ENR Upgrades Steve Woodard, Ph.D., P.E. Outline Intro to CWT - PowerPoint PPT Presentation

BioMag: New Technology for Cost Effective ENR Upgrades Steve Woodard, Ph.D., P.E.

Outline  Intro to CWT  Secondary clarification: the weak link  BioMag: ballasted biological treatment How does it work? • Applications • ENR Technology •  Winebrenner BioMag trial in Cascade, MD  ENR without the denit filters  Significant potential cost savings in Maryland

The Challenges of Biological Treatment  Secondary clarification is the bottleneck of activated sludge treatment • Filamentous bulking • Storm flow issues (I&I) • Pin floc  Limits MLSS concentration  Limits nutrient removal capacity  Compromises effluent quality  Requires expensive solutions to correct

Magnetite: the Enabler  Magnetite is Fe 3 O 4 , • Doesn ’ t rust or degrade • Completely inert  Two critical properties: • It’s dense; specific gravity: 5.2 • Magnetically controllable

The Benefits of Ballasted Biological Floc  Ballasted floc ensures rapid, reliable settling  Facilitates increased MLSS concentrations  Maintains control over sludge blankets (I&I)  Frees up tankage for nutrient removal (e.g. anoxic zones)  Provides clean effluent – low TSS  Facilitates low effluent TN!

BioMag: Enhanced Biological Treatment

4-Stage Bardenpho Process Flow

BioMag Pilot Trailer

Magnetite Feeder

Shear Mill

Recovery Drum

Rapid Clarification Increases Capacity

Magnets Are Used to Recover Magnetite  Video clip

Winebrenner Plant Layout

BioMag Influent and Effluent Nitrogen 60.0 50.0 40.0 Influent TKN Nitrogen, mg/l 30.0 20.0 10.0 Effluent NH4 + NO2 + NO3 0.0 1/22/2010 2/11/2010 3/3/2010 3/23/2010 4/12/2010 5/2/2010 5/22/2010 6/11/2010 Date

BioMag Influent and Effluent N, lbs/day 40.0 35.0 Influent TKN 30.0 Nitrogen, lbs/day 25.0 20.0 15.0 10.0 5.0 Effluent NH4 + NO2 + NO3 0.0 1/22/2010 2/11/2010 3/3/2010 3/23/2010 4/12/2010 5/2/2010 5/22/2010 6/11/2010 Date

BioMag Effluent TN and NH4 + NO2 + NO3 10 9 8 7 Effluent N, mg/l 6 5 4 3 2 Total Nitrogen 1 NH4 + NO2 + NO3 0 2/21/2010 3/3/2010 3/13/2010 3/23/2010 4/2/2010 4/12/2010 4/22/2010 5/2/2010 5/12/2010 5/22/2010 6/1/2010 Date

BioMag MLSS (not including magnetite) 16000 14000 12000 10000 MLSS, mg/l 8000 6000 4000 2000 0 2/1/2010 2/21/2010 3/13/2010 4/2/2010 4/22/2010 5/12/2010 6/1/2010 Date

BioMag Effluent TSS 30.0 25.0 Effluent TSS, mg/l 20.0 15.0 10.0 5.0 0.0 2/1/2010 2/21/2010 3/13/2010 4/2/2010 4/22/2010 5/12/2010 6/1/2010 Date

BioMag Effluent Total P 0.4 0.35 0.3 Effluent TP, mg/l 0.25 0.2 0.15 0.1 0.05 0 2/14/2010 2/24/2010 3/6/2010 3/16/2010 3/26/2010 4/5/2010 4/15/2010 4/25/2010 5/5/2010 5/15/2010 5/25/2010 Date

BioMag Wet Weather Flow Performance

ENR Without the Filters  Excellent, reliable TN removal  Same for TP  Low effluent TSS (< 5 mg/l)  High MLSS and low, stable sludge blanket  Frees up tankage for anoxic zones  Often eliminates need for new process tankage and/or IFAS  Also eliminates need for filters  Mitigates impacts of I&I  Scales up very well