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1、ELSEVIERWaterResearch38(2004)3340-3348WATERRESEARCH**u.cboKr.conVlcKatc/*alrc>Integratedreal-timecontrolstrategyfornitrogenremovalinswinewastewatertreatmentusingsequencingbatchreactorsJu-HyunKima'*,MeixueChenb,NaohiroKishidac,RyuichiSudoaaCenterforEnvironmentalScienceinSaitama,
2、914.Kamitanadarc,Kisai,Saitama347-0115.JapanbStateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-EnvironmcntalSciences,ChineseAcademyofSciences,Beijing100085,P.O.Box2871,ChinacDepartmentofEnvironmentalResourcesEngineeringsWasedaUniversity,3-4-1Okubo.Shinjuku-
3、ku,Tokyo169:8555,JapanReceived7May2003;receivedinrevisedform29March2004:accepted11May2004AbstractAnewintegratedreal-timeconlrolsystemwasdesignedandoperatedwithfluctuatinginnuentloadsforswinewastewatertreatment.Thesystemwasoperatedwithautomaticadditioncornrolofanexternalcarbonso
4、urce,usingreal-timecontroltechnology,whichutilizedtheoxidation-reductionpotential(ORP)andthepHasparameterstocontroltheanoxicphaseandoxicphase,respective!y.Thefluctuationsinswinewastewaterconcentrationareextreme;aninfluentwithalowC=Nratioisdeficientinorganiccarbon,andalowcarbons
5、ourcelevelcanlimittheoverallbiologicaldenitrificationprocess・Consequently,asufficientorganicsourcemustbeprovidedforproperdenitrification.Thefeasibilityofusingswinewasteasanexternalcarbonsourceforenhancedbiologicalnitrogenremovalwasinvestigated・Thereal-timecontrolmadeitpossiblet
6、ooptimizethequantityofswinewasteaddedastheloadfluctuatedfromcycletocycle.TheaverageremovalefficienciesachievedforTOCandnitrogenwereover94%and96%,respectively,usingtheintegratedreal-timecontrolstrategy.r2004ElsevierLtd.Allrightsreserved.Keywords:Denitrification;Externalcarbonsou
7、rce;ORPReal-timeconlrol;SBR;Swinewastewater1.IntroductionSwinewastewaterhaspreviouslybeenconsideredasoneofthemajorsourcesofnitrogenpollutiondis-chiirgedintotheenvironment.Traditionalbiologicalremovalofnitrogenwasachievedbyasequenceofnitrificationanddenitrificationprocesses・Sinc
8、ethefluctuationsinswinewastewaterconcentrationareextre
