Startup of Post Denitrification MBBR Pilot to Achi

Startup of Post Denitrification MBBR Pilot to Achieve Limit of Technology at Blue Plains AWTPStartupofPostDenitrificationMBBRPilottoAchieveLimitofTechnologyatBluePlainsAWTPMarijaPeric1*,DilliNeupane1,BeverleyStinson1,EdwardLocke1,KathleenKharkar1,SudhirMurthy2,WalterBailey2,SalilKharkar2,NicholasPassarelli2,JohnCarr2,RoubenDerMinassian2,George(Yi-Ming)Shih21Metcalf&Eddy,14504GreenviewDrive,Suite400,Laurel,MD,207082DCWASA,5000OverlookAvenueSW,WashingtonDC,20032*Email:marija.peric@m-e.aecom.comABSTRACTKEYWORDSPostDenitrification,MBBR,LimitofTechnology,ENRINTRODUCTIONTheDistrictofColumbiaWaterandSewerAuthority(DCWASA)isinvestigatingcost-effectiveandreliableprocessalternativestomeetalimitoftechnology(LOT)totalnitrogen(TN)andtotalphosphorus(TP)effluentrequirements.OneofthealternativeprocessapproachesunderconsiderationincorporatesaninnovativeMovingBedBiofilmReactor(MBBR)technologyasadenitrificationpolishingstepdownstreamoftheexistingnitrification/denitrificationactivatedsludgesystem.DCWASAcu