SidebySide PilotScale Comparison of IFAS and MBBR

SidebySide PilotScale Comparison of IFAS and MBBR Processes Operated at Varying DO ConditionsSide-by-SidePilot-ScaleComparisonofIFASandMBBRProcessesOperatedatVaryingDOConditionsNicholasLandes1*,ChristopheDesmottes1,andSunilMehta11DegremontNorthAmericanResearchandDevelopmentCenter,Richmond,Virginia*Email:nicholas.landes@infilcodegremont.comABSTRACTThecurrentstudyconductedaside-by-sideevaluationofsingle-stageIFASandMBBRprocessesforconcomitantcarbonoxidationandnitrificationofaprimaryeffluent.BothprocesseswerecomparedasafunctionofDO,temperature,andpollutantloadingrate.Ofparticularinterest,thestudysoughttoidentifythelowestresidualDOconcentrationthatsupportedeffectivenitrificationinthepresenceoforganiccarbon.Throughoutthestudy,medianpercentammoniumremovalwas90%and70%forIFASandMBBRprocesses,respectively.Forbothpilots,ammoniumremovalratesincreasedwithincreasingDO;however,astheammoniumloadingratewasdecreased,thedependenceofnitrificationratesonresidualDOwasdampened.AsresidualDOconcentrationsdecr