Cleargreen ™ Presentation

treatment solutions | North America
Cleargreen
™
BIOLOGICAL TREATMENT
technologies overview
Cleargreen
™
The clear choice for a green solution
to treat high nitrogen concentration streams
Cleargreen™ - a patented process
Applications
Cyclic
Low
Energy
Ammonia
Removal
• Digester Supernatant
• Centrifuge Centrate
• Belt Filter Press Filtrate
• Landfill Leachate
• Influents with Ammonia-N Concentration >
250 mg/L, Low DO, Temperature > 20° C
Biological Treatment of High-Strength
Ammonia Streams
Cleargreen™ is particularly applicable for plants where side-stream
Nitrogen is a significant contributor to the influent Nitrogen load
Especially when effluent TN limit is < 8 mg/L
*
*Conventional activated sludge, MBR, MBBR
Nutrient concentrations in sidestreams would be elevated in case of:
• WAS pretreatment method implementation to enhance digestion
• Advanced anaerobic digestion technology to increase VSS destruction
Cleargreen™ is a good choice for treatment of side streams because…
Helps Plant Meet
Increasingly Stringent
Effluent Nutrient Limits
Reduces Size
of Biological
Treatment Line
Reduces Load (up to 25%
of total) on Main
Treatment Line
Significantly Lower O&M
Discontinuous Production No Shock Loads as Storage
Tank is Used
Easier to Treat Sidestream in
Cleargreen™ due to
Unfavorable COD:TKN ratio
Cleargreen™ reaction chemistry allows growth of specialized microorganisms
that offer effective treatment with low resource requirements
High Temperature of centrate ensures optimum anammox activity
NH3 + 1.32 NO2 + H+ → 1.02 N2 + 0.26 NO3 + 2H2O
PROCESS BENEFITS:
•
•
•
63% Lower Oxygen Demand
100% Lower Carbon (COD) Demand
30% Reduction in Biomass Production
Traditional N-DN Reaction
NH4
Nitritation Deammonification Reaction
O2
Nitritation
NH4
N2
O2
NO2
O2
NO2
N2
Deammonification
BOD
NO3
Cleargreen™ has a completely automated process control system developed
for maximum treatment efficiency and with adequate flexibility to respond
to changes in plant operation/loadings
Use of sub-cycles:
•
•
•
Ammonia selection at each sub-cycle
Limited Ammonia shocks
Limited pH variations
•
Achieves > 90% Ammonia-N
Removal
•
High Loading Rates
•
Fully Automated
•
Flexible Response To Flow /
Load Changes
•
Sustainable Development:
•
Reduced energy consumption
•
No reagents
Cleargreen™ has a quick start-up time
Results from Creil, France
900
Average Effluent
Ammonia – N = 11 mg/l
700
600
No Need for External
Seeding
500
400
300
200
100
Day
420
399
378
357
336
315
294
273
252
231
210
189
168
147
126
105
84
63
42
21
0
0
Nitrogen concentration m g N/L
800
Average Influent Ammonia
– N = 607 mg/l
Deammonification
Partial
nitrification
Ammonium in raw water - mg/L
Ammonium in treated water -mg/L
Nitrite in treated water - mg/L
Nitrate in treated water -mg/L
Cleargreen™ recent activities
Current Pilot Studies:
•
•
•
Henrico County, VA - Completed
Angers La Baumette, FRANCE
Bolivar, AUSTRALIA
Full-Scale Plants:
•
•
Burgos, Spain
Ourense, Spain
Cleargreen™ recent publications
• SIWW. 2014. Efficient control of deammonification Cleargreen™ plants:
First development at demonstration scale in Australia
• IWA. 2014. Efficient control of deammonification Cleargreen™ plants: Stable
operation under challenging centrate conditions
• Oz Water. 2014. Managing Ammonia load variations on the deammonification
process: Lessons learnt from the demonstration scale
• Oz Water. 2013. Improving sustainability of wastewater treatment with the
Anammox process
• IWA. 2013. Influence of anaerobic digester operation on centrate quality and on
start-up and performance of deammonification process.
• WEFTEC. 2013. Use of free ammonia levels and D.O. setpoints for process
control of sidestream deammonification sequential batch reactor.
Cleargreen™ recent publications
• WEF Nutrient Conference 2013. Use of free ammonia and dissolved oxygen for
process control of a sidestream deammonification sequential batch reactor.
• WEFTEC. 2012. Pilot-Scale Deammonification Study at the Henrico County
WRF: Considerations for process start-up.
• SIDISA. 2012. Treatment of sludge liquor with deammonification: Cleargreen™
process and technology aspects
• Water Science & Technology. 2010. Fast start-up of a pilot scale deammonification sequencing batch reactor from an activated sludge inoculum.
Vol. 61:1393-1400.
• WEFTEC. 2009. Fast start-up of a de-ammonification SBR treating sludge
digestate.
• WEFTEC. 2008. SBR sidestream process for high ammonium concentrated
effluent treatment: performance and sizing.
Cleargreen™ provides a low cost,
highly efficient system to meet stringent
effluent nitrogen permits
High O&M Cost Savings
Completely Automated
• 60% savings in aeration
• Can run without manual intervention saving
precious operator time and money
• 100% savings in external carbon addition
• 30% reduction in sludge production
Green Credits
• Federal grants for offsetting capital
expenditure
• Nutrient trading for O&M cost recovery
No need to change existing treatment train
• Plant continues to run normally while upgrade
construction takes place
Quick start-up time
• No need for external seeding
Modular construction for easy future
upgrades
Thank You!
Questions?
Contact:
Mudit Gangal
[email protected]
804-756-7630