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2912200912 ActaScientiaeCircumstantiaeVol.29,No.12Dec.,2009:(No.2007031104-1);(No.07021003,091008)SupportedbytheScienceandTechnologyProgramofShanxiProvince(No.2007031104-1)andtheScienceandTechnologyDevelopmentProjectofTaiyuanCity(No.07021003,091008):(1970—),,();＊(),E-mail:chunjuand@126.comBiography:DONGChunjuan(1970—),female,professor(Ph.D.);＊Correspondingauthor,E-mail:chunjuand@126.com,,,.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150090:2009-04-04 :2009-05-15 :2009-09-25:(EGSB),15～26℃EGSB、、、.,15～26℃EGSB11～79m·h-1,,,28g·L-1(MLSS),93.4%、83.8%、74.7%44.0%COD、NH+4-N、TNTP;,;,0.63～2.00mm,89%,,,.,,、、.,,,EGSB、.:EGSB;;;;;:0253-2468(2009)12-2504-06 :X703 :ACharacteristicsofgranulesinahighlyefficientparticulatebiofilmsreactortreatingdomesticwastewateratambienttemperatureDONGChunjuan1,＊,LIUXiao2,CHENSuyun1,WANGYanxia1,LBingnan21.TaiyuanUniversity,DepartmentofEnvironmentEngineering,Taiyuan0300092.HarbinInstituteofTechnology,SchoolofMunicipalandEnvironmentEngineering,Harbin150090Received4April2009; receivedinrevisedform15May2009; accepted25September2009Abstract:Inordertoanalyzethefeasibilityofhighlyefficientandstableoperationofamicro-aerobicexpandedgranularsludgebed(EGSB)reactortreatingactualdomesticwastewateratambienttemperature(15～26℃),thegranularsludgecharacteristicsincludingactivity,settling,size,andmorphologywereinvestigated.Theresultsshowedthatthemicro-aerobicEGSBreactorcouldhaveavelocityof11～79m·h-1,atwhichafewofthegranuleswithlowsettlingvelocitycouldup-flowtothebottomoreventothetopofthethree-phaseseparator,butwithoutanysludgewashout.Thusthemicro-aerobicEGSBreactorcouldhandleahighsludgeconcentrationof28g·L-1withhighremovalefficienciesof93.4%COD,83.8%NH+4-N,74.7%TNand44.0%TP.Thespecificmethanogenicactivityofthegranularsludgeinthemicro-aerobicreactordidnotdecrease,andwasevenhigherthaninthestrictlyanaerobicEGSBreactor.Theaveragegranulesizeincreasedandwasmainlydistributedintherangeof0.63～2.00mmwithaweightpercentageof89%,whichcouldensurehighsludgeconcentrationandhighlyefficientmasstransferintheexteriorandinteriorofthegranules,whichultimatelyincreasedthepollutantremovalefficiency.Underthemicro-aerobicconditions,themetabolicgroupsofbacteriaindifferentpositionsofthegranulesshoweddistinctchanges.Filamentousbacteriawerepredominantintheperipherallayerofthegranules,whilethefilamentousbacteria,cocci,androd-shapedbacilliwereallobservedintheinnerlayer.Bacteriaofdifferentmetabolicgroupscontactedcloselyandhadacommunalsynergism,whichcouldoptimizethecooperationbetweenthepartnerorganismsandensurehighlyefficientmasstransferbyreducingthedistanceofdiffusiontransferofmetabolites,andultimatelyensurethehighlyefficientandstableoperationofthemicro-aerobicEGSBreactorundertheconditionsofambienttemperatureDOI:10.13671/j.hjkxxb.2009.12.01312:andlowconcentration.Keywords:EGSBreactor;micro-aerobic;ambienttemperature;domesticwastewater;granularsludge;characteristic1 (Introduction),.,.,,、、、(Arnaldoetal.,2007).(Haruhikoetal.,2007).,UASB:,;,,(Marioetal.,1997).UASB,EGSB,,.N、P,,(Lietal.,2007).EGSB,,,EGSBN、P,(Chuetal.,2006).EGSBCOD,N、P(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),.1 EGSBFig.1 Schematicdiagramoftheexperimentalmicro-aerobicEGSBreactorsystem2.2 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+4-N、TNTP26.5～72.1mg·L-1、31.7～89.1mg·L-13.8～17.7mg·L-1.2.4 分析方法ORPpHPHS-3C;DODO200;MLSSMLVSS2505 29(,2004);(Dongetal.,2006);Marriotte(Zengetal.,1996);JSM-5610LV(JEOL,).2.5 实验方法EGSB15～26℃9,().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(Li,1994;,1993).EGSB,、.EGSB.,;.3 (Results)3.1 微氧EGSB反应器运行效果115～26℃EGSBCOD、NH+4-N、TNTP.1,,COD,76%85%,COD88.5%;30d,COD87%～96%,COD92.5%.,N、P,,NH+4-N、TNTP.NH+4-NTN,30d,90d52%46%;TP,90d,;120dNH+4-N、TNTP79%、70%33%.(+15mV),5,COD、NH+4-N、TNTP213～867mg·L-1、26.5～72.1mg·L-1、31.7～81.7mg·L-13.8～17.3mg·L-1;HRT3.9～4.8h,COD、NH+4-N、TNTP93.4%、83.8%、74.7%44.0%.6NTU.1 EGSBCOD、NH+4-N、TNTPTable1 RemovalofCOD,NH+4-N,TNandTPinthemicro-aerobicEGSBreactorCOD/(mg·L-1)CODNH+4-N/(mg·L-1)NH+4-NTN/(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/MLSS0.740.76.2、EGSB,.2,,,.250612:2 EGSBFig.2 Methanogenicactivityofgranularsludgeinthemicro-aerobicEGSBreactor3.3 污泥沉速的变化3、EGSB.3,,,.4,,11～79m·h-1,11m·h-1,.3 EGSBFig.3 Settling