EffectsofaNovelDegreaseronFOGAccumulation,MembranePerformance,andEffluent

Compliance

NEWEAAnnualMeeting,Jan2018

PatrickAntle,Ph.D.DavidElmerCoreyRepucciPaulDenaro

Fat,Oil,andGrease(FOG)Problems

FOGProblemsSolved• Foodserviceestablishments• Collectionsystems• Pumpstations

• Pipes(jetting)• In-plant“troublespots”

ChemicalandBiologicalMechanismsBacteria/Enzymes SurfactantsCaustics

NovelProtein-basedDegreaser

• Nobacteria,noenzymes,nodetergents• Differentmechanism!

• Proteinsdisruptintermolecularforces• Preventlarge,stickyballsoffat• FacilitateconversionofindividualFOGmolecules

• Reactionbyproductwillnotre-solidify

MiddlesexSchool

• Prestigiousprepschool• 395Students(dayandboarding)• 1dininghall

MiddlesexSchoolWareHall

• 1,000mealsperday

• 1gravitygreaseinterceptor(GGI)• 5,000gallons• Replacedin2016• Historyofclogs

This image cannot currently be displayed.

WareHallGGIBeforeTreatment

Downstreamtreatmentplant• Allinfluentcomesfromschool• 22KGPDwhenschoolinsession• Membranetreatmentprocess

Treatmentmethod• ProteinMatrixPM-1addedtosinkdrain• Dispensertimedtoalignwithdishwashing

• 27-35oz.(0.27gal)perday

• Alternateperiodsofnegativecontrolandchemicaladdition

• Examineinfluentandeffluentresponseandmembraneperformance• Weeklysampling

Analysisparameters

• GGI• Accumulation/SSO

• Influent• BOD• TSS

• Effluent• BOD• TSS• Ammonia

• Plantperformance• Membranepressuredrop• MLSS• Visualinspection+observation• Consultationwithoperators

Results– NoFOGAccumulation

• Membranesperformingnormally• nosignoffouling

• MLSSreadingsinlinewithhistoricalvalues

0102030405060708090100

0

100

200

300

400

500

600

700

oz/day

mg/L

MiddlesexSchoolWWTFDegreaserTreatmentTimeline

InfBOD(mg/l) InfTSS(mg/l) EFFTSS(mg/l) FeedRate(oz/day) EffBOD(mg/l)

Results– TreatmentProcess

Conclusions&NextSteps• Noadverseresponsetotreatment• Upstream:accumulationorclogs• Downstream:Influent,effluent,membrane

• Nextsteps:• Continuedtreatmentandmonitoring• Largerisolatedfacility