Pilot Testing of MBBR and IFAS Treatment Processes

Pilot Testing of MBBR and IFAS Treatment Processes for Nitrification and Denitrification at the Mamaroneck WWTPPILOTTESTINGOFMBBRANDIFASTREATMENTPROCESSESFORNITRIFICATIONANDDENITRIFICATIONATTHEMAMARONECKWWTPNancyChoi*,HeatherPhillips*,Dr.TerryL.Johnson*,RalphButler**,ThomasLauro****Black&VeatchCorporation489FifthAvenue12thFloorNewYork,NewYork10017**WestchesterCountyDepartmentofPublicWorks***WestchesterCountyDepartmentofEnvironmentalFacilitiesABSTRACTTheMamaroneckWWTPisoneoffourWWTPsinWestchesterCountythattheNewYorkStateDepartmentofEnvironmentalConservation(NYSDEC),throughitsStatePollutionDischargeEliminationSystem(SPDES),imposedWasteLoadAllocation(WLA)limitsfornitrogenbecauseofitsdischargeintotheLongIslandSound.ThefocusofthisPilotStudywasintendedtotesttheabilityofbothMovingBedBiofilmReactor(MBBR)processandIntegratedFixed-filmActivatedSludge(IFAS)processformeetingfutureloweffluenttotalnitrogenlimitsofapproximately4mg/L.Thesetwoprocessesareworthwhileforthissitebecause(1)averyhighleveloft