超滤技术在反渗透海水淡化预处理中的应用刘继全

126200612()JOURNALOFSHANGHAIUNIVERSITY(NATURALSCIENCE)Vol.12No.6Dec.2006:2006-02-13　:(863)(2002AA302302):(1966～),,,.E-mail:[e-mail]　　:1007-2861(2006)06-0610-05刘继全,　方建慧,　邓　英,　施利毅(,200444):,,.50ku10ku,、、、COD(Cr),(SDI).:;;;COD(Cr);SDI:TQ028.8　　　:AApplicationofUltrafiltrationinPretreatmentofSeawaterDesalinationLIUJi-quan,　FANGJian-hui,　DENGYing,　SHILi-yi(SchoolofSciences,ShanghaiUniversity,Shanghai200444,China)Abstract:Ultrafiltrationtechniquesareintroducedinthispaper.Advantagesofultrafiltrationappliedinthepretreatmentofseawaterareanalyzed.Duringpilottesting,influenceofdifferentMWCOultrafiltrationmembrane,operationpressureandfiltrationtimeontheremovalofturbidity,COD(Cr)andfiltrationfluxisinvestigatedusing50kuand10kupolysulfonehollowfiberUFmembrane.SDIofUFfiltrationwasmeasuredagainsttimetoevaluateperformanceofpretreatmentsystems.Keywords:ultrafiltration;pretreatmentofseawater;turbidity;COD(Cr);SDI　　(RO),.,.、,pH,[1-3],.、、、pH、、.,[4],[5].(UF)、,0.002～0.200μm,,103～106[6-7].,,,、[8].、,,,[9]..1　1.1　,,、、,、,.,,、、、.、、、[1].,,,,,[3]..,1500～4000mgL.,,,,.,,.1.1　Fig.1　Flowchartofpretreatmentsystem　　BW,(MWCO)50ku10ku.5,、,1.5th.50μm,2.2　Fig.2　FlowchartofUFsystem　　4th,;、,10～50NTU.,0.1NTU,,COD(Cr).,.1.2　,1.1.3　WTWCond330iTDS()(TDS);HACH-COD()COD(Cr);HACH();EZSDITMSDI()SDI;PHS-3BpH()pH;;.2　2.1　MWCO50ku10ku.、.1　Tab.1　FeedseawaterqualitypH(ms·cm-1)TDS(g·L-1)(g·L-1)COD(Cr)(g·L-1)(g·L-1)℃7.52～7.8328～3213.550～14.3303.540～3.7200.038～0.1801.500～4.00018～26611　6,:　　　　.2.1.1　10～50NTU,0.1MPa.3.,,10ku50ku,0.1NTU,.3　50ku10kuFig.3　Filtrateturbidityagainsttimefor50kumembraneand10kumembrane2.1.2　COD(Cr)0.1MPa,COD(Cr),4.4　50ku10kuCOD(Cr)Fig.4　COD(Cr)removalof50kumembraneand10kumembrane　　,,10ku50ku,10ku,(4),COD(Cr),50kuCOD(Cr)10ku,,、、[10],.,,.,4,COD(Cr)COD(Cr),.COD(Cr),.COD(Cr),.2.1.3　5.,,50ku10ku,,,.0.1MPa,50ku10ku,0.2MPa,10ku50ku,(a):0.1MPa(b):0.2MPa5　50ku10kuFig.5　Permeatefluxagainsttimefor50kumembraneand10kumembrane612　　　　()12　.6,10ku.10ku,,.2.2　50ku10ku,,50ku,.2.2.1　.,();,.,(6).2.2.2　COD(Cr)COD(Cr)6.COD(Cr)40mgL,COD(Cr)10～16mgL,COD(Cr)70%,COD.6　COD(Cr)Fig.6　FiltrateturbidityandCOD(Cr)againsttime2.2.3　(7).,,..0.1MPa,,.2.3　0.1MPa,50ku.2.3.1　7　50ku10kuFig.7　Permeatefluxagainstpressurefor50kumembraneand10kumembrane　　8.,,,.,,.,,.,,,,,,.,,.8　COD(Cr)Fig.8　InfluenceoffiltrationtimeonfiltrateturbidityandCOD(Cr)2.3.2　COD(Cr)COD(Cr)8.6hCOD(Cr),10～35mgL,.,COD(Cr).613　6,:　　　　2.3.3　9.,,.,,,,.,,,,,.,,.9　Fig.9　Influenceoffiltrationtimeonfiltrateflux2.4　(SDI)SDI,.SDI5,.100.1MPa,50ku30d10　SDIFig.10　SDIofUFfiltrationovertimeSDI.　　SDI1.5～2.0,SDI,.,,.3　　,,40%.,、,.,、、、,.,,.:[1]　,,,.[J].,2003,19(8):30-32.[2]　,,,.500t/[J].,2000,20(2):49-54.[3]　,.[J].,2003,23(4):45-60.[4]　CHUAKT,HAWLADERMNA,MALEKBA.Pretreatmentofseawater:ResultsofpilottrialsinSingapore[J].Desalination,2003,159:225-243.[5]　TENGCK,HAWLADERMNA,MALEKA.Anexperimentwithdifferentpretreatmentmethods[J].Desalination,2003,156:5l-58.[6]　.[M].:,2004:234-235.[7]　.[M].:,2000:30-33.[8]　.、[J].,1998,18(5):58-60.[9]　,,.[J].,1999,25(1):28-31.[10]　LINDAUJ.Adsorptivefoulingofmodifiedandunmodifiedcommercialpolymericultrafiltrationmembranes[J].JournalofMembraneScience,1999,160:65-67.(编辑:刘志强)614　　　　()12