Denitrification Stoichiometry and Kinetics of Movi

Denitrification Stoichiometry and Kinetics of Moving Bed Biofilm ReactorDenitrificationStoichiometryandKineticsofMovingBedBiofilmReactorArbinaShrestha,RumanaRiffat,GeorgeWashingtonUniversity,WashingtonDC,USA;CharlesBott,VirginiaMilitaryInstitute,Lexington,Virginia,USA;ImreTakacs,EnviroSimAssociates,Bordeaux,France;BeverleyStinson,MarijaPeric,DilliNeupane,AECOM,USA;SudhirMurthy,DCWASA,Washington,DC,USAABSTRACTTheMovingBedBiofilmReactor(MBBR)technologywasdeterminedtobeapromisingandviableprocessfordenitrificationtoachievetotalnitrogenofbetween3-4mgN/Landnitrateconcentrationbelow1mgN/L.Apost-denitrifyingpilotMBBRsystemwassetupattheBluePlainsAWTP(AdvancedWastewaterTreatmentPlant)andabenchscalekineticevaluationwasconducted.Thisstudyisacompilationoftheex-situbenchevaluationsofthemediagrowninthepilotreactor.DenitrificationkineticsandstoichiometryofMBBRtechnologyusingmethanolasanexternalcarbonsourcewereinvestigated.Theaveragespecificdenitrificationrates(SDNR)weredeterminedbetween1.3-2.0gNOx-N/m