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41420094JOURNALOFHARBININSTITUTEOFTECHNOLOGYVol141No14Apr.2009MUCT1,2,1,2,2,2(1.,150090,smile_xl@tom.com;2.,130021):,MUCT,.:15,Microthrixparvicella,,,SVI381mL/g;2516d2151Microthrixparvicella,,36d,SVI127mL/g;CODTP,TN,.:MUCT;;;:X70311:A:0367-6234(2009)04-0067-05OccurrenceandcontrolofsludgebulkingunderlowtemperatureinMUCTprocessWANGXiao2ling1,2,YINJun1,2,YELong2,WUXiang2hui2(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China,smile_xl@tom.com;2.SchoolofMunicipalandEnvironmentalEngineering,JilinArchitecturalandCivilEngineeringInstitute,Changchun130021,China)Abstract:Inordertofurtherfindoutthefactorscausingsludgebulkingandestablishthecorrespondingcon2trolstrategies,theeffectoflowtemperatureonsludgesettlingcharacteristicsandthecontrolstrategiesforin2hibitingthegrowthoffilamentousbacteriawereinvestigatedbasedonMUCTprocesses.Theresultsshowthatthesludgebulkingoccursinthereactorduetothealterationofactivatedsludgesstructureatthereactiontemperaturebelow15,whichresultsintheexcessivegrowthofmicrothrixparvicella,andthemaximumSVIvaluereaches381mL/g.Theexcessivegrowthofmicrothrixparvicellacanbeefficientlyinhibitedbycontrol2lingthereactiontemperatureat251,decreasingSRTto6days,anddecreasingthenitraterecirculationratioto215orincreasingthemixedliquorrecirculationratioto1.TheSVIvalueisdecreasedto127mL/gaftertheoperationfor36days.ThegoodremovalefficienciesofCODandTPareachievedduringthebul2kingandreestablishingperiods.TheremovalefficiencyofTNisalsogoodduringthebulkingperiods,buttheadverseresultisthatitsremovalrateisreducedwiththedecreaseofSRTduringthereestablishingperiods.Keywords:MUCTprocess;sludgebulking;reactiontemperature;sludgeretentiontime:2007-10-11.:(863-2004601020-03).:(1977),,;(1954),,,.,(BNR)[1-3].BNR:BNR,[4-10].,BNR.,DO,[11].,SBRA/OpH,[12-14].,BNR,MUCT.1111MUCT1.,,90L,3,(18L)(27L)(45L).:2,3,5.,.,.,.(52)(11)s.10L/h.pH7,DO24mg/L[15].c,Zhu[16].1MUCT112(SVI),SVI150mL/g,,.CODTPTNNO3--NSV%MLSSSVIpHDO,..DOpHWTW-pH/OXi340.113,2176mL/L0112g/L0103g/L0105g/L0101g/L0125g/L.1.1mgL-1CODCrBOD5NH4+-NTNTP/28018/1871221514/110194912/20105113/2213715/419269131611539134114712.20065,.2,,.141d,.MUCT2.2MUCT/d/168=215,=1,s=1,t=25/69140=215,=1,s=015,t=1726,c=15d/141167=3,=015,s=015,t=1115,c=15d/168190=215,=1,s=015,t=1922,c=6d/191204=215,=1,s=015,t=25,c=6d864122112141dMUCTSVI.2,SVI141d,146d173mL/g,166d381mL/g,.,,,,.,3.OlympusBX51,OlympusUplanFI40X,OlympusWHO10X,4010.,Loeffler.,,,.,.SVI,.2MUCTSVIEikelboom,,[17].Microthrixparvicella.,,(013015m/d),,200500m,,COD.:1215(),012kg2BOD/(kgMLSSd),DO,(40%).,SVI250mL/g,490mL/g.20,012kgBOD/(kgMLSSd),Microthrixparvicella3080m,15dSVI150mL/g;012kgBOD/(kgMLSSd),1215,,1011dSVI150mL/g[3,18,19].3MicrothrixparvicellaMUCT,2:15,.MUCT20065,,251.,,.,,1726,,.,,.,10,141d15.01080116kgBOD/(kgMLSSd),15d,,Microthrixparvicella.MUCT,,,.,.2,,3,.,964,:MUCT,,,,,Microthrixparvicella.,,;,,COD,COD.,,Microthrixparvicella.212Microthrixparvicella,,:.15Microthrixparvicella,Microthrixparvicella..Microthrixparvicella,,..,,..,COD,COD,.2,SVI2.2,,36d,SVI166d381mL/g204d127mL/g.,.2,SVI381mL/g246mL/g,257238mL/g.:,11,,1,122319,122,,519.Microthrixparvicella,.,Microthrixparvicella,.251.,SVI,204d127mL/g,.213CODTNTP,3h,Microthrixparvicella,,,,MUCTCODTP,,4,5.COD187116280180mg/L,515322158mg/L,9214%9813%;TP41917145mg/L,01040131mg/L,8714%98103%.4COD6TN.6,TN,.TN3512543136mg/L,613211113mg/L,74127%82105%.(6d),TN,TN24mg/L,42124%,.5TP07416TN31)MUCT146d,SVI173mL/g,,SVI,166d381mL/g.2)Eikelboom,,Microthrixparvicella.Microthrixparvicella,15,.3)6d2151SVI127mL/g,.4),,,.:[1]TSAIMW,WENTZELMC,EKAMAGA.TheeffectofresidualammoniaconcentrationunderaerobicconditionsonthegrowthofMicrothrixparvicellainbi2ologicalnutrientremovalplants[J].WatRes,2003,37:3009-3015.[2]WAGNERM,LOYA.Bacterialcommunitycomposi2tionandfunctioninsewagetreatmentsystems[J].CurrOpinBiotechnol,2002,13(3):218-227.[3],.[J].,2006,38(6):887-892.[4]XIEB,DAIXC,XUYT.Causeandpre-alarmcontrolofbulkingandfoamingbyMicrothrixparvicellaAcasestudyintripleoxidationditchatawastewatertreatmentplant[J].JournalofHazardousMaterials,2007,143:184-191.[5]SCRUGGSCE,RANDALLCW.Evaluationoffila2mentousmicroganismgrowthfactorsinanindustrialwastewateractivatedsludgesystem[J].WatSciTech,1998,37(4-5):262-270.[6]MADONIP,DAVOLID,GIBING.Surveyoffila2mentousmicroorganismsfrombulkingandfoamingac2tivated-sludgeplantsinItaly[J].WatRes,2000,34(6):1767-1772.[7],,.[J].,2006,7(5):1-9.[8]MARIAR.Operationwithbiologicalnutrientremovalwithstablenitrificationandcontroloffilamentousgrowth[J].WatSciTech,1998,37(4/5):549-554.[9]ANDREASENK,SIGVARDSENL.Experienceswithsludgesettleabilityindiferentprocessalternativesfornutrientremoval[J].WatSciTech,1996,33(12):137-146.[10],,.[J].,2005,27(4):266-268.[11],,,.[J].,2006,26(5):54-56.[12],,.[J].,2007,29(1):117-121.[13],,,.C/N[J].,2007,27(1):59-63.[14].[D].:,2004.[15]MULKERRINSAD,DOBSONAADW,COLLE2RANE.Parametersaffectingbiologicalphosphatere2movalfromwastewaters[J].EnvironmentInternation2al,2004,30:249-259.[16]ZHUGB,PENGYZ,WANGSY.Hydraulicmeth2odofcontrollingsolidsrete