Wastewater_reuse_final.ppt

8/9/2019 Wastewater_reuse_final.ppt

1/36

Wastewater Reuse:Selected Applications


2/36

Wastewater PlantStandards

Some states have guidelines,some have regulations

Washington has guidelines EPA Suggested Guidelines pH !"#

$%&' ( )* mg+ -ur./ ( 0 1-2

E/ coli 1%1E

Res/ 3l04 ) mg+


3/36

EPA Guidelines

2r.an Reuse

Restricted"Access"Area 5rrigation

Agriculture Reuse Recreational 5mpoundments

andscape 5mpoundments

3onstruction 2ses 5ndustrial Reuse

Groundwater Recharge

5ndirect Pota.le Reuse

&isin6ected, -ertiar7-reated E8uent can

.e used in all o6 theseApplications


4/36

Secondar7 E8uent


5/36

3omplete -reatment

E9pensive

;ilter can .e several units 3hemical Addition depends on SE


6/36

&irect ;iltration

1o clari


7/36

3ontact ;iltration

1o ;loc Step, 1o 3lari


8/36

How E?ective@

Constituent

After secondarywith BNR plus

disinfection

After secondarywith BNR plusdepth filtration

and disinfection

After secondarywith BNR plusmicrofiltration, ROand disinfection

SS !"#$ %"& ' %

BO( !"#$ %"! $"#

N #"%# #"%# ' %

NO) %"%$ %"%$ ' %

*hosphorus $+%"$+! $+%"$+! ' $+!

uridity #"- ' # $+% "%

Bacteria #+#"#&$ ' #+# . $

*roto/oan !"%$ ' % . $

0iruses %$$"%$$$$ ' +$$$% . $


9/36

Agricultural Reuse o6Wastewater

%ne o6 the most signi


10/36

$ene


11/36

&isadvantages o6Agricultural Reuse

Health ris> 6rom associated pathogens

Health ris> 6rom other contaminantsDe/g/ metals, chemicals,pharmaceuticals

&ecrease in soil =ualit7 6romaccumulation o6 metals and

acidi


12/36

Agricultural Reuse inWashington

;oods consumed raw sur6ace irrigation: water re=uires o9idation

and disin6ection with mean total coli6orms

I 0/0+)** ml spra7 irrigation: water re=uires o9idation,coagulation,


13/36

2r.an Wastewater Reuse

What is rec7cled ur.an wastewater or

reclaimed water@

2r.an wastewater that has undergoneadditional treatment 6ollowing secondar7

treatment in order to .e reused rather than

discharged into the environment

3an reduce strain on pota.le water

suppl7


14/36


What can ur.an reclaimed water .e used6or@ 5rrigation " pu.lic par>s, schools, road medians,

an7 landscaped areas, gol6 courses

3ommercial " vehicle washing 6acilities, laundr76acilities, window washing, mi9ing pesticidesand her.icides

3onstruction " dust control, concrete production

-oilet and urinal Kushing ;ire protection

&rin>ing water@@ in Australia, not 7et in the2/S/


15/36


A reclaimed water systemconsists o6:

Water reclamation 6acilit7 "provides treatment in addition tosecondar7 treatment

&istri.ution s7stem " includespipelines, storage 6acilities,pumping 6acilities


16/36


Reclaimed water distri.ution s7stem isa dual distribution system

1etwor> o6 pipes to deliverreclaimed water to the pu.lic

Run separate .ut parallel to pota.lewater pipelines

Potential pro.lem@@@@

CROSS CONNECTIONS!!!


17/36


aLor considerations are pu.lichealth and relia.ilit7 o6 the s7stem

Water must .e o6 accepta.le =ualit76or intended uses

S7stem must .e maintained andoperated properl7

Reclaimed water pipes must .eclearl7 mar>ed


18/36


Retro


19/36


St/ Peters.urg, ; 2sing reclaimed water s7stem since )#JJ

Provides 6or residential M commerical

properties, .ase.all stadium, schools San &iego, 3A

Ponoma, 3A Serves 3A Pol7technic 5nstitute, paper mills

Austin, -N

-ucson, AO


20/36

2r.an Wastewater Reuse5n the news

3ali6ornia count7 turns to sewer water toincrease drin>ing supplies

5nternational Herald -ri.une, 1ov/ 0J, 0**J

Q%n ;rida7, the %range 3ount7 Water &istrict will turn onwhat industr7 e9perts sa7 is the worlds largest plantdevoted to puri67ing sewer water to increase drin>ing watersupplies/ -he7 and others hope it serves as a model 6orauthorities worldwide 6acing persistent drought, predictedwater shortages and proLected growth/

QSan Tose"area water o?icials announced a stud7 o6 the issuein Septem.er, water managers in southern ;lorida approveda plan last wee> calling 6or a.undant use o6 rec7cledwastewater in the coming 7ears in part to help restoc>drin>ing water supplies, and planners in -e9as are giving it

serious consideration/


21/36

Residential WastewaterReuse

Wh7 reuse wastewater at home@

3onserve precious drin>ing water suppl7

&roughts

Arid climates%veruse or population overwhelming suppl7

Save mone7

Reduce environmental impact associatedwith wastewater treatment M disposal


22/36


Gre7water:

Wastewater 6rom sin>s, .athtu.s,showers, dish washer, laundr7 Dan7thing

e9cept toilets a7 contain pathogens, li>el7 to contain

other micro.es, detergents, ;%Gs, .leach,hair, 6ood particles, suspended solids

1ot 6or pota.le reuse unless tertiar7treatment


23/36


Simple home water reuse:

3ollect warming tap water in .uc>et

Hose 6rom sin> drain to outdoorsplanter .o9

ore comple9 home water reuse:

&ivert gre7water to undergroundlawn+garden irrigation s7stem

3ommercial treatment M reuse s7stems


24/36

Residential WastewaterReuse3ommerciall7 availa.le gre7water treatment M rec7cling


25/36

Residential WastewaterReuse3ommerciall7 availa.le gre7water treatment M rec7cling


26/36


3ustom designed s7stem in S7dne7, Australia


27/36


Health7 Home S7stem in -oronto, 3anada


28/36

Groundwater Recharge

California

FloridaSource: 2S EPA/ Guidelines 6or water


29/36

Groundwater Recharge "Purposes

esta.lish saltwater intrusion .arriers

provide 6urther treatment 6or 6uture

reuse increase pota.le or nonpota.le a=ui6ers

provide storage o6 reclaimed water 6or

su.se=uent retrieval and reusecontrol or prevent ground su.sidence


30/36

ess cost than e=uivalent sur6ace waterreservoirs

-he a=ui6er serves as an eventualnatural distri.ution s7stem

1o evaporation, taste and odor

pro.lems occurred in sur6ace reservoirsSuita.le sites 6or sur6ace waterreservoirs ma7 not .e availa.le or

environmentall7 accepta.le

Groundwater Recharge "Advantages


31/36

E9tensive land areas ma7 .eneeded 6or spreading .asins

3osts 6or treatment, water =ualit7monitoring, andinLection+in


32/36

1ot all recharged water ma7 .erecovera.le

H7drogeologic uncertainties ma7reduce the e?ectiveness o6 therecharge proLect in meeting watersuppl7 demand

5nade=uate institutional arrangementsor groundwater laws ma7 not protectwater rights

Groundwater Recharge imitations D0


33/36

Source: 2S EPA/ Guidelines 6or

Groundwater Recharge -echni=ues


34/36

-reatment %9idied, coagulated,


35/36

3onclusions

an7 current uses 6or rec7cledwastewater

ar7ing levels o6 treatment re=uired

Pros: 3onserve pota.le water

Reduce e8uent to environment

3ons: Health M sa6et7 precautions necessar7 3are6ul planning needed

Potential 6or much greater use in 6uture


36/36

Xuestions@

Wastewater_reuse_final.ppt

Documents

Transcript of Wastewater_reuse_final.ppt