FR is the sae sericia area 2amp FR
Sis the soe soids concentration o the
rit gD(amp FR
Cis the water concentration o the rit gD
(amp gtS
Sis the soe soids
concentration o the osotic sotion gD(amp gtS
Cis the water concentration o the osotic
S 2 Csotion gD(amp is the ass transer coeicient o soe soids 1D samp is the
ass transer coeicient o water 1D2samp =FR
Sis the ass o soe soid o the rit gamp
=FR C is the ass o water o the rit gamp and FR is the +oe o the rit (ring the dehdration rocess the sae a shrin and this henoenon has to e
considered the atheatica ode to increase the accrac o the ass transer
coeicients In the odeamp the shrinage eect is set to e roortiona to the water
ass change in the saeamp according to eAation 6 The sae sericia area is
assed to decrease at a roortiona rate oowing the decrease in +oe o the sae
dB langd=
C FR
= sdot
FR
1( dt rangC dt
whereamp lang is the shrinage actoramp and rangC
is the densit o water gD(
The ass aance or the iAid edi incdes the gain o water that is reo+ed ro
the sae and the oss o sgar to the sae s the ateria aances are ased on ass
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2630
aancesamp the aont o water ea+ing the sae is eAa to the aont o water entering the
iAid edi The oosite occrs with the ass aance o sgaramp where the
aont o soids entering the sae is eAa to the aont o soids ea+ing the iAid
edi
d= C
d= C gtS
= minus FR
1dt dt
d= S
d= S gtS
= minus FR
1)dt dt
dB 1d=
C
gtS
= sdot
FR
16dt rang C dt
whereamp =gtSS
is the ass o soe soid o the osotic sotion gamp =gtSC
is the ass
o water o the osotic sotion gamp and gtS is the +oe o the osotic sotion (
128
Sei Rodriges and Faiano N Fernandes
To estiate the ass transer coeicients o the trasond-assisted osotic dehdration
eerienta data shod e gathered and sed with a araeter estiation rocedre ased
on the inii3ation o the error s o sAares The ode is so+ed nerica integration
sing the Rnge-tta ethod or siiar integration techniAe
The ass transer coeicients otained or the eerients carried ot with ineaes
are resented in tae 7 Ecet or the treatent carried ot with distied water as the iAid
ediamp the =ass transer ode reresents +er we the data oints as shown in igre 11
and throgh the regression errors The F-+aes cacated or a eerients were ao+e the
isted F-+aes coniring the +aidit o this ode within a 9)L e+e o conidence
T(e ss ramps)er $oe))i$ieamps )or e (rsoampd-ssisedosoi$ deydrioamp o) iampe(es
iAid edi =ass Transer
oeicient or
Cater
1Dh2
=ass Transer
oeicient or
Soids
1Dh2
R 2
F-
test
istied water
Scrose sotion
()QBri
Scrose sotion
70QBri
128
()6
82
870
86
2106
07)2
0991
099)
26
1066
96(
isted F-test 18) or 9)L e+e o conidence
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2730
Figre 11 Norai3ed water and sgar content or ineaes sitted to trasond re-treatent at (0Q
The ass transer coeicient o water or ineaes resented an aost
inear reationshi with the concentration o scrose in the iAid edi going ro
12 h-1
-2
when distied water was sed to 800 h-1
-2
when an osotic sotion o
70QBri was
$trasond in Frit rocessing 129
eoedamp which was eected ased on the arger osotic ressre gradient etween
the rit and the osotic sotion The ass transer coeicient o scrose did not
show signiicant change when distied water and an osotic sotion o ()QBri was
eoedamp t increased 2) od when an osotic sotion o 70QBri was sed
Pro$ess Oii8ioamp
The dring rocess o rits and +egetaes corehends the trasonic-assisted osotic
dehdration rocess oowed air-dring Tota rocessing tie can e otii3ed in order to redce the dring rocess to a iniamp which can redce costs and increase the o+era
rodcti+it To otii3e the rocessamp the osotic dehdration shod e sed whie
the water oss rate o the sae is higher than the rate that wod e otained the air-
dring rocess Chen the water oss rate in the trasond-assisted osotic dehdration
ecoes ower than the rate that wod e otained in the air-dring rocessamp then the
sae shod
e transerred ro the osotic dehdration to the air-dring eAientamp where the sae
shod sta ti dring is coeted igre 12 The otii3ation can e carried ot ased on
the estiated araeters or the trasond-assisted osotic dehdration rocess and the air-
dring rocess
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2830
Figre 12 Istrati+e schee o the water reo+a rate in trasond-assisted osotic dehdration and air-
dring and the oti tie to change ro osotic dehdration to air-dring
Tae 8 shows the tota rocessing tie to achie+e a ina oistre content o 12) g o
waterDg o dr soids or ineaes sitted to trasond-assisted osotic dehdration In
this case the se o trasond-assisted osotic dehdration redced the tota dring tie In
this caseamp the high water oss oser+ed dring the re-treatent and the high ass o
dr soids redces the oistre content o the rit in dr soids asis and the ina
oistre content is ore raid achie+ed The owest tota dring tie or ineaes was
oser+ed1(0
Sei Rodriges and Faiano N Fernandes
when the re-treatent was carried ot dring 20 intes sing an osotic sotion o
70QBriamp condition which redced the tota dring tie in 21 intes and the air-dring tie
in 1 intes The rests or the trasond-assisted osotic dehdration showed that
the tota dring tie tend to increase with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o $iee )iamp( oisre $oampeamp o) 127 wer dry so(ids
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in
No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
62
8(
89
))
)2
6(
---
10
20
(0
10
20
(0
7(
)2
6(
)9
)
(2
((
Tae 9 shows the tota rocessing tie to reo+e 80L o the initia water contento
ineaes redcing the oistre content o the rit 067 g o waterDg o resh rit The
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 2930
se o trasond-assisted osotic dehdration showed not to e a +iae rocess to reo+e
arge Aantities o water ro the rit s resented in tae 9amp the trasond-
assisted osotic dehdration was not ae to redce the air-dring tie at an o the
conditions that were stdied thogh this re-treatent resents high water ossamp the
incororation o sgars into the rit increases the soid content o the rit ltigh ass o
dr soids redces the oistre content o the rit and the oistre content gradient Fics
aw s schamp i the oPecti+e o the dring rocess is to redce the initia water content in
80L as an eae it wi ha+e to reo+e oistre strong attached to the sgar incororated into the rit increasing the tie reAired or dring The rests or the
trasond-assisted osotic dehdration showed that the tota dring tie increased
with increasing sgar gain the rit
T(e To( ro$essiamp ie 3re-reeamp 4 ir-dryiamp5 )or iampe(es o reoe
6 o) e iampii( wer $oampeamp o) e )ri
Tota
Tie
in
re-treatent
Tie
in
ir-ring
Tie
in No re-treatent air-dring on
10 intes o trasond ()QBri
20 intes o trasond ()QBri
(0 intes o trasond ()QBri
10 intes o trasond 70QBri
20 intes o trasond 70QBri
(0 intes o trasond 70QBri
7(
)77
)88
68)
)9)
6))
677
---
10
20
(0
10
20
(0
7(
)67
)68
6))
)8)
6()
67
$trasond in Frit rocessing 1(1
CONCLUSIONS
The se o trasond in the ood indstr is increasing as we as the se o trasond in
rit rocessing $trasonic rocesses are sti nder de+eoent and ore stdies are
reAired to corehend the eects o trasond not on in the rit tisse t aso in
soe sensor characteristics sch as tetreamp adhesi+eness and other Recent stdies
ha+e shown a good otentia o trasonic treatents
For ost rits stdied the se o trasond re-treatent increased the water disi+it
o the rit eading to aster air-dring o the rit This henoenon a haen de to the
rocess o oration o icro-channes dring the aication o trasondamp henoenon that has to e rther stdied to nderstand how the icro-channes are ored
and how the ce erane and rit ce strctre change dring the rocess The
increase in water disi+it at the air-dring stage aes the se o trasond as a re-
treatent an interesting ethodoog coeentar to cassica air-dring
Frits re-treatent with trasonic wa+es resented in soe cases signiicant oss
o sgars and thereore the rocess can e aied to rodce dried ow sgar rit that can
e eoed in oodsts with redced caories
ACKNOLEDGEENTS
The athors than r =arisa Narciso Fernandes ro $ni+ersidade Federa de
SWo aros or aowing the se o the icrosco sste r =aria I3ae JaWo
ro $ni+ersidade Federa do earH or the he with the rearation o the ainas
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411
8102019 Ultra Sound game
httpslidepdfcomreaderfullultra-sound-game 3030
R EFERENCES
gt 1990 icial methos o analysis Cashington ssociation o gticia natica
heists
hedamp F I amp and Rsseamp 197) Snergis etween trasonic wa+es and hdrogen
eroide in the iing o icro-organiss Journal o Applie Bacteriolo$yamp amp (1-0ingeramp lt 197) $trasonic disrtion American Laoratoryamp amp 7)-8)
eamp R E 1981 $trasonics In Edonds Ed =ethods o eerienta hsics
New Xor cadeic ressamp o 19amp ()6411
3oeamp =amp and =rramp F E O 200 =ass transer inetics o osotic dehdration o
cherr toato Journal o oo 0n$ineerin$ amp 1amp 291429)
Barantiamp amp =astrocoaamp amp and Se+erineamp 199 ring o s coarison aong
twe+e cti+ars Sciences es Alimentsamp 2amp 61-7(
Bocheramp R =amp and echowichamp R 1979 $trasonics too to iro+e iocida
eicac o steriants or disinectants in hosita and denta ractice Canaian Journal
o Pharmacolo$ical Scienceamp 2amp 1-12Bstaadamp gt = 1999 Ceight oss dring ree3ing and the storage o ro3en eat Journal
o oo 0n$ineerin$ amp 2amp 1411