A Pilot-Scale Comparison of IFAS and MBBR to Achie

A Pilot-Scale Comparison of IFAS and MBBR to Achieve Very Low Total Nitrogen ConcentrationsWaterPractice™•Vol.1•No.5©2007WaterEnvironmentFederation•doi:10.2175/193317707X256937APilot-ScaleComparisonofIFASandMBBRtoAchieveVeryLowTotalNitrogenConcentrationsTerryL.Johnson1*,AndrewShaw1,HeatherPhillips1,NancyChoi1,ThomasLauro2,RalphButler3,LeahRadko31Black&VeatchCorporation,KansasCity,Missouri64114.2WestchesterCountyDepartmentofEnvironmentalFacilities.3WestchesterCountyDepartmentofPublicWorks.*Towhomcorrespondenceshouldbeaddressed:johnsontl@bv.com.ABSTRACTInnorthernEurope,theMovingBedBiofilmReactor(MBBR)process,whichusesequipmentalmostidenticaltothatusedfortheIntegratedFixed-filmActivatedSludge(IFAS)processbuthasonlyanattached-growthbiomass,hasproventobeagoodnutrientremovalchoiceforfacilitiesthattreatlow-strengthwasteandoperateatlowtemperatures.PilottestingofbothprocesseswascarriedoutattheMamaroneckwastewatertreatmentplantinWestchesterCounty,NewYork,whereconditionsaresimilartothoseencounter