Download - INTEGRATED SYSTEM FOR THE TREATMENT OF MUNICIPAL WASTEWATER AND BIODEGRADABLE SOLID WASTE
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INTEGRATED SYSTEM FOR THE TREATMENT OF MUNICIPAL
WASTEWATER AND BIODEGRADABLE SOLID WASTE
Dr. Malamis Dimitris
National Technical University of AthensSchool of Chemical EngineeringUnit of Environmental Science and Technology
“Water Resources Management: Needs and Prospects”
Jordan, Amman, 22/04/2013
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INTERWASTE ProjectINTERWASTE is co-funded by EU LIFE+ ENVIRONMENTINTERWASTE Partners
National Technical University of Athens (Greece)Cyprus University of TechnologyUniversity of Nicosia (Cyprus) Proplan Ltd (Cyprus) Department of Environment Ministry of Agriculture, natural
Recourses and Environment .
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Aim of present workDevelopment of an integrated system for sustainable
treatment of Biodegradable Organic Waste and Municipal Wastewater with zero discharge
Production of high quality, added value productsElectricity and heat from renewable sources (organic
waste)High quality effluent that can be reused (i.e. irrigation)High quality soil conditioner-compost
This can be achieved through the integration of aerobic and anaerobic processes by employing:
Membrane BioReactor-Anaerobic DigesterMBR - AD
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Potential users of the integrated MBR-AD system
Generally places where production of waste and demand of the obtained products from waste treatment co-exist:
Remote de-centralized regions
Small communities
Residential areas (i.e. blocks of flats)
Hotels
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MBR
AD
BIOGASDigestate
Flow Sheet diagram MBR - AD
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The integrated system The MBR – AD Unit
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Operating parametersMBR
1,5 m3/d municipal wastewatersludge outlet– 100 l/d => to AD
ADDaily preparation of substrate. Formation of a
mixture of 150L with 10% TS consisting of food waste and sludge from the MBR
150 L of digestate are separated into liquid and solid phase Solid phase => solar drier Liquid phase => recirculated to the MBR
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MBR
Flow Sheet diagram MBR - AD
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MBR – BUFFER TANK
Stainless steal vessel 8,5 m3
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MBR
Flow Sheet diagram MBR - AD
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MBR
Feedstock Municipal Wastewater from Buffer Tank
(1,5 m3/d)
Membrane BioReactor (MBR) system for
wastewater treatment
Effluent (water)
Sludge
Sludge fed to the Anaerobic Digestion System
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AD
Flow Sheet diagram MBR - AD
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Homogenization Unit – AD Substrate preparation
Homogenization Unit: • Sludge from the MBR• Food waste• Target 10±2% TS
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AD
Flow Sheet diagram MBR - AD
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Anaerobic Digester
Substrate from the Homogenization
Unit
Digestate
Biogas
Total volume 8,5 m3 Operating volume
4,5 m3
Substrate feed
150 L/d with 10 % TSMesophilic
Temperature (≈35oC)SRT = 20-25days
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AD – Biogas SystemBiogas
Storage (Balloon 3m3)
Biogas Meter Scrubber for biogas cleaning (VOC, ΝΗ3)
Packed bed Scrubber
(H2S)
Biogas Composition
Analysis
CHP unit
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Biogas Cleaning System
Scrubbers for biogas cleaning
CHP unit for energy
production
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Digestate
Flow Sheet diagram MBR - AD
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Bag Filter – Treatment of Digestate
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180 200 220 240 260 280 300 320 340 360 38070%
75%
80%
85%
90%
95%
100%
Start up1 ec-MBR 2 ec-MBR3 ec-MBR
Days of operation
% C
OD
rem
oval
ΜΒR performance % COD reduction
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180 200 220 240 260 280 300 320 340 360 38070%
75%
80%
85%
90%
95%
100%
Start up1 ec-MBR 2 ec-MBR3 ec-MBR
Days of operation
% T
N r
emov
al
ΜΒR Performance TN reduction
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180 200 220 240 260 280 300 320 340 360 38070%
75%
80%
85%
90%
95%
100%
Start up1 ec-MBR 2 ec-MBR3 ec-MBR
Days of operation
% N
H4
rem
oval
ΜΒR Performance - NH4+ reduction
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Biogas Composition CH4 = 59%, CO2= 40 %
100 150 200 250 300 350 4000
2
4
6
8
10
12
14
1 ec-AD2 ec-AD3 ec-AD4 ec-AD
Days of operation
Bio
gas
Prod
ucti
on (
m3/
d)AD Performance – Biogas Production
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Biogas - Energy Balance
Electricity
Biogas
100%Heat
33%
3.5 %
22%
31.5%
55%
35%
losses
10%
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MBR-AD potential applicationsTreating Biowaste & Municipal wastewater of a
community with population of 1,000 persons in Cypruscovers the electricity needs of around 55 inhabitants or 19
households Produces 150 m3/d of water that can be used for irrigation
Treating Biowaste & Municipal wastewater of a 5 star Hotel in Cypruscovers 3.4% of the needs for electricity and covers 3.6% of the heating needs Produces 250 m3/d water that can be used for irrigation
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THANK YOU FOR YOUR ATTENTION
Dr. Dimitris MalamisNational Technical University of AthensSchool of Chemical EngineeringUnit of Environmental Science and [email protected]: 2107723108Fax: 2107723285