常温处理生活污水微氧高效颗粒污泥反应器内颗粒污泥性能研究

2912200912ActaScientiaeCircumstantiaeVo.l29,No.12Dec.,2009:(No.20070311041);(No.07021003,091008)SupportedbytheScienceandTechnologyProgramofShanxiProvince(No.20070311041)andtheScienceandTechnologyDevelopmentProjectofTaiyuanCity(No.07021003,091008):(1970),,();*(),Emai:[e-mail]:DONGChunjuan(1970),female,professor(Ph.D.);*Correspondingauthor,Emai:[e-mail],,,.2009.[J].,29(12):2504-2509DongCJ,LiuX,ChenSY,etal.2009.Characteristicsofgranulesinahighlyefficientparticulatebiofilmsreactortreatingdomesticwastewateratambienttemperature[J].ActaScientiaeCircumstantiae,29(12):2504-2509董春娟1,*,刘晓2,陈素云1,汪艳霞1,吕炳南21.太原大学环境工程系,太原0300092.哈尔滨工业大学市政与环境工程学院,哈尔滨150090:20090404:20090515:20090925:(EGSB),15~26EGSB.,15~26EGSB11~79m!h-1,,,28g!L-1(MLSS),93.4%83.8%74.7%44.0%CODNH+4NTNTP;,;,0.63~2.00mm,89%,,,.,,.,,,EGSB.:EGSB;;;;;:02532468(2009)12250406:X703:ACharacteristicsofgranulesinahighlyefficientparticulatebiofilmsreactortreatingdomesticwastewateratambienttemperatureDONGChunjuan1,*,LIUXiao2,CHENSuyun1,WANGYanxia1,LBingnan21.TaiyuanUniversity,DepartmentofEnvironmentEngineering,Taiyuan0300092.HarbinInstituteofTechnology,SchoolofMunicipalandEnvironmentEngineering,Harbin150090Received4April2009;receivedinrevisedform15May2009;accepted25September2009Abstract:Inordertoanalyzethefeasibilityofhighlyefficientandstableoperationofamicroaerobicexpandedgranularsludgebed(EGSB)reactortreatingactualdomesticwastewateratambienttemperature(15~26),thegranularsludgecharacteristicsincludingactivity,settling,size,andmorphologywereinvestigated.TheresultsshowedthatthemicroaerobicEGSBreactorcouldhaveavelocityof11~79m!h-1,atwhichafewofthegranuleswithlowsettlingvelocitycouldupflowtothebottomoreventothetopofthethreephaseseparator,butwithoutanysludgewashout.ThusthemicroaerobicEGSBreactorcouldhandleahighsludgeconcentrationof28g!L-1withhighremovalefficienciesof93.4%COD,83.8%NH+4N,747%TNand44.0%TP.Thespecificmethanogenicactivityofthegranularsludgeinthemicroaerobicreactordidnotdecrease,andwasevenhigherthaninthestrictlyanaerobicEGSBreactor.Theaveragegranulesizeincreasedandwasmainlydistributedintherangeof0.63~2.00mmwithaweightpercentageof89%,whichcouldensurehighsludgeconcentrationandhighlyefficientmasstransferintheexteriorandinteriorofthegranules,whichultimatelyincreasedthepollutantremovalefficiency.Underthemicroaerobicconditions,themetabolicgroupsofbacteriaindifferentpositionsofthegranulesshoweddistinctchanges.Filamentousbacteriawerepredominantintheperipherallayerofthegranules,whilethefilamentousbacteria,cocc,iandrodshapedbacilliwereallobservedintheinnerlayer.Bacteriaofdifferentmetabolicgroupscontactedcloselyandhadacommunalsynergism,whichcouldoptimizethecooperationbetweenthepartnerorganismsandensurehighlyefficientmasstransferbyreducingthedistanceofdiffusiontransferofmetabolites,andultimatelyensurethehighlyefficientandstableoperationofthemicroaerobicEGSBreactorundertheconditionsofambienttemperature12:andlowconcentration.Keywords:EGSBreactor;microaerobic;ambienttemperature;domesticwastewater;granularsludge;characteristic1(Introduction),.,.,,(Arnaldoetal.,2007).(Haruhikoetal.,2007).,UASB:,;,,(Marioetal.,1997).UASB,EGSB,,.NP,,(Lietal.,2007).EGSB,,,EGSBNP,(Chuetal.,2006).EGSBCOD,NP(Lietal.,2007;Ahietal.,2006;Chuetal.,2005;2006).EGSB,.EGSB,;,,(Zhangetal.,2008;Chouetal.,2007).,EGSB,,EGSB.2(Materialsandmethods)2.1反应器EGSB2.3m,18L.,1.8m,10cm,12L,1.,EGSB.,EGSB(DO).(ORP),.1EGSBFig.1SchematicdiagramoftheexperimentalmicroaerobicEGSBreactorsystem2.2接种污泥2EGSB,VSS/SS36.0g!L-1(MLSS)0.771.41g!g-1!d-1(COD).2.3实验用水,COD263~1145mg!L-1,pH7.4~8.1,NH+4NTNTP26.5~72.1mg!L-131.7~89.1mg!L-13.8~17.7mg!L-1.2.4分析方法ORPpHPHS3C;DODO200;MLSSMLVSS250529(,2004);(Dongetal.,2006);Marriotte(Zengetal.,1996);JSM-5610LV(JEOL,).2.5实验方法EGSB15~269,().1.2~1.8L!h-1,HRT6.7~10.0h,2.5~3.2m!h-1;2.5~3.1L!h-1,HRT3.9~4.8h,2.2~2.9m!h-1.EGSB.,EGSB,,EGSB;,EGSBEGSB.EGSB(L,i1994;,1993).EGSB,.EGSB.,;.3(Results)3.1微氧EGSB反应器运行效果115~26EGSBCODNH+4NTNTP.1,,COD,76%85%,COD88.5%;30d,COD87%~96%,COD92.5%.,NP,,NH+4NTNTP.NH+4NTN,30d,90d52%46%;TP,90d,;120dNH+4NTNTP79%70%33%.(+15mV),5,CODNH+4NTNTP213~867mg!L-126.5~72.1mg!L-131.7~81.7mg!L-13.8~17.3mg!L-1;HRT3.9~4.8h,CODNH+4NTNTP93.4%83.8%747%440%.6NTU.1EGSBCODNH+4NTNTPTable1RemovalofCOD,NH+4N,TNandTPinthemicroaerobicEGSBreactorCOD/(mg!L-1)CODNH+4N/(mg!L-1)NH+4NTN/(mg!L-1)TNTP/(mg!L-1)TP297~46676.0%------296~39688.5%36.9~70.6-66%~11%34.0~56.4-12.0%~5.0%2.6~5.4-50%~14%30d296~61192.5%24.2~53.01%~9%36.0~79.131.0%3.8~14.2-53%~72%90d134~80492.5%29.4~61.352%34.0~83.246.0%4.9~17.73%~79%120d289~51493.0%34.6~54.379%47.2~86.870.0%4.4~18.533%213~86793.4%26.5~72.184%31.7~81.774.7%3.8~17.344%3.2污泥活性的变化,,.,,,,.EGSBMLSS28g!L-1(36g!L-1),MLVSS/MLSS0.740.76.2EGSB,.2,,,.250612:2EGSBFig.2MethanogenicactivityofgranularsludgeinthemicroaerobicEGSBreactor3.3污泥沉速的变化3EGSB.3,,,.4,,11~79m!h-1,11m!h-1,.3EGSBFig.3SettlingrateofgranularsludgeinthemicroaerobicEGSBreactor3.4污泥粒径的变化4EGSB.4,EGSB.,0.25mm23%,0.45~1.25mm,60%;,4EGSBFig.4GranulesizedistributioninthemicroaerobicEGSBreactor250729,0.45~160mm,79%,