WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and ...
-
Upload
adbwaterforall -
Category
Documents
-
view
218 -
download
0
Transcript of WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and ...
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 1/99
WASTEWATER MANAGEMENT TECHNOLOGIES
MODERN TRENDSw ith Integrated Aspectson Wastewater treatment (liquid phase)
and Associated Sludge Treatment Optimization
ADB – MANILA – November 18th, 2011Alain MEUNIER - Degrémont
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 2/99
TWO Main Aspects in a WASTEWATER TREATMENT PLANT
•
for the Environmental ProtectionGenerally rejected to the receiving body
River Lake Ocean
It is very Surface consuming
very Energy consuming
Modern trends: to reduce SURFACE
to reduce ENERGY
ADB - MANILA – November 18th, 2011 2
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 3/99
TWO Main Aspects in a WASTEWATER TREATMENT PLANT
•
Huge quantities of Dry Solids to be processed1 Million Inhabitants = approx. 40 T/day of dry solids after digestion
60 T/da if not
or 160 T/day of cake at 25% drynessi.e. 60,000 T per year
How to manage such big quantities of solids, highly organic?
oLOCAL STRATEGY
ADB - MANILA – November 18th, 2011 3
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 4/99
DESIGN of WWTPs TWO DIFFERENT WAYS
VALENTON (City of Paris) – Stage 1 NICE (French Riviera)
ADB - MANILA – November 18th, 2011 4
220,000 m3/d300,000 m3/d
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 5/99
DESIGN of WWTPs TWO DIFFERENT WAYS
LA FARFANA – Santiago de Chile1 million m3/d
PARIS – Colombes (France)DWF 240 000 m3/d – WWF 1 million m3/d
ADB - MANILA – November 18th, 2011 5
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 6/99
DESIGN of WWTPs TWO DIFFERENT WAYS
CAIRO (Gabal El Asfar) EGYPT600,000 m3/d
BUSAN KOREA126 000 m3/d
ADB - MANILA – November 18th, 2011 6
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 7/99
DESIGN of WWTPs TWO DIFFERENT WAYS
60,000 m3/d
Panama City – 1 million inhabitants
240,000 m /
ADB - MANILA – November 18th, 2011 7
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 8/99
MODERN TRENDS for WASTEWATER (Liquid Phase) TREATMENT
COMPACTNESS with all associated benefits starting from impactson t e a n nterceptors
A revolution in the concept of the Network/Wastewater Treatment Plant (WWTP)
Optimization
REUSE of Treated Wastewater for Irrigation, Industries …
Ultrafiltration Membranes A new Driver for Reuse Applications(UF)
but very Site Specific Local water needs, public acceptance,environmental strategy
ADB - MANILA – November 18th, 2011 8
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 9/99
Conclusions on COMPACTNESS
CONSIDER All significant benefits linked to compactness
“nuisances zero” WWTP in concentrated urban areasHuge savings concerning INTERCEPTORS
COMPACTNESSIt is in the Histor DirectionENCOURAGE To consume few land and to protect future.Encourage the direction by introducing bonuses in therules of the game (Tender specifications)
xamp e ase on cos o an :Bonus of X millions $ per hectar saved
ADB - MANILA – November 18th, 2011 9
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 10/99
COMPACTNESS is a FANTASTIC DRIVER for DESIGN OPTIMIZATION
Requirements
& Associated Costs
PossibleConstruction of
Reduction of Nuisances(Noise, Odours)
COMPACTNESS WWTPsin
City Centers
Arc i tecturaIntegration
Significant
savingsin Main
Compact WWTPs require 2 to 5 times
Interceptors
ADB - MANILA – November 18th, 2011 10
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 11/99
Overview of COMPACT TECHNOLOGIES & PROCESSES
• HIGH RATE SETTLING TANKS Inte ration of Lamellar Modules
with activated sludge (Suspended Growth Biomass)
with attached Growth Biomass
ADB - MANILA – November 18th, 2011 11
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 12/99
Overview of COMPACT TECHNOLOGIES & PROCESSES
HIGH RATE SETTLING TANKS Use of Lamellar Modules
Conventional Primary
Sedimentation Tanks
Primary
Sedimentation
Tanks (PSTs) with
Lamellar Modules
(PSTs)
Hydraulic loading at Peak Flow = 3 to 5 m3/m2.h 20 m3/m2.h(1) No coagulant/flocculant30 to 70 m3/m2.h (1) with coagulant / flocculant
ADB - MANILA – November 18th, 2011 12
(1) m² of horizontal surface
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 13/99
HIGH RATE PRIMARY SEDIMENTATIONDENSADEG
Flocculation:mixing tank: mixing of the polymerplug tank: the flocs become heavier
Clarification:heaviest flocs settlelightest flocs are retained in the lamellae
Coagulation:formation ofthesmall flocs
TreatedwaterRaw
Sludge recirculation:it improves the flocculation
Thickened sludgeextraction
ADB - MANILA – November 18th, 2011 13
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 14/99
The Most SURFACE CONSUMING Stage
The biolo ical treatment : 60 to 70% of the total area
Possibilities of Surface reduction with Processes based on ACTIVATED SLUDGE BIOMASS
uspen e row
- Using rectangular works mainly for
final sedimentation tanks and
- Cancelling the final sedimentationtanks and replacing it with UFMembranes (MBR)
ADB - MANILA – November 18th, 2011 14
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 15/99
The Sequential Batch Reactors (SBRs)
Biological Reactors operating with Activated Sludge
combinin Aeration and Sedimentation b Sequencing the different phases
A Cycle:
- Complete Biological Treatement ofCarbon-Nitrogen / Phosphorus ifrequired
• Fill-Aeration
» carbon removal
» nitrification» denitrification
- Possible rectangular “Boxes”
• Settling
» clarification
» denitrification
• Draw off
- It can e eas y p e upBangkok, Dublin,Le Havre (France) …
»
» denitrification
TreatedWater
ExcessSludge
ADB - MANILA – November 18th, 2011 15
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 16/99
Example of a 4 Periods Cycle with a CYCLOR*
4 periods cycle
Cell 1 FA DSFA
er o er o er o er o
Cell 2 DS FAFA
e
Cell 4
FAFA
FA FA
S
S D
D
FA: Fill, Aeration 1h05x2=2h10S: Settling 1h05D: Draw off 1h05
ADB - MANILA – November 18th, 2011 16
* Degrémont Process
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 17/99
It requires a Treated water discharge reliable device
,
Float and discharge pipe Operation
FILL / AERATION / SETTLINGSEQUENCES
No Incoming Flocs
DRAW OFF
No Floating Scum incoming the outlet
No Suction of the Activated Sludge Bed
ADB - MANILA – November 18th, 2011 17
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 18/99
The MEMBRANE BIOREACTORS
Activated sludge is separated from interstitial treated water by
Fibres areassembled in
elements
- No final sedimentationvery significant surface gain
Elementsare grouped
- qua y o rea e wa erin SS, Turbidity, Faecal Coliforms,Phosphorus, SDI
in
cassettes - Ideal for Reuse Applications inIrrigation or Combined with DownstreamReverse Osmosis (R.O.) if TDS reductionrequested
ADB - MANILA – November 18th, 2011 18
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 19/99
The MEMBRANE BIOREACTORS
y enon e rocess
Outside – inhollow fibre
Pollens Yeasts
Bacteria Virus
Colloids
Dissolved salts
Organic macro Molecules
Wastewater
. …
... …..Screening
Biological Reactor withconventional Activated Sludge*
100 µm 10 1 0,1 0,01 0,0010,0001
Hair Redglobulae
Smallestmicro-organism
Reverse osmosis
Nanofiltration
UltrafiltrationSand filter
.. . ..
..
. .. .
..
.. . ..
..
. .. .
..
Membrane
Treated
water for
backwash
Nominal pores diameter: 0.035 µm
Microfiltration
Sludgetreatment
s aeration
* But with h igh MLSS 7 -8 g/L
Many other Manufacturers: Puron – Koch – Siemens
ADB - MANILA – November 18th, 2011 19
and other Membrane types: Plate Membranes ofKubota, Toray
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 20/99
Some CASES
Paris North / La Morée60,000 m3/d
ADB - MANILA – November 18th, 2011 20
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 21/99
Some CASES
– renc v era : , n a an s
- Membrane BIOREACTORs
-Thermal drying for Sludge Treatment: Granulates to cement plant
ADB - MANILA – November 18th, 2011 21
- Buildings with positive Carbon print: 4,000 m² solar panels
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 22/99
The BIOLOGICAL TREATMENT
Surface reduction with Processes based on attached growthfilms
Recent Trends:
• Biofiltrationa biological reactor with an aerobic / or anoxic biomass
attached to a fine granular media 3-5 mmacting as a filter
no final clarification
• Moving bed Bioreactor MBBR- a biological reactor with a moving bed consisting of a plastic
biofilm carrier
- a final solids / liquid separation is necessarynew trends are a high rate dissolved air
FLOTATION – 25 m3 /m².hor MICROSCREENING
ADB - MANILA – November 18th, 2011 22
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 23/99
BIOFILTRATION
e mos compac poss y a e momenDegrémont’s BIOFOR
Carbon Removal or Nitrification
ADB - MANILA – November 18th, 2011 23
emova o car on an n trogen + p osp orus requ re n t e pre m nary stage
A lot of combinations with various treatment steps: physico-chemical and biological
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 24/99
BIOFILTRATION – References in the world are very numerous
– ,
DALIAN – China / 120,000 m3/d
ADB - MANILA – November 18th, 2011 24
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 25/99
BIOFILTRATION: OSLO (Norway)–Built in rock caverns
,
ADB - MANILA – November 18th, 2011 25
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 26/99
Another Example: PARIS (Colombes) - France
1,000,000 m3 / d in stormconditions
•32,400 m² underground
•13,000 m² above ground
BOD5 pollution equivalent to 2.2 millioninhabitants in storm conditions.
ADB - MANILA – November 18th, 2011 26
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 27/99
MOVING BED BIOREACTORS MBBR
Meteor 660 type *
METEOR
2 possible ways:
• IFASIntegrated fixed filmactivated sludge process
• MBBRMoving bed bioreactor
• Protected surface: 660 m²/m3
• Diameter: 12.2 mm
• Length: 12.0 mm
ADB - MANILA – November 18th, 2011 27
• ater a :* Two other types existing 450 and 515 m²/ m3
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 28/99
• IFAS Process –
Activated Sludge (reduced nitrification stage)
but much less Compact than MBBRFinal Clarification does subsist
– Adapted to quality expansions: C N / DN
• MBBR – , ,
Associated with very compact final separation stages- high rate dissolved air flotation (DAF)- microstraining
ADB - MANILA – November 18th, 2011 28
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 29/99
MBBR Configurations for CARBON and NITROGEN REMOVAL
Dissolved Air Flotation
Microscreening – 10 µ
Other type of microscreening – µ
ADB - MANILA – November 18th, 2011 29
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 30/99
MBBR
or a tertiary stage complementary to a CAS* for BOD5 polishing..,Nitrification, Denitrification w ith methanol
Degrémont is implementing in DHAKA (Bangladesh) – 474 MLD
nitrification plant for drinking w ater plantanalogous w ith a tertiary treatment of domestic sewage.
NH4 inlet concentration: 15 to 20 mg/ L
ADB - MANILA – November 18th, 2011 30
* Conventional Activated Sludge
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 31/99
The biggest WWTP in Europe > 2 millions m3/day
A FINAL CASE STUDY
GREAT PARIS / ACHERES (North West)70 m3/s in Storm Conditions
Current Status:
A conventional WW TP
various stages
Non integrated in the
region
Odour nuisances
Bad- impact on neighbourhood- c aims
- devaluation of real estatevalues
ADB - MANILA – November 18th, 2011 31
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 32/99
GREAT PARIS / ACHERES
Approx. 10 Years of Works
Complete rehabilitation of the site
Nuisances ZERO Environmental INTEGRATION
COMPLETE RECOVERY
o t e rea estate va ue n t eneighbourhood
A pretreatment passing 70 m3/s
(Storm peak)
A biological treatment passing up to2,200 MLD with a peak of 51 m3/s
Biological filtration + MBR for 300 MLD
ADB - MANILA – November 18th, 2011 32
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 33/99
TREATED WASTEWATER REUSE
ADB - MANILA – November 18th, 2011 33
Doha LUSAIL (Qatar) – 60,000 m3/d – 260,000 P.E.
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 34/99
TREATED WASTEWATER REUSE
Think about Reuse
Easy and Cheap
-All technical tools - Additional costs are generallyare available limited unless Reverse osmosis
is involved for reducing salinity
-Recently UF membranesBrought new prospects
but linked to very regional conditions climate, distance between theWWTP and the enduser, …
ADB - MANILA – November 18th, 2011 34
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 35/99
A GOOD IDEA
Many European Countries practice an indirect recycling for drinking
Treated waterualit is ada ted
Drinking WaterTP
Town B
RIVER
ADB - MANILA – November 18th, 2011 35
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 36/99
• The most o ular
Agriculture
Irrigation
Play grounds, publicparks, gardens, lawns,olf courses tree-lined
avenues, recreationalimpoundments
• n us r a coo ng or any n us r a reuse
• Groundwater recharges into potable or non potableaquifers
• Indirect potable reuse (Singapore – PUB)• Direct potable reuse – extremely scarce (Windhoek –
ADB - MANILA – November 18th, 2011 36
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 37/99
Objectives to be settled
• Reuse olic Local strate
• ualit of Treated water to be obtained
Localregulations
Local Technical &Economical
Conditions• Reduction of salinity to be obtained or NOT
R.O. required or NOT
ADB - MANILA – November 18th, 2011 37
d l d l
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 38/99
Guidelines, Recommendations, Regulations
Many in the World
Well known – W.H.O. Guidelines for Reuse in Irrigation
(relating to Health only)
– US EPA Environmental Protection Agency
For• BOD5 < 10 mg/lUnrestricted Urban Uses • <• No detectable Fecal
Coliforms / 100 ml• Residual Chlorine > 1 mg/L
oo crops eaten rawrecreationalimpoundments
Groundwater Recharges Site Specificor Industries
For
ADB - MANILA – November 18th, 2011 38
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 39/99
Main Possibilities:
• Tertiary Treatment dow nstream a SecondaryTreatment
genera y a conventiona activate s u ge
process leading to
» BOD5 < 20 mg/ L
» SS < 20 m L
» TN < 15 mg/ L
• Integrated secondary / tertiary treatment
UF Membrane BIOREACTORS
ADB - MANILA – November 18th, 2011 39
FLOW DIAGRAMS ith t REVERSE OSMOSIS
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 40/99
FLOW DIAGRAMS without REVERSE OSMOSIS
CONVENTIONALACTIVATED SLUDGE T.P. M3+
PST SSTAT CoagulationSand
FiltrationDisinfection
Ultrafiltration SafetyDisinfection
BOD5 < 20 mg/l
SecondaryTreatment
2
SS < 20 mg/lTN < 15 mg/l
PST MBRSafety
Disinfection
Bioreactor
ADB - MANILA – November 18th, 2011 40
a case study in AUSTRALIA
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 41/99
a case study in AUSTRALIA
• A WWTP for discharge to the Pimpama River – capacity 17 MLD
• A RWTP (recycled water treatment plant) – capacity 12 MLD’
• Toilets
• Fire hydrants
• External reuse (gardening)
Commissioned in 2008
ADB - MANILA – November 18th, 2011 41
General FLOW DIAGRAM
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 42/99
General FLOW DIAGRAM
ADB - MANILA – November 18th, 2011 42
Recycled Water Quality
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 43/99
Recycled Water Quality
Median Values 95%ile Values
. Turbidity (NTU) 2 5
(Bacteria) . E-Coli (cfu/100 mL) 1 10
Parasites)
.
. Viruses (pfu/100 mL) 1 10
. Manganese (as Mn) (mg/L) 0.01 (85%ile) 0.05 (max.)
Specific of Reuse in Toilets to avoid Black Stains
ADB - MANILA – November 18th, 2011 43
FLOW DIAGRAM
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 44/99
FLOW DIAGRAM
17 MLD TN 2.7 mg/L (50%ile)
Sludge Plant
ChlorinationSand Filters
Sand Filters
Cl2 for Mn Oxidation
PIMPAMA River
12 MLD
UltrafiltrationMEMTECH
(Rack System)
UVUnits
Cl2
Storage Tank10,000 m3
REUSE APPLICATIONS (Housing)
ADB - MANILA – November 18th, 2011 44
SLUDGE and ENERGY
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 45/99
SLUDGE and ENERGY
Anaerobic Digesters (8 x 15,000 m3)of SANTIAGO de CHILE
oso s ompost ng n e
ADB - MANILA – November 18th, 2011 45
WATER & SLUDGE TREATMENT
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 46/99
WATER & SLUDGE TREATMENT
• Water Treatment (liquid phase)• High Electrical Energy Consumption of the complete WW TP (80-90% )
• The Biological Treatment itself (35-50%)
• genera es u ge• Highly organic 65-80% from P rimary Sedimentation
+ Biological Treatment Steps
• A huge burden or an opportunity
ADB - MANILA – November 18th, 2011 46
OPPORTUNITIES
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 47/99
OPPORTUNITIES
• How to pass from a Burden to an opportunity
• To produce energy from Organic matter• Anaerobic Digestion Methane CH4
•
• To valorize Sludge and produce Biosolids
acce table for A ricultureClass A (US EPA for instance)
to upgrade Sludge from a residue to Biosolids
ADB - MANILA – November 18th, 2011 47
Key Aspects
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 48/99
y p
• More and more constraints – Sludge Production growth more and more WWTPs
– More and more stringent regulations for final disposal:Legislative P ressure
– Sustainable development cri teria: a global concern
• us omer s ncreas ng concerns ar e ressure – Increasing costs
– Public acceptance is decreasing
Farmers acceptance
Uncertainties on the future of disposal ways
• Many site specific aspects
LOCAL OPTIMISATION
ADB - MANILA – November 18th, 2011 48
International Trends
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 49/99
• Diversification of Disposal Routes
on long term disposal routes may change:
» Full landfills
» Economical conditions variations
» Public acceptance decrease
Multiways processes: Examp e: T erma rying pe ets to agr icu ture or to power
cement plant as a fuel
• Improvement of Agricultural use acceptance
Part 503 Biosolids
• Optimization of Energy Recovery» Biogas production in anaerobic digestion
» Steam production in Incinerators
• Reduction of Odour Nuisances and Air Pollutions
ADB - MANILA – November 18th, 2011 49
Other International Trends
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 50/99
Generally, parallel to sustainable development criteria
• Reduction of Sludge Production
less transportation cost and less road trafficless CO2 emissions,ess env ronmen a mpac
• Either at source less dry solids (DS) produced
ex: Anaerobic digestion 30-40% less DS
• Or by volume reductionDewatering, drying
• Or bothIncineration remaining mineral DS
1,000 kg of DS at 25% approx. 80 kg of ashes(8% of initial weight)
ADB - MANILA – November 18th, 2011 50
OPTIMIZATION of SLUDGE TREATMENT
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 51/99
• Deeply linked to regional conditions: – egu a ons, c ma e, ava a e an , cos o energy, …
• Starts from Downstream disposal strategy: – Agricultural reuse
– Landfilling
Wet Mechanical
Thickening
SludgeHydrolysis REED
– a er a reuse
Mechanical
dewatering
oxidation
Thermal
dryingLime dosing Composting
dewatering
SOLAR
DRYING
Digestion
Gazification /pyrolysis
Dedicatedincineration
Wasteincineration
Energyproduction
ADB - MANILA – November 18th, 2011 51
Materialreuse Landfill
Agriculturalreuse
Up To Date Technologies and Trends
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 52/99
• Boosted Anaerobic Digestion, with efficient mixing
• Boosted Dewatering
• Thermal Drying
• On site Incineration
•
ADB - MANILA – November 18th, 2011 52
Anaerobic Digestion
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 53/99
• Well known Mesophilic (35°C) Anaerobic Digestion has keyadvantages:
Process requires few energy(to the contrary of Aerobic Digestion)
High reduction of Organic Matter
30-35% of dry solids reduction
Biogas (CH4) production w ithpossible energy recovery
Gas network feeding
Long term stabilizationlong term storage
ADB - MANILA – November 18th, 2011 53
ANAEROBIC DIGESTION BOOSTERS
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 54/99
• Many different research axis
• But all have the same basisLYSIS of
• Different means applied:• Mechanical
Non satisfactor results
• Ultra sounds
• Enzymatic hydrolysis under Development
• Thermal Hydrolysis / A well Proven Process
CAMBI Process
ADB - MANILA – November 18th, 2011 54
CAMBI PROCESS
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 55/99
• Norwegian company which has developed for morethan 10 years a thermal process of sludge toenhance anaerobic digestion
ADB - MANILA – November 18th, 2011 55
Cambi Process: general schematics
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 56/99
Liquid sludge
steam
Heat recovery
fumes
water
Pre-dewatering CHP
Biogas
Electricity
ANAEROBIC
hopperPost-
dewatering
water
CAMBIDIGESTER
35°C
Thermal
HydrolysisProcess
at 160-165°C
ADB - MANILA – November 18th, 2011 56
Dewatered sludgeFiltrate
CAMBI : the principle
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 57/99
waterTo the boilerRecycled
steam
dr ness 14%
P R
°F
T 45°C
dryness 12%
Recycleddigested
sludge
80/100°C5-6 bar
~105°C
Dilution
Reactor160-165°C
steam
water
Pulper steamFlash Tank
30’
hopperPre-dewatering
Dryness 15%To the di ester
ADB - MANILA – November 18th, 2011 57
CAMBI : NAESTVED WWTP (Denmark)
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 58/99
A typicalcase
Reduction ofSludge
Quantities
and
H ienization
forAgriculturalReuse
ADB - MANILA – November 18th, 2011 58
CAMBI: Naestved – Cambi + MAD* vs MAD*
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 59/99
Biogas = 600 Nm3/d
4 t TS/d60% VM/TS
TS= 6%63 m3/d
3.1 t TS/d
1600
m3
Conventional desi n=
dryness 18%
* MAD = Mesophilic Anaerobic Digestion Cake Production: 17.2 T/D
Biogas = 900 Nm3/ddilution
38 m3/d
S = 10% SRT = 15 d
4 t TS/d60% VM/TS 2.8 t TS/j
46% VM/TS
600
m3
ADB - MANILA – November 18th, 2011 59
TS =15%
ryness
Cake Production: 9.3 T/D (- 45%)
Some Main References
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 60/99
CAMBI : Dublin (1.9 millions pe)
SBR files on 2 levels
4 pulpers, 8 reactors,2 flashtanks
3 digesters(4,500 m3 each)
ADB - MANILA – November 18th, 2011 60
CAMBI ProcessAdvantagesKEY
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 61/99
• Reduction of Anaerobic Direction Volume (2.5 times)
Sludge Class A (US EPA Biosolids Part 503)
instead of Class B
Biogas more Energy to be recovered
for Thermal Drying
• u ge ewa er ng: - on ca e ryness
• Cake to bedisposed of: 20 to 40% reduction
Depending onSludge quality
ADB - MANILA – November 18th, 2011 61
BOOSTED DEWATERING
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 62/99
Liquid sludge generally dewatered (cake production) before• Transportation to final disposal: landfill for instance
• A further treatment sta e:» Thermal drying
» incineration
always a profit
• Less transportation costs
• Less fuel if thermal drying• Autogenous combustion reached with low er water content if
incineration
Orientation based on economical o timization but trends are:• Increase of Fuel Cost Reduction of transportation costs
• Reduction of greenhouse effects Boosteddewatering
ADB - MANILA – November 18th, 2011 62
Conventional DEWATERING DEVICES
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 63/99
• Belt Filter Presses
DECADES with chemicalconditioning:
• Polymer
• Lime
• Plate Filter Presses • Ferric ChlorideCentrifuge Plate Filter Press
Belt Filter Press
ADB - MANILA – November 18th, 2011 63
A NEW EMERGING TECHNOLOGY
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 64/99
The DEHYDRIS TWIST workshop based on theBUCHER P iston Press
A smarttechnology
compe ng w
Centrifuge +predryer
or
automatic pressfilter
ADB - MANILA – November 18th, 2011 64
How it works
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 65/99
ADB - MANILA – November 18th, 2011 65
How it works
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 66/99
ADB - MANILA – November 18th, 2011 66
SOME RESULTS
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 67/99
Cake Dryness
Low Load Activated Sludge Belt Filter Press 17-18%Polymer only
no r mary sett ng entr uge -
Filter Press (conventional) 26-27%
32 %
Polymer + FeCl3
FeCl3 + CaO (35%)
- +40%
3
FeCl3 + Cao (30%)
Mixed Sludge
Primary + Biological Sludge
Belt Filter Press 22-25%Polymer only
Centrifuge 25-28%
Filter Press (conventional) 31-32%
Bucher Piston Press
(70% Primary Sludge)
35%
40%
Polymer
Polymer + FeCl3
ADB - MANILA – November 18th, 2011 67
To summarize Results with Piston Press are equivalent to Filter Press with MEMBRANES
BUCHER’s REFERENCES
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 68/99
Lot of references in food industries with the sameTechnology (2000 presses in fruit juice production).
Major references for municipal digested sludge:
• in Sweden:
– Käppala 700,000 EH (8,000 T DS/year)
• in Germany:
– Lingen 195,000 EH
Conclusions on advantages:
– Higher dryness obtained than those obtained onconventiona mac ines
– Equivalent to sophisticatedfilter presses withmembranes, but
100% automatic
(no operating staff)
ADB - MANILA – November 18th, 2011 68
SLUGE DRYING
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 69/99
less humidity (10-15%)
A perfect pivot for all disposal routes
• Long terme storage
• Reuse in Agriculture Reduced volumeSiviculture Pasteurised productHorticulture Valuable Biosolids
which can be supplemented byPotassium, Nitrogen, Phosphorus
• Landfilling
• Co-incineration w ith garbage
• Reuse as a fuel in thermal power plant or cement plant
• Incineration
ADB - MANILA – November 18th, 2011 69
Two Main Ways
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 70/99
Depending on Climate
Energy costs
SOLAR DRYING DRYING BEDS, LAGOONS
Availability of land
or THERMAL DRYINGPossible Acceleration of SOLAR
Radiation in a Greenhouse
Many types existingon the Market
Solution to be adapted tolocal climate but
generally not adapted to Megacities
Few are reliable
ADB - MANILA – November 18th, 2011 70
THERMAL DRYING
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 71/99
Or Industrial drying usinga fuel source
Fuel Oil
LNGExternal
Many types of dryers in the world
direct / indirect/ mixeddrum / belt / multiple hearth / fluidized …
Few are safe and reliable for SLUDGE dryingsince they are coming from other applications
chemical industry
and adapted to sludge treatment
SLUDGE VARIABLE RAW MATERIALis a
ADB - MANILA – November 18th, 2011 71
THERMAL DRYING
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 72/99
A variable raw materialMany type of Dryers
•
• Quality of sludge primarysecondary
any parame ers• Granulation
• Safety -> risk of fire or explosion• Maintenance -> operating time per year
• Industrial waste
• Ability to natural granulation
•• Flexibility type of sludge
dryness 65-90%• Energy consumption
• -• Pollution of water evaporated• Storage conditions• Ability of pellets to be incorporated in soilDegrémont selects the optimized
• Variations of sludge qualities ifcentralized drying facility
drying process according to its
experience in Construction &Operation
ADB - MANILA – November 18th, 2011 72
THERMAL DRYING
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 73/99
Degrémont has learnt over 30 years
We know how to select the proper dryer for the PROPER
USE.
Some case studies:
– CORK (2nd town of I reland)
– -
ADB - MANILA – November 18th, 2011 73
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 74/99
CORK (2nd Town of Ireland)
450,000 Inhabitants
• 2 dryers of 1,700 kg H2O/hr each
Drying in 2 steps:• 1st step 45-50%
• 2nd step 70-95%
1st step : indirect drum dryer
ADB - MANILA – November 18th, 2011 74
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 75/99
First stageoutlet
The Spaghettis extruded by the Chopper
Sludge(45/50 % Dryness)
Sludge crushing
Interchangeable screen(perforated 8 mm sheet iron)Fibers/Tows scraper
Snail(eccentric)
Sludge spaghettis
Swiveling belt(inlet band dryer)
ADB - MANILA – November 18th, 2011 75
CHOPPER (Spaghettis Machine)
The second STEP: Band Dryer
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 76/99
ADB - MANILA – November 18th, 2011 76
The 2-STEP DRYERhas major advantages
INNODRY CONCEPT
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 77/99
• Total granulation withoutPellet-Mill
• No dust max. safetyexplosions are coming from dust
• Reduced thermal energy due torecovery from 1st stage to 2nd stage700-750 kWh/T evaporated water
Other processes are consuming upto 60% more (direct dryers)
• Flexibility to adjust the final product
• , , ,
no pellet millThe key advantage Safety Operation
ADB - MANILA – November 18th, 2011 77
Low air temperature on belt dryer – 105°C
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 78/99
PARIS – South East VALENTON WasteWaterTreatment Plant
Drying Facility
ADB - MANILA – November 18th, 2011 78
General view of the Plant
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 79/99
ADB - MANILA – November 18th, 2011 79
TRANSPORT of SILOS
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 80/99
ADB - MANILA – November 18th, 2011 80
NUTRIENTS adding to DRIED SLUDGE
Technical Data :
Hourly capacity : 40 T/hr
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 81/99
Hourly capacity : 40 T/hr
-Discontinuous cycles
-Yearly capacity : 5000 T/year
-Added nutrients (2 max.) :
oPotassium Chloride : KCl
sludgehopper
Hopper
Hopper
oPotassium Sulphate: K2SO4
oUrea
oOligo elements
-Nutrients conditioned in big bags
Fertilizers for 5% Nitro en
Additiveproduct
Inlet
10% Phosphorus
Typical agricultural use 10% Potassium
Hopper Outlet
Pneumatic transporttowards trucks or trains
Operation withdiscontinuous cycles
ADB - MANILA – November 18th, 2011 81
NUTRIENTS ADDING
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 82/99
ADB - MANILA – November 18th, 2011 82
INCINERATION of DEWATERED SLUDGE
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 83/99
egr mon as s ow n ec no ogy
the HIGH TEMPERATURE FLUIDIZED BED
and a REAL EXPERIENCEabout many plants in operation in NORTH AMERICA
80% of sludge incineration systems in
e as years100% since 2000
when no reuse as biosolids is possible
ADB - MANILA – November 18th, 2011 83
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 84/99
The high temperature fluidized bedAn internationally accepted standard process
A simple reliable system: a big stove
But: – Flue gas has to be highly purifed according to local legislation
– Public acceptance has to be obtained
– Thermal balance has to be optimized
(no additional Fuel)
high cake dryness at inlet (boosted dewatering)
optimization of thermal loops
– Mineral ashes have to be disposed of.
ADB - MANILA – November 18th, 2011 84
The Thermylis furnace – A big Stove
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 85/99
The fume passes through a flue
-
Water spray
roof dome
reactor
Flared shell lined
with refractories
Sand bed
Upkeep burner Freeboard
Sand feed nozzle
Fluidization grid fitted
with tuyeres
-
Fluidized
bedSludge feed
nozzle Injection pipe for
make-up fuel2 versions :
• “Hot” windbox refractorized
refractory arch
Windbox
Fluidization
for hot temperatures
(Tmax = 650°C)• “Cold” windbox
(Tmax = 400– 450°C)Preheating
burner
Sand extraction
nozzle
ADB - MANILA – November 18th, 2011 85
The sludge Incineration
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 86/99
Purpose: Using the inner energy of sludge to removefrom it completely the organic matter and the water
1000 kg of
sludge
Dryness = 25%
Puridied
flue gas
Dryness 25%VS/DS = 70%
• 750 kg H2O
Volatile Solids 175 kg
ThermylisFluidized Bed
Incinerator
Dry ashes
74 kg 81 kg
Approx.
8%• Volatile Solids 175 kg
• Mineral Solids 75 kg
IncineratorPurification
residues7 kg
of initial
weight
ADB - MANILA – November 18th, 2011 86
Thermal Balance
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 87/99
AIRCOMBUSTION
850°C
SLUDGEOrganic matter (LHV)Mineral matterWater
n a py
Steam-generating heat
(Enthalpy)
HEAT LOSSMAKE-UP FUEL ?
ADB - MANILA – November 18th, 2011 87
The heat recovery
O ibilit
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 88/99
Preheatin of fluidization air
One possibility
Preheated air 400–650°C
SludgeFLUE GAS
PURIFICATIONFURNACE with
hot windbox
850°C Heatexchanger
500–
600°C
Dryness
180– 600°CAdditional
equipment
Cold air
Initial cakedryness
2nd exchanger
Saving of energy is achieved on part of the heat that would°
Boiler for pre-drying
ADB - MANILA – November 18th, 2011 88
The autogenous combustion
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 89/99
Autogenous combustion for 1 ton of DS of sludge+ 51 k of fats, FS/DS = 85%, Dr ness = 30%
30%
35%
40%
e
A cheap investment forA cheap investment for
an efficient energyan efficient energy
20%
25%
s o f s l u d g
10%
15%
D r y n e
Preheating of air at 650°C
Preheatin of air at 400°C
Preliminary drying could be
efficient solution if energy is
0%45% 50% 55% 60% 65% 70% 75% 80% 85%
Preliminary drying of sludge
ADB - MANILA – November 18th, 2011 89
/
From small units ELBEUF - FRANCE
100,000 inhabitants
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 90/99
HTFB INCINERATOR dia. 2.34 mGeneral view at the end of erection
ADB - MANILA – November 18th, 2011 90
To giant units PUERTO RICO dia. 4.68 m
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 91/99
ADB - MANILA – November 18th, 2011 91
Composite Solutions
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 92/99
• I f the reuse in agriculture is the basic driver
• But if the production capacity of granulates may exceed the
market needs permanently or periodically (seasonal variations)
A composite solution combining Thermal Drying andIncineration may be optimized.
Dewatered Thermal Drying GranulatesPellets at 90 %
20-40% dryness
Incineration
Ashes to
Landfillingor Reuse(Cement Plant..)
ADB - MANILA – November 18th, 2011 92
ENERGY RECOVERY from ANAEROBIC DIGESTION BIOGAS
Bi f Di ti 60 65% f CH4 M th
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 93/99
• Biogas from Digestion 60-65% of CH4 Methane+ CO 2 + traces (H2S, … )
• High calorific value 6-7 kWh / S m3
• Direct production of THERMAL HEAT through Boilers – Heating sludge before digestion
– Heating o o ices – Feeding a thermal drying
• Direct injection in a gas network
after a pretreatment (: sulphide reduction,pressure and humidity Control)
80,000 m3 / day
ADB - MANILA – November 18th, 2011 93
COGENERATION on GAS ENGINES, MICROTURBINES, TURBINES
> 20 200 kWe
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 94/99
> 20-200 kWe
> 20 kWe
> 1,2 MWe
- Thermal efficiency 45%
Most of Applications (95%)
Electrical efficiency 35-40%Thermal efficiency 45%
Electrical efficiency 29%Thermal efficiency 56%
ADB - MANILA – November 18th, 2011 94
CONCLUSIONS on Overall Optimization of SLUDGE and ENERGY
To find the best Sludge and Energy management strategy
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 95/99
To find the best Sludge and Energy management strategyadapted to local conditions
• reduction of mass: digestion + energy
(dry solids) production
To what extent? • reduction of volume: drying
•
In Relationship with Potential final disposals
Production and cost of energy
ADB - MANILA – November 18th, 2011 95
To launch tenders which consider Comparison of Overall Costs
–(= NPV)
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 96/99
(= NPV)
Taking into account “Proactive”“Ambitious”
for Electrical Energy (example of Green Energy in
Unit costs
for Sludge Transportation
o crea e a v r uous c rc e n avor o ec n ca so u ons a ng n oaccount:
• sustainable development concept
• Cost of energy limitation of consumption
• Limitation of greenhouse gas emissions
ADB - MANILA – November 18th, 2011 96
•
Example
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 97/99
• Producing electrical energy from Anaerobic Digestionhas an additional CAPEX (gas engines + auxiliaries)
compare solutions (w ith and w ithout gas engines)
w ith high electrical kWh unit costgreen energy in Germany
ADB - MANILA – November 18th, 2011 97
SELECTION of a CONTRACTOR
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 98/99
May we suggest a w in/ w in procurement process
• Design / Build / Operate (DBO) Contractswith erformance based s ecifications
w ith general & particular specifications
• Operation Period 2 years
– -
– To leave time to Client to control – Treatment guarantees – Operation costs application of penalties if failures
ADB - MANILA – November 18th, 2011 98
SELECTION of a CONTRACTOR
S l ti f C tit t t l
8/3/2019 WWMT-D2S3.2 Modern Trends with Integrated Aspects on Wastewater Treatment (Liquid Phase ) and Associated Sludge Treatment Optimisation by Alain Meunier
http://slidepdf.com/reader/full/wwmt-d2s32-modern-trends-with-integrated-aspects-on-wastewater-treatment-liquid 99/99
• Selection of Competitor on a total
+ years or more + on years
of OPEX costs w ith unit costs on consumablesanticipating increases on energy costs
Proactive action on unit costsof :» kWh (green energy)
Includin Bonuses
»
Virtuous circle
for the FUTURE
on Land Savings
ADB - MANILA – November 18th, 2011 99