effects of a novel degreaser on fog accumulation, membrane performance, and effluent ... · 2018....
TRANSCRIPT
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EffectsofaNovelDegreaseronFOGAccumulation,MembranePerformance,andEffluent
Compliance
NEWEAAnnualMeeting,Jan2018
PatrickAntle,Ph.D.DavidElmerCoreyRepucciPaulDenaro
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Fat,Oil,andGrease(FOG)Problems
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FOGProblemsSolved• Foodserviceestablishments• Collectionsystems• Pumpstations
• Pipes(jetting)• In-plant“troublespots”
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ChemicalandBiologicalMechanismsBacteria/Enzymes SurfactantsCaustics
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NovelProtein-basedDegreaser
• Nobacteria,noenzymes,nodetergents• Differentmechanism!
• Proteinsdisruptintermolecularforces• Preventlarge,stickyballsoffat• FacilitateconversionofindividualFOGmolecules
• Reactionbyproductwillnotre-solidify
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MiddlesexSchool
• Prestigiousprepschool• 395Students(dayandboarding)• 1dininghall
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MiddlesexSchoolWareHall
• 1,000mealsperday
• 1gravitygreaseinterceptor(GGI)• 5,000gallons• Replacedin2016• Historyofclogs
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WareHallGGIBeforeTreatment
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Downstreamtreatmentplant• Allinfluentcomesfromschool• 22KGPDwhenschoolinsession• Membranetreatmentprocess
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Treatmentmethod• ProteinMatrixPM-1addedtosinkdrain• Dispensertimedtoalignwithdishwashing
• 27-35oz.(0.27gal)perday
• Alternateperiodsofnegativecontrolandchemicaladdition
• Examineinfluentandeffluentresponseandmembraneperformance• Weeklysampling
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Analysisparameters
• GGI• Accumulation/SSO
• Influent• BOD• TSS
• Effluent• BOD• TSS• Ammonia
• Plantperformance• Membranepressuredrop• MLSS• Visualinspection+observation• Consultationwithoperators
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Results– NoFOGAccumulation
• Membranesperformingnormally• nosignoffouling
• MLSSreadingsinlinewithhistoricalvalues
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0102030405060708090100
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oz/day
mg/L
MiddlesexSchoolWWTFDegreaserTreatmentTimeline
InfBOD(mg/l) InfTSS(mg/l) EFFTSS(mg/l) FeedRate(oz/day) EffBOD(mg/l)
Results– TreatmentProcess
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Conclusions&NextSteps• Noadverseresponsetotreatment• Upstream:accumulationorclogs• Downstream:Influent,effluent,membrane
• Nextsteps:• Continuedtreatmentandmonitoring• Largerisolatedfacility