Three controllab_省略_ of EGSB reactor_李慧莉

JournalofHarbinInstituteofTechnology(NewSeries),Vol.15,No.3,2008ThreecontrollablefactorsofsteadyoperationofEGSBreactorLIHui-li1,LUBing-nan1,LIFang2李慧莉,吕炳南,李芳(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China,E-mail:hemagogo@tom.com;2.SchoolofArchitectureEngineering,DaqingPetroleumInstitute,Daqing163318,China)Abstract:Thebench-scaleEGSB(expandedgranularsludgebed)reactorwasoperatedtostudytheeffectofsludgeloadingrate,pHvalueandnutrientelementontheoperationoftheEGSBreactorandthecontrolruleofthesefactors.Continuousflowwasusedtotreatsyntheticwastewatercontainingdextroseandbeer,andthetem-peratureofreactorwascontrolledatmesophilestemperature(33℃).Theexperimentalresultsdemonstratedthatthepropersludgeloadingratewas0.9-1.42kgCOD/(kgVSS·d);thepHvalueinthereactorwascon-trolledbyaddingsodiumbicarbonate,theproperadditivequantitywas1000-1200mg/L;theadditivequantityofnutrientelementwasasfollows:41.3mg/(SS·d)ofFeCl2·4H2O,4.3mg/(SS·d)ofCoCl2·6H2O,8.2mg/(SS·d)ofNiCl2·6H2O,7.5-13mg/(SS·d)ofCaCO3,and56.7-22.7mg/(SS·d)of7Na2S·9H2O,respectively.Whentheseparameterswereproperlydetermined,theEGSBreactorcouldtreatwastewaterwith400-5000mg/LCODconcentration.TheCODremovalefficiencywasover85%.Theopera-tionoftheEGSBreactorwassteadyandtheEGSBreactorhadstronganti-shockloadability.Keywords:EGSBreactor;organicloadingrate;pHvalue;nutrientelementCLCnumber:X703.1Documentcode:AArticleID:1005-9113(2008)03-0411-04ExpandedGranularSludgeBedwasdevelopedbyWageingenAgricultureUniversityinHollandatthebe-ginningof1990.Thetechniquewasconcreteapplicationofsolid-flowedtechniqueontreatingwithorganicwastewater.TheEGSBhadtheadvantageoftheUASBreactorandtheAFBreactorasretaininghighsludgeconcentration,highsludge-liquidcontact,mixefficiencyandhighorganicloadingrate.TheEGSBreactorwasusedtotreatnotonlyorganicwastewaterwithhighcon-centrationbutalsoorganicwastewaterwithmoderateandlowconcentration.Thehighefficientanaerobicbioreac-torisprospectiveinwastewatertreatmentfield[1-3].Thestudya