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1、ARTICLEINPRESSWaterResearch38(2004)3340-3348Integratedreal-timecontrolstrategyfornitrogenremovalinswinewastewatertreatmentusingsequencingbatchreactorsJu-HyunKima,*,MeixueChenb,NaohiroKishidac,RyuichiSudoaaCenterforEnvironmentalScienceinSaitama,914,Kamitanadare,Kisai,Saitama347-0115,JapanbStat
2、eKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,P.O.Box2871,ChinacDepartmentofEnvironmentalResourcesEngineering,WasedaUniversity,3-4-1Okubo,Shinjuku-ku,Tokyo1698555,JapanReceived7May2003;receivedinrevisedform29Mar
3、ch2004;accepted11May2004AbstractAnewintegratedreal-timecontrolsystemwasdesignedandoperatedwithfluctuatinginfluentloadsforswinewastewatertreatment.Thesystemwasoperatedwithautomaticadditioncontrolofanexternalcarbonsource,usingreal-timecontroltechnology,whichutilizedtheoxidation-reductionpotenti
4、al(ORP)andthepHasparameterstocontroltheanoxicphaseandoxicphase,respectively.Thefluctuationsinswinewastewaterconcentrationareextreme;aninfluentwithalowC=Nratioisdeficientinorganiccarbon,andalowcarbonsourcelevelcanlimittheoverallbiologicaldenitrificationprocess.Consequently,asufficientorganicso
5、urcemustbeprovidedforproperdenitrification.Thefeasibilityofusingswinewasteasanexternalcarbonsourceforenhancedbiologicalnitrogenremovalwasinvestigated.Thereal-timecontrolmadeitpossibletooptimizethequantityofswinewasteaddedastheloadfluctuatedfromcycletocycle.Theaverageremovalefficienciesachieve
6、dforTOCandnitrogenwereover94%and96%,respectively,usingtheintegratedreal-timecontrolstrategy.r2004ElsevierLtd.Allrightsreserved.Keywords:Denitrification;Externalcarbonsource;ORPReal-timecontrol;SBR;Swinewastewater1.IntroductionSwinewastewaterhaspreviouslybeenconsideredasoneofthemajorsourcesofn
7、itrogenpollutiondis-chargedintotheenvironment.Traditionalbiologicalremovalofnitrogenwasachievedbyasequenceofnitrificationanddenitrificationprocesses.Sincethefluctuationsinswinewastewaterconcentrationareextremeduetothevaryingpracticesofmanurem
