低负荷氧化沟系统中EPS与活性污泥沉降性能的关系刘珮

33620136ActaScientiaeCircumstantiaeVol．33No．6Jun．2013No．50878108No．2007E201SupportedbytheNationalNaturalScienceFoundationofChinaNo．50878108andtheNaturalScienceFoundationofShaanxiProvinceNo．2007E2011987—[e-mail]*[e-mail]1987—[e-mail]*[e-mail]dactivatedsludgesedimentationperformanceinthelow-loadoxidationditchsystemJ．ActaScientiaeCircumstantiae3361611-1615EPS刘珮，袁林江*，陈希，鲁文娟7100552012-05-052013-02-212013-02-22．EPS．EPSEPSSVIEPSSVI．EPS、．EPS．EPS．EPS0253-2468201306-1611-05X703ARelationshipbetweenEPSandactivatedsludgesedimentationperformanceinthelow-loadoxidationditchsystemLIUPeiYUANLinjiang*CHENXiLUWenjuanKeyLaboratoryofNorthwestWaterResourcesEnvironmentandEcologyofMinistryofEducationXi'anUniversityofArchitectureandTechnologyXi'an710055Received5May2012receivedinrevisedform21February2013accepted22February2013AbstractSludgebulkingisacommonprobleminoperationofoxidizationditchsystem．Toilluminatethemechanismofthesludgebulkingalab-scaleintermittentaerationandcontinuousflowoxidationditchsystemwasestablishedandappliedtostudytherelationshipbetweenEPSofsludgeanditssedimentationperformanceunderdifferentoperatingconditions．Solublestarchwasusedasthesolecarbonsource．Theresultsshowedthatfilamentousbulkingofthesludgeinthesystemoccurredatlowload．BothcontentofEPSandproteinamountintheEPShadadistinctnegativelinearrelationshipwithSVIofthesludgebutthecarbohydratecontentdidnot．ThecontentofEPSroseaftersludgeloadincreasedalongwithimprovementofsludgesedimentationperformance．WeconsideredthatthegrowthoffilamentousbacteriumwasthekeyfactorforthesludgebulkinginthesystemratherthanthedecreaseofEPSinthesludgeunderlowloadconditionandthescarcityofreadilybiodegradablecarbonsourceforbacteriuminthesludge．ItwasbelievedthataffectingtheEPScontentoftheactivatedsludgecouldnotresultinthefilamentoussludgebulkingunderlowsludgeloadconditionintheODsystem．KeywordsEPSoxidizationditchsystemfilamentoussludgebulking1IntroductionExtracellularPolymericSubstancesEPS、、、．EPS．EPS、Lietal．2007Parketal．2007Martinsetal．2011Yuanetal．2011．MBREPSDOI:10.13671/j.hjkxxb.2013.06.019332007．Forster1980EPS、SVIEPSEPS．2004EPSEPSSVIDOEPSEPSSVI．EPSEPS2011．EPS、．．EPSSVI．EPS．2Materialsandmethods1-1．2．3．4．5．6．7．8．9．Fig．1Schematicdiagramofanaerobicselector-intermittentaerationandcontinuousflowoxidationditchsystem1．influenttank2．feedingpump3．anaerobicselector4．oxidationditch5．submergedpump6．time-controller7．aerationpump8．settlingtank9．sludgepump2．11-．2500～2800mg·L－120d．35min．42L16h30cm1．4m20．1m·s－1．．40min32min/．0．15～0.18kg·kg－1·d－1kgMLSSCOD．2．2、-COD400mg·L－1BOD5∶N∶P=100∶5∶1Bracklowetal．20071．A2/O．28d．30min3．1Table1Compositionofthesynthesizedwastewater/g·L－1/g·L－10．40．0760．01760．010．10．08mL·L－1．2．3EPSCEREPSForlundetal．19962006．DowexMarathonCsodiumform70g·g－1∶VSSPBS1h．4℃、8000g5min10mLPBS3．10mL25W5min．4℃、400r·min－14hEPS．EPS12000g、4℃15minEPS．0．45μm、、．FolinDNA．21616EPS3Results3．11．SVI53EPS2．、SVIEPS230mg·g－1VSS50mg·g－1VSSEPS210mg·g－1VSS40mg·g－1VSS．2SVI-EPSFig．2ConstitutionsofEPSunderdifferentSVIintheOD、EPSSVI38．3～12.6mg·g－1VSS．3EPS、EPSSVIFig．3RelationshipbetweenproteincontentintheEPSEPScontentandSVIofthesludge42EPS．SVI218mL·g－1467mL·g－14SVI×10Fig．4MicroscopiesofthesludgeunderdifferentSVI×103161330．6mm1．0～1．3mm．500μm260μm．0．40kg·kg－1·d－135dSVI240mL·g－1．．3．2EPS2011、EPS2004EPS．EPS、、DNAEPSVandenDierdonck2012EPSLiao2011SBREPSSVI．EPS．EPSSVIEPS．．2008Bracklowetal．2007．．EPS．EPS、SVI．．“”EPS20042008EPS、SVI．EPS2004Lietal．2007Al-Halbounietal．2008Wilénetal．2008Yangetal．2009Badireddyetal．2010BalaSubramanianetal．2010Martinsetal．2011EPS．EPSEPSShinetal．2000．EPS．EPS、EPSYeetal．2000Yeetal．2011．4Conclusions1．SVIEPSEPSSVI．EPSSVIEPSSVI．EPS．2EPS．3EPS．ReferencesAl-HalbouniDTraberJLykoSetal．2008．CorrelationofEPScontentinactivatedsludgeatdifferentsludgeretentiontimeswithmembranefoulingphenomenaJ．WaterRes426/71475-1488BadireddyARChellamSGassmanPLetal．2010．Roleofextracellularpolymericsubstancesinbioflocculationofactivatedsludgemicroorganismsunderglucose-controlledconditionsJ．WaterRes44154505-4516BalaSubramanianSYanSTyagiRDetal．2010．ExtracellularpolymericsubstancesEPSproducingbacterialstrainsofmunicipalwastewatersludgeisolationmolecularidentificationEPS41616EPScharacterizationandperformanceforsludgesettlinganddewateringJ．WaterRes4472253-2266BracklowUDrewsAVocksMetal．2007．Comparisonofnutrientsdegradationinsmallscalemembranebioreactorsfedwithsynthetic/domesicwastewaterJ．JournalofHazardousMaterials1443620-626ForlundBPalmgrenRKeidingKetal．1996．ExtractionofextracellularpolymersfromactivatedsludgeusingacationexchangeresinJ．WaterResearch3088881749-1758ForsterCFDallas-NewtonJ．1980．ActivatedsludgeonsettlementsomesuppositionsandsuggestionJ．WaterPollutionControlJ．793338-351．2007．EPSMBRJ．1259-61．2006．J．71141-44LiXYYangSF．2007．InfluenceoflooselyboundextracellularpolymericsubstancesEPSontheflocculationsedimentationanddewaterabilityofactivatedsludgeJ．WaterRes4151022-103