Program on Technology Innovation: Integrated Generation Technology
Next Generation Anaerobic Technology · – Proven technology – Net revenue provider • Biogas...
Transcript of Next Generation Anaerobic Technology · – Proven technology – Net revenue provider • Biogas...
A Lifecycle Performance Company
DACSNext Generation Anaerobic Technology
11th December 2014
Envirogen Water Technologies
Short Retention TimeAnaerobic Treatment of Industrial Wastewaters
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Basin Water
Biggler
Assoc.
Envirogen
USA
Derwent
Fluxa
EWS
Puresep
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Europe
EnvirogenGroup
Aqana
Envirogen Water Technologies
Envirogen Water Technologies
DACSDownflow Anaerobic Carrier System
DACS
• Downflow Anaerobic Carrier System
– Downflow
• Gravity feed via top level sparge distribution system
– Very low parasitic energy demand
Envirogen Water Technologies
DACS
• Downflow Anaerobic Carrier System
– Downflow
• Gravity feed via top level sparge distribution system
– Very low parasitic energy demand
– Anaerobic
• Flocculated biomass
• Natural mixing in fluidised controlled environment
Envirogen Water Technologies
DACS
• Downflow Anaerobic Carrier System
– Downflow
• Gravity feed via top level sparge distribution system
– Very low parasitic energy demand
– Anaerobic
• Flocculated biomass
• Natural mixing in fluidised controlled environment
– Carrier
• Encases flocculated biomass
– Robust polyethylene construction
Envirogen Water Technologies
DACS
• Downflow Anaerobic Carrier System
– Downflow
• Gravity feed via top level sparge distribution system
– Very low parasitic energy demand
– Anaerobic
• Flocculated biomass
• Natural mixing in fluidised controlled environment
– Carrier
• Encases flocculated biomass
– Robust polyethylene construction
– No mechanical separation of biomass required
– No uncontrolled “washout” of biomass
– System
• High rate system
– Typical loading rate 18 – 35kg COD/m3/d
Envirogen Water Technologies
Envirogen Water Technologies
DACS
“Are You Sure?”
DACS Downflow Process Benefits
• Low Level Energy Consumer
– Gravity flow through carrier bed
– Examples:
• UK Brewery 2.5t/d/COD
– Parasitic energy requirement £6k/y
• UK Brewery 1.5t/d/COD
– Parasitic energy requirement £5k/y
• UK Distillery 12t/d/COD
– Parasitic energy requirement £20k/y
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DACS Downflow Process Benefits
• Expected Performance
– 95% conversion of SCOD
– 90% conversion of TCOD
• Typical Biogas Quality
– 90% methane
• Calcium
– Virtually zero deposition
Envirogen Water Technologies
DACS Downflow Process Benefits
• High Rate Process
– Typically 2-6 hours detention rate
• CSTR typical detention of 48 - 72 hrs
– Typical loading rate 18 - 35 kg COD/m3/d
• Low loading example 10 - 12 kg COD/m3/d
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DACS Downflow Process Benefits
• No Fixed Aspect Ratio
– Internals can be adapted to any profile tank
• New build/retrofit
• Future Proof
– Freeboard to accommodate extra carriers
Envirogen Water Technologies
DACS Downflow Process Benefits
• No Fixed Aspect Ratio
– Internals can be adapted to any profile tank
• New build/retrofit
• Future Proof
– Freeboard to accommodate extra carriers
• Building Block Design
– Pre-engineered process blocks
Envirogen Water Technologies
Some References
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Fruit Juice
• Design
1,000m3/day, 7 TPD TCOD
• Location
Poland
• Scope
DACS (Anaerobic), MBBR (Aerobic)
• Discharge
To River - COD <150mg/l
• Footprint
12m x 50m
• Biogas
Typically 2,000 Nm3/day
Brewery
• Design
360m3/day, 2.2 TPD TCOD
• Location
UK
• Scope
DACS (Anaerobic), Aeration
• Discharge
To Sewer - COD <600mg/l
• Footprint
240m2
• Biogas
Typically 760 Nm3/day
Potato
• Design
1,150m3/day, 6 TPD TCOD
• Location
Germany
• Scope
DACS (Anaerobic), MBBR (Aerobic)
• Discharge
To Sewer - COD <500mg/l
• Footprint
12m x 12m
• Biogas
Typically 1,700 Nm3/day
Cardboard
• Design
3,600m3/day, 5.5 TPD TCOD
• Location
Italy
• Scope
DACS (Anaerobic), MBBR (Aerobic)
• Discharge
To River - COD <160mg/l
• Footprint
DACS in existing tank 10m x 10m
• Biogas
Typically 1,200 Nm3/day
In Summary“It seems to good to be true!”
Envirogen Water Technologies
Process - Next Generation Anaerobic Technology
• DACS
– Proven technology
– Net revenue provider
• Biogas generation & re-use
– Simple to construct & operate
– Readily expandable process
– Low OPEX
• No waste sludge off-site
• Low parasitic energy requirement
– Simple biogas clean-up
Envirogen Water Technologies