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1、UnitedStatesOfficeofWaterEPA832-F-99-073EnvironmentalProtectionWashington,D.C.September1999AgencyWastewaterTechnologyFactSheetSequencingBatchReactorsDESCRIPTIONprocesseswouldbeaccomplishedbyusingseparatetanks.Thesequencingbatchreactor(SBR)isafill-and-drawactivatedsludgesyste
2、mforwastewaterAmodifiedversionoftheSBRistheIntermittenttreatment.Inthissystem,wastewaterisaddedtoaCycleExtendedAerationSystem(ICEAS).Inthesinglebatchreactor,treatedtoremoveICEASsystem,influentwastewaterflowsintotheundesirablecomponents,andthendischarged.reactoronacontinuousb
3、asis.Assuch,thisisnotEqualization,aeration,andclarificationcanallbeatruebatchreactor,asistheconventionalSBR.Aachievedusingasinglebatchreactor.TooptimizebafflewallmaybeusedintheICEAStobufferthistheperformanceofthesystem,twoormorebatchcontinuousinflow.Thedesignconfigurationsof
4、thereactorsareusedinapredeterminedsequenceofICEASandtheSBRareotherwiseverysimilar.operations.SBRsystemshavebeensuccessfullyusedtotreatbothmunicipalandindustrialDescriptionofaWastewaterTreatmentPlantwastewater.TheyareuniquelysuitedforUsinganSBRwastewatertreatmentapplicationsc
5、haracterizedbyloworintermittentflowconditions.AtypicalprocessflowschematicforamunicipalwastewatertreatmentplantusinganSBRisshownFill-and-drawbatchprocessessimilartotheSBRinFigure1.Influentwastewatergenerallypassesarenotarecentdevelopmentascommonlythought.throughscreensandgri
6、tremovalpriortotheSBR.Between1914and1920,severalfull-scalefill-and-Thewastewaterthenentersapartiallyfilledreactor,drawsystemswereinoperation.InterestinSBRscontainingbiomass,whichisacclimatedtothewasrevivedinthelate1950sandearly1960s,withwastewaterconstituentsduringprecedingc
7、ycles.thedevelopmentofnewequipmentandtechnology.Oncethereactorisfull,itbehaveslikeaImprovementsinaerationdevicesandcontrolshaveconventionalactivatedsludgesystem,butwithoutaallowedSBRstosuccessfullycompetewithcontinuousinfluentoreffluentflow.Theaerationconventionalactivatedsl
8、udgesystems.andmixingisdiscontinuedafterthebiologicalreactionsarecomplete,t
