臭氧预氧化MBR工艺的膜污染研究

/MBR111121．1500902．100085MBR/O3/MBR。55d1．5mg/L15min。。。DOM254nmO3/MBRDOMMBR500～2000u。。TU991A1000－4602201107－0037－058632007AA06Z339“”2006BAJ08B02StudyonMembraneFoulinginCombinedProcessofPreozonationandMBRLIUTing1CHENZhong-lin1SHENJi-min1WANGZhe1YUWen-zheng21．StateKeyLaboratoryofUrbanWaterResourceandEnvironmentSchoolofMunicipalandEnvironmentalEngineeringHarbinInstituteofTechnologyHarbin150090China2．StateKeyLaboratoryofEnvironmentalAquaticChemistryResearchCenterforEco-EnvironmentalSciencesChineseAcademyofSciencesBeijing100085ChinaAbstractThepollutantremovalefficiencyandmembranefoulingofthecombinedprocessofpreo-zonationandmembranebioreactorO3/MBRfortreatingpollutedsurfacewaterwereinvestigatedincomparisonwithsingleMBR．TheexperimentsofthecombinedprocessandthesingleMBRwereconduc-tedfor55days．Thedoseofozonewascontrolledatabout1．5mg/Landthehydraulicretentiontimeofozonecontactcolumnwas15min．Theresultsshowthatthepreozonationcanimprovetheremovaleffi-cienciesoforganicmattersandreducemembranefoulingeffectively．Three-dimensionalexcitation-emis-sionmatrixfluorescencespectroscopyindicatesthatthepreozonationisabletocontributetothedecreaseofbothsurfaceandinternalporefoulantsindifferentways．Moreoveratawavelengthof254nmDOMespeciallywithmolecularweightof500to2000uinmixedliquorofO3/MBRexhibitsmuchlowerab-sorbanceintensitythanthatofsingleMBRinsizeexclusionchromatographyanalysissuggestingthatthemembranefoulingcausedbythiskindofDOMisalleviatedbypreozonation．Thescanningelectronmi-·73·27720114CHINAWATER＆WASTEWATERVol．27No．7Apr．2011croscopyobservationsshowthatthepreozonationcanmitigatetheblockageofmembraneporeswhichbenefitstoirreversiblefoulingcontrol．Keywordsmembranebioreactormembranefoulingpreozonationsurfacewater1。MBR。MBR2MBR。MBR3～5MBR。。6。MBRO3/MBR。O3/MBR。O3/MBRMBRMBR、。11.1O3/MBR1MBRO3/MBR。。。MBR。MBRPVC0．01μm、0．851．45mm0．1m2。TMP。MBR。1O3/MBRFig．1SchematicdiagramofO3/MBR1.2412h∶=1∶301mg/L。15．5～18．3℃pH7．1～7．42．31±1．00NTUCODMn4．25±0．27mg/LDOC6．02±0．78mg/LUV2540．077±0．003cm－1。1.3MBR10L/m2·hHRT1．0h。30min1min。20∶140d。MBR3MBR。MBRMBR。1．5mg/L1520min。。55d。1.4MBR30minDOM0．45μm。20℃·83·277．watergasheat．com0．01mol/LNaOH24h0．45μm。1.5、DOC、CODMn、UV254。EEMFP－6500150W220～550nm220～450nm5nm2000nm/min3nm5nm。EEMOrigin7．0。254nmpH6．8NaCl、KH2PO4、Na2HPO40．1、0．002、0．002mol/L0．4mL/minPEG50μL。SEM。22.1MBRO3/MBRO3/MBRMBR97%1。1O3/MBRMBRTab．1PollutantsremovalefficienciesofO3/MBRandMBRsystemsO3/MBRMBR/NTU2．09±0．600．07±0．010．07±0．01CODMn/mg·L－13．15±0．221．60±0．202．30±0．28DOC/mg·L－15．50±0．573．54±0．574．34±0．60UV254/cm－10．046±0．0020．036±0．0020．059±0．002O3/MBRMBRCODMn62．4±3．3%45．9±3．7%CODMn16．5%。O3/MBRDOC41．2%MBR28．0%13．2%。O3/MBRUV25453．2%MBR29．8%。O3/MBR、。2.2TMPTMP。TMP2。TMP5kPa8dTMP。16TMPMBRTMPO3/MBR1．5kPa55MBRTMP36kPaO3/MBR23．5kPaMBR12．5kPa。TMP。2Fig．2ComparisonofTMPdevelopmentsinO3/MBRandMBRsystems2.3。3A、CT1T2。·93·．watergasheat．com/MBR2773O3/MBRMBRFig．3EEMfluorescencespectraofsurfaceandporefoulantsextractedfromO3/MBRandMBRO3/MBRMBR3aC3bT1A。。AO3/MBRMBR。TMP。。2.4O3/MBRMBR、4。4O3/MBRMBR、Fig．4MWdistributionofDOMindifferentsamplesofO3/MBRandMBR4254nmMBRDOMO3/MBRDOM。、DOM。0．01μm100ku。MBRDOMMBR·04·277．watergasheat．com、。O3/MBRDOMMBR500～2000u。2.5。SEMMBRScion-imagen=101280×9605。5Fig．5AreasumandcountsofporesderivedfromSEMimagesofmembranesurfaceSEM、。O3/MBR60%MBR80%。MBRO3/MBR。。O3/MBR。3①O3/MBRMBRO3/MBRCODMn、DOCUV254MBRO3/MBR、。②500～2000u。1．/J．201026750－53．2．J．200824814－18．3．J．2010261113－20．4TianJYLiangHLiXetal．Membranecoagulationbio-reactorMCBRfordrinkingwatertreatmentJ．WaterRes200842143910－3920．5SagboOSunYXHaoALetal．EffectofPACadditiononMBRprocessfordrinkingwatertreatmentJ．SepPurifTechnol2008583320－327．6LiLSZhuWPZhangPYetal．AC/O3-BACproces-sesforremovingrefractoryandhazardouspollutantsinrawwaterJ．JHazardMater20061351/3129－133．1983－。[e-mail]2010－11－22·14·．watergasheat．com/MBR277