Due to Compatible Pollutants Elaine J. Venema, P.E. September 2013 - PowerPoint PPT Presentation

Controlling POTW Pass- Through /Interference Due to Compatible Pollutants Elaine J. Venema, P.E. September 2013

 Nutritional Supplements/Dairy  Fruit Processing/Canning  Pickling Operations  Tannery/Rendering  Flour/Grain Mills  Egg/Poultry  Breweries

Win-win solution  Protect the POTW (collection & WWTP) and the environment  Maintain or attract industry Good for the community!

 Community Expectations/Goals  Industry Needs/Expectations  Finances/Funding Opportunities

Source Treatment Full Treatment:  Separate from POTW  Direct discharge  Challenges Pretreatment:  Screening  Primary Treatment  Solids Separation  Chemical Addition  Biological Pretreatment

 Variable waste loading  Need operations staff  Treatment onsite not always desired/feasible  Discharge (NPDES or GW)

 Determine what level is needed for win-win  Waste minimization & Best Management Practices  Pretreat to “domestic” And everything in between!

 Waste Stream Segregation  Equalization/Slug Prevention Sidehill Screen  Sidehill screen, or other  Grease interceptor (larger than this one) Grease Interceptor

 Concentrate waste products Belt Press To be hauled to POTW/anaerobic digester  Solids separation (belt press, etc) Can waste solids be used as livestock feed?

Tannery Food Supplement Mfg

High BOD, and Toxics Hair/Flesh FOG Leather chunks Slug loading Making … “Soft Corinthian Leather” Project Planning:  Hides per day  Capacity Evaluation  Meetings with SIU  Pilot Studies  Estimate Odor Control Needs  SIU Decision – Independence from POTW http://leather

 Full Treatment Onsite  Oxidation Ditch  NPDES Discharge

Evaluate short rock media TF  tall plastic media TF Project Planning:  Capacity Evaluation  Meetings with SIU  Capacity modeling GPSx  Pilot Study  Estimate Odor/Corrosion$  Industry Reconsideration

Pilot Study Towards … 13,000 #/Day

 Pilot study and evaluation: a TALL trickling filter is req’d  Financing: cash + grant Discussions with industry  Initial decision: pH pretreatment/equalization:  Not just WWTP improvements: Long F.M. with high BOD/Temp  Final result: SIU built pretreatment onsite, SBR  Discharge to POTW : Domestic strength BOD, TSS

So you want to treat at the POTW, now what? Next Steps:  Capacity Analysis  Ordinance/Legal Review & Determine Local Limits  WWTP Improvements, if necessary

Capacity Analysis:  Evaluate flows & loads  Engineering calculations – MAHLs, AORs, organic loading, hydraulics  Identify processes with insufficient capacity – Headworks ? Secondary Trt?

 Install more blowers  Switch out media (e.g. rock trickling filter  plastic media)  Add media to aeration tanks (e.g. Conventional AS  IFAS)  Construct influent equalization

 Construct parallel treatment units  Expand existing tanks – deeper SWD  Add roughing and/or polishing treatment

 Negotiate with industry to pay for upgrade  All? Definitely pay their fair share (“proportionate”)  Have industry pay for a portion of upgrade  Especially effective if a WWTF upgrade is planned already and a few additional improvements are needed to accommodate the industry  MEDC or Economic Development Authority  In conjunction with USDA RD grant/loan; SRF

Capacity Analysis:  Blueberry Processor  Pickle Processors

 Groundwater discharge … no longer an option  WWTP Improvements were needed (switch from groundwater to surface water discharge)  Identified Industry needs discussed future BOD Trt needs vs production  GREAT Marriage (win-win) of  Tanks with available treatment volume … minimum HRT  A home for Lots of MBBR plastic media … enough for berries  “Tell ya what … buy s’more plastic and couple of blowers, we’ll call it good, Vinnie” Then, we’ll dedicate the service capacity.

Lagoon MBBR

Lagoon MBBR

 COD in lieu of BOD5 This is so Important Shows up in the anaerobic digester, not Aeration Tank Acetic/lactic acid is biodegradable  Seasonality of loading is large Like clockwork- peaking in August  Biogas production is (mostly) wonderful  Historic odor & corrosion in 27 mile FM big problem  Slug loading noted at the digester AND big biogas

100000 Pickle ckle Production uction takes es 90000 off in Mid id-Augus ugust 80000 70000 60000 ay) as (cf/day 50000 Biogas 40000 30000 20000 Actual Biogas Low Estimate of Theoretical 10000 High Estimate of Theoretical 0 08/03/12 08/23/12 09/12/12 10/02/12 10/22/12 11/11/12 12/01/12 12/21/12 01/10/13 Date

 COD in lieu of BOD5 Sticks well on biofilm/media (if no digester)  Project in the planning/preliminary design phase  Review of industrial flow/BOD

 Surcharges were applied based on BOD5 How well did that reflect the loading? (COD not BOD5)  Two-stage attached growth is great NPDES protection No biomass “washout” + biofilm “pockets”   Expansion is desired – Over Doubling!  (see previous steps)  Recommendation: Treat at the POTW, increase capacity