next generation anaerobic technology · – proven technology – net revenue provider • biogas...
TRANSCRIPT
A Lifecycle Performance Company
DACSNext Generation Anaerobic Technology
11th December 2014
Envirogen Water Technologies
Short Retention TimeAnaerobic Treatment of Industrial Wastewaters
Envirogen Water Technologies
Basin Water
Biggler
Assoc.
Envirogen
USA
Derwent
Fluxa
EWS
Puresep
Envirogen
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
Envirogen Water Technologies
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
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
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
Envirogen Water Technologies
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