Differences in Aeration and Air Scour Energy Requi

Differences in Aeration and Air Scour Energy Requirements between Membrane BioreactorsDIFFERENCESINAERATIONANDAIRSCOURENERGYREQUIREMENTSBETWEENMEMBRANEBIOREACTORS,CONVENTIONALACTIVATEDSLUDGE(CAS),IFASANDMBBRFOLLOWINGPROCESSOPTIMIZATIONDipankarSen1,GeorgeCrawford2,DaveCommons31SantaClaraValleyWaterDistrict/Aquifas1290BryantAvenue,MountainView,CA940402CH2MHill3SanBernardinoMunicipalWaterDepartmentABSTRACTHollowfibermembranebioreactors(MBRs)wereevaluatedinfullscaletostudymethodsofreducingtheiraerationandairscourenergyrequirements.Thechangesweremodeledtodeterminemethodstooptimizetheaerationandairscourenergyconsumptionandcomparethetotaltotheaerationenergyrequirementsofconventionalactivatedsludge(CAS),IFASandMBBRsystems.TheresearchfoundthattheaerationandairscourenergyrequiredforanMBRcanbereducedtowithin33%aboveconventionalactivatedsludge(CAS)systemsoperatingwith50percentmorevolume(AerationOptimizedMode,AOM).Itcanbereducedfurthertowithin20%withautomatedDOandammonium-Nmonitoringandcontrolinthe