MBRMCR处理微污染水的膜污染比较

MBRMCR郝爱玲,张光辉,张颖,顾平(天津大学环境科学与工程学院,天津300072):膜污染是影响膜反应器稳定运行的重要原因之一,为此考察了膜生物反应器(MBR)和膜混凝反应器(MCR)处理微污染地表水时的运行状况,并对膜比通量的变化进行了比较,发现MBR的膜污染情况比MCR的严重MCR和MBR的膜组件经物理化学清洗后膜比通量分别恢复至新膜比通量的99.7%和76.9%,物理清洗对此的贡献较大经分析发现,MCR中无机污染占优势,主要污染元素是Fe;MBR中微生物和有机物是膜污染的主要组成,而无机污染物则主要是铁盐和磷酸盐:微污染原水;MBR;MCR;膜比通量;膜污染:TU991.2:C:1000-4602(2004)07-0049-05ComparisonofMembraneFoulingBetweenMembraneBio-reactor(MBR)andMembraneCoagulationReactor(MCR)forMicro-pollutedRawWaterTreatmentHAOAiling,ZHANGGuanghui,ZHANGYing,GUPing(SchoolofEnvironmentalScienceandEngineering,TianjinUniversity,Tianjin300072,China)Abstract:OperationofMBRandMCRformicro-pollutedsurfacewatertreatmentwasinvestigated,anditwasfoundbycomparingthevariationofmembranespecificflux(SF)thatmembranefoulingofMBRismoreseriousthanthatofMCR.Afterphysicalandchemicalcleaningofmembrane,themembranespecificfluxforMCRandMBRisrecoveredrespectivelyto99.7%and76.9%ofpurewaterspecificflux,andphysicalcleaningmakesmorecontributiontoit.AnalysisshowsthatelementironisthedominantfoulantinMCR.WhileinMBRthecompositionoffoulantscomesmainlyfrommicroorganismandorganicmatters,andironsaltsandphosphatearethemaininorganicfoulants.Keywords:micro-pollutedrawwater;MBR;MCR;membranespecificflux;membraneflouling:(013105211):(membranebioreactor,MBR)(membranecoagulationreactor,MCR)MBR,MCR,MCR,;MBR,,,MBRMCR,492004Vol.20CHINAWATER&WASTEWATERNo.7,MCR70dMBR130d,,MCRMBR1试验装置与方法11MCRMBR1(PAC),1MBRMCRFig.1FlowchartofMBRandMCRMBRMCR8min2min(PVDF),0.22m11Tab.1Parametersofexperimentalsetup(L/h)HRT(min)(m2)(d)MBR1501202011530MCR500521513012MBR130d(24h/d),400m3,(GB38382002)(CODMn=6~15mg/L)(CODMn15mg/L);MCR70d(5~7h/d),172.2m3,,,(GB38382002)(CODMn4mg/L);,(CODMn=10~15mg/L)213CaMgFe:;UV254UV410:TU-1800/;PO3-4:2Tab.2Qualityofrawwateranddosage()(NTU)CODMn(mg/L)pH(mg/L)FeCl3(mg/L)PAC(mg/L)MBR9.5~23.03.5~51.69.01~27.267.22~8.632.48~17.7910MCR21.0~29.01.9~3.11.80~3.6810205.2~17.512.5~36.612.82~26.788.00~9.046.76~9.7030401.9~5.712.6~18.212.71~16.548.02~8.337.05~8.6912080:pH2结果与分析21(SF)MCRMBR2MCR,,,;MBRMBR24h/d,MCR5~7h/d,MBRMCR,SF,2,2SFSF,KSF,3502004Vol.20No.72Fig.2MembraneSpecificfluxvsoperationtime3SFFig.3Specificfluxvsaccumulativepermeatequantityperunitmembranesurfacearea3aMCR(MBR),6m3;3bMBR,6m3;3cMBR()23aMCRSFMCR,3KAB=0.264KAB=0.245,()MBRMCR,,MBRMCRKABKAB8%,MBR3c,SF,K(K1=0.208,K2=0.081)MBR,,SF,,MBR:,,,,,;,,PAC,,,,[1],,SF70d,MCR74.6%,MBR130d27.8%MBRMBRMCR,[1],MBR,MCRFe(OH)3,[2],MBRMCR,MCR512004Vol.20No.7,,MBR,22MCRMBR70130d,:MCR,,PAC,PAC,PAC,,[3]MBR,,,,,23MBRMCR,MCR:0.02%12h0.5%NaClO12h;MBR:0.3%12h0.4%NaClO12h,MCR,Fe(OH)3,,,MBR,,,,,(SF/SF0)(),33,MCRMBR15.4%25.0%,65.3%50.9%,MCRMBR,MCRMCR,HClNaClO,MBR,MCRMBR3Tab.3Recoveryofmembranespecificfluxafterwashing%MCRSF/SF074.691.097.899.765.327.17.6MBRSF/SF027.852.856.776.950.97.941.2MCR99.7%,MBR76.9%,MBR,[1],,,24:(Fe2+),,[1],,,44Tab.4compositionofacideluentmg/(m2m3)CaMgFeMCR0.0650.0520.427MBR0.1840.0350.2774,MBRMCR,Fe,[4]MBRMCR3,,MBR,[2],KwangHoChoo[5]MBRMgNH4PO46H2O,,,MBR522004Vol.20No.7PO3-4(5),5MBRTab.5CompositionanalysisofacideluentfrommembranemoduleHClNaClOUV254(cm-1)0.0620.1172.009UV410(cm-1)0.0060.0040.022PO3-4[mg/(m2m3)]0.0000.0820.0195,NaClOUV254UV410UV254UV410[6],NaClO,,[4]NaClO(ExtractableOrganicHalogens,EOX),[7],MCR,MBR3结论MBRMCR,70dMCR74.6%,MBR130d27.8%,MCR,MCRMBR99.7%76.9%,MBRMCR,;,NaClOMCR,MBRMCR,Fe;MBR,:[1],.[M].:,2002.[2]StephensonT.MembraneBioreactorsforWastewaterTreatment[M].London:IWAPublishing,2000.[3],,.[J].,2001,17(2):1-4.[4],,,.[J].,2002,22(3):258-262.[5]KwangHoChoo,ChungHakLee.Membranefoulingmechanismsinthemembrane-coupledanaerobicbioreactor[J].WatRes,1996,30(8):1771-1780.[6],.[M].:,1999.[7],,.[J].,2002,18(4):90-92.E-mail:[e-mail]:2004-01-05山东省枣庄市供水工程该工程位于枣庄市薛城区潘庄,建设内容包括微山湖取水输水净水厂配水四部分,处理规模:10104m3/d,取水泵站占地面积:0.8hm2,净水厂占地面积:9.9hm2,输水干管全长:5.8km,总投资额:1703万美元该项目投产后,全部投资财务内部收益率为10.02%,财务净现值为2092万元人民币,投资利税率为17%,投资利润率为11.43%,投资回收期为16.56年(含建设期2年)建设单位:山东省枣庄市薛城区计划局()532004Vol.20No.7