Eerste Ervaringen met Anaerobe MBR - Waterforum€¦ · 1. Introduction to Veolia 2 Veolia Water...
Transcript of Eerste Ervaringen met Anaerobe MBR - Waterforum€¦ · 1. Introduction to Veolia 2 Veolia Water...
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Eerste Ervaringen metAnaerobe MBR
First Experience withAnaerobic MBR
Jan Pereboom
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1. Introduction to Veolia
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Veolia Water NederlandHarnaschpolder / Van Nelle
340,000 emp
100,000 emp
10,000 emp
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1. Introduction BiothaneSpecialist in anaerobic wastewater treatment
30 years of experience
500 referencesPart of Veolia since 2008
3 offices worldwide • BC, BSI, BAP
Biothane CorporationCamden NJ
USA
Biothane SystemsInternational
Delft, The Netherlands
Biothane AsiaPacific (VWS SEA)
Singapore
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1. Introduction Biothane TechnologiesUpflow Anaerobic Sludge Bed (UASB) • Granular sludge technology
• Load 8-15 kg COD/m3/d
• 250 references
Expended Granular Sludge Bed (Biobed EGSB)• Granular sludge technology
• Load 15-25 kg COD/m3/d
• 220 references
Biobulk (CSTR)• Suspended sludge technology
• Load 2-5 kg COD/d
• 13 references
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1. Introduction BiothaneExperience in Dairy and Related Industries
19 Full Scale Plants
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Iglo – Lagnese – Heppenheim - Germany
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2. Drivers for Anaerobic MBR
Specific wastewater characteristics • FOG (Fat, Oil & Grease) and LCA (Long Chain Fatty Acids)
Hamper granulation in UASB (EGSB)
• High concentrations; e.g. WheyUn-diluted: no granulation in UASB due to high HRT
Diluted: too large UASB reactor volumeSolution low loaded CSTR systems
Higher loading rate in CSTR digester• Uncoupling of HRT and SRT by use of membranes
Higher COD removal efficiencies• More Biogas; smaller post treatment; more compact
Clear effluents
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2. Drivers for Anaerobic MBR
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Characteristic CSTR digester AnMBR
SRTSolids Retention Time
up to 1 – 2 times HRT up to 4 – 8 times HRT
Loading rate 2 – 5 kgCOD/m3/d 5– 10 kgCOD/m3/d
Volume Large Smaller
Footprint Large Smaller
COD removal efficiency Reasonably highup to 85 - 95%
Highup to 99.5%
Effluent quality Poor, high TSS content Good, no suspended solids !!
Energy production High Even higher, energy consumption of membranes more than off-set by additional methane production
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3. Early Developments on AnMBRAqua Renaissance Project in Japan 1987-1993 • + 30 companies; lab scale and pilot scale• Combining conventional Anaerobic Reactors with Membranes• Various membranes and wastewatersResults• Technically very difficult; Reactors instable and Membrane Fouling • Commercially not feasible
Starch wastewaterUASB / Flat ceramic
SewageUASB / capillary Sulfonic
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3. Early Developments on AnMBR
Kubota; Japan; flat sheet sub-merged; as off 2000• Food Processing 2~6.5 m3/d 3#• Night Soil 16~20 m3/d 3#• Distillery/Shochu 15~60 m3/d 3#
Kubota/ADI; USA 2009• Food processing; retrofit
• 400 m3/d; 99%COD; 8 kgCOD/m3/d
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4. Challenges for Anaerobic MBR
Only 10-20% of Membrane Flux as compared to Aerobic • Large membrane area; high cost
• Limited to small flows and high concentrations
Scouring, Back-flush and Cleaning not enough• Biogas scouring complex approach
Scaling (inorganics) potentially more pronounced • Scaling also in permeate due to biogas stripping
Optimizing Flux by combination of:• Bioreactor design and operation
• Membrane unit design and operation
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5. Biothane Anaerobic MBR
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Biothane AnMBRSimplified Process Flow Diagram
34-38°C
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5. Anaerobic MBR at Daisy Brand (USA)Beta scale operated since 2007
75 m3/d; 50,000 mgCOD/l
HRT 8 days; 5-8 kgCOD/m3/d
99.5% COD removal
Tubular Norit X-flow membranes
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Digester Equalization Tank
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5. Anaerobic MBR at Daisy Brand (USA)
ull Scale since 2009 in Texas
90 m3/d; 62,000 mgCOD/l; 11 tonCOD/day
RT 8 days; 5-8 kgCOD/m3/d
ermeate: <200 mgCOD/l; TSS < 1 mg/l
9.5% COD removal
ubular Norit X-flow membranes
econd Full Scale since 2010 in Arizona
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DigesterEqualization Tank
Digester feed 60,000 mg/l on leftAnMBR permeate 200 mg/l on right
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5. Anaerobic MBR at Daisy Brand (USA)Full scale Performance Texas
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9 tCOD/day
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6. Biothane Anaerobic MBRCompact Digester; low footprint (8 kg/m3/d)
High COD concentrations > 20~30 g/l
Very high COD removal efficiencies
Minimal or no post-treatment
Minimal membrane fouling by• Reactor design; mixing
• Tubular cross-flow membrane units
• Solids and inorganics handling and removal
Modular solution to existing plants
Strategic cooperation with Norit
Unique solution by Biothane - Veolia
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6. Biothane Anaerobic MBR
Cross-flow membranes implies:• Easy access also during operation
• No need for biogas recirculation
• Easy CIP cleaning possible for scaling
• No system shut down for repair, replacement or maintenance of membranes
Short start-up time; any anaerobic seeding
No sludge granulation required
Inorganics can more easily be handled
Robust in handling COD changes, COD load peaks, hydraulic peaks
Modular design; also for small flows
Easy Odor Control
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6. Near Future Outlook Biothane AnMBRDairy and Whey offered to clients
More complex wastewaters; SS, FOG
Lower COD concentrations
Lab Scale Research in Delft and at Universities
Pilot Scale Research at clients
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Thanks for your attention
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