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:2005-01-11.:863(2002AA601230).:(1975-),,,:.1,2,3(1.,511400;2.,300192;3.,518057):.,,015%NaOH(WFR),.015%,WFR,015%,WFR.WFR,60min.,.SEM,.,,,.:;;;:X703:A:1672-0946(2005)04-0444-05StudyonchemicalcleaningofmembraneduringsoyproteinwastewaterUFCHIJun1,CHENYing2,LVSi2hao3(1.GuangzhouConstructionScience&TechnologicalCommittee,Guangzhou150090,China;2.InstituteofSeawaterDesalinationandMultipurposeUtilization,SOA,Tianjin300192,China;3.ResearchInstituteofTsinghuaUniversity,Shenzhen518057,China)Abstract:ApilotstudywasconductedforinvestigatingthechemicalcleaningtechnologyintheprocessofsoyproteinwastewaterUF.Incomparison,alkalineagentsweremoreeffectiveforre2movingthefoulantsonthemembane.NaOHsolutionwithaconcentrationof0.5%showedtobeaperfectcleaningagentinthatthewater-permeate-recovery(WFR)is89.2%.Increasingtheconcentrationofchemicalagentsto0.5%wouldinducetheincreaseofWFRs;thereafter,thechangecoursesofWFRweredifferent.TheincreaseofcleaningdurationwouldalsoinducetheincreaseofWFRs;whereas,theeffectofcleaningdurationontheWFRsofchemicalagentswasunnoticeable.FromtheEDSanalysisresultsitcouldbeseenthatnotallofthefoulantsonthemembranehadbeenremovedbychemicalcleaning.SEManalysisrevealedthatlongtermsofchemicalcleaningcouldalterthestructureaswellasthefilterabilityofmembrane.Therefore,providedchemicalagentswereselectedreasonably,severealterationofmembranecouldbeavoid2ed.Keywords:ultrafiltration;chemicalcleaning;soyproteinwastewater;membranefouling,,,,21420058()JournalofHarbinUniversityofCommerce(NaturalSciencesEdition)Vol.21No.4Aug.2005[1].,.,[2].,,,.,,,SEMEDS.11111.90cm10cm,(PS),,(MWCO)10ku,8m2,.1;2;3;4;51112(HCl)(NaOH)(SDS)(NaClO),.113,,1(),,.,20(),(Jw0),,.10L/(m2h),,(Jwf)..,,,,,,,(Jwc).(WFR).WFR(%)=Jwc-JwfJw0-Jwf100%.(1),SEMEDS.1w/%w/%COD/(mgL-1)BOD/(mgL-1)SS/(mgL-1)pH01330160130001080001011000104150114;COD;BOD;SS;;pH.(SEMJXA-840,JEOL),(EDSISIS-300,Oxford).2211,1h30min,2.2/%pHJw0/(Lm-2h-1)Jwf/(Lm-2h-1)Jwc/(Lm-2h-1)WFR/%HCl015-5511131139116119NaOH015-5419131350148912SDS01511125514121548138314NaClO01510185417131044167518015101355121217511190145444,:2,WFR9014%,,[35].,.NaClO,,MBR.,015%NaClOWFR7518%,HCl,NaOH.SDS[3],,015%SDSWFR8314%,.,NaOHHCl,WFR8912%,.Huihuazhu[6],(BSA),015%NaOH1h,95%,,,.Maartens[7,8],,,.2122.015%,;015%,WFR.WFR,012%,WFR80%,015%,WFR90%,,WFR.HClSDS,,WFR65%85%.[9],1%3%,HCl.2NaOHNaOCl,015%,.110%NAOHWFR100%,115%,WFR,133%.110%NaClOWFR015%,115%,WFR93%,210%,WFR100%.,NaOH.HuihuaZhu[6]015%NaOH,,.[10]NaOH.[5]3%NaClO,.,015%.213,,3.,.,40min,,;60min,WFR.20min,WFR,60min,.HCl,NaOH,100min,.[11],1020min,.3214EDS,4.CN644()21,NaCa.44,,,015%NaOH,,.,NaOHCa2+,,Ca2+.015%NaOHWFR8912%,Ca2+.Minh[12]Ca2+Na+.Huihua[6]FTIRNaOH,.Ponti[13],,,.,,,.215SEM.,,,5.5,,,.SEM,,,,..216[14].,,6.5SEM(5000,a;b;c;d)66,,,0103%0105%,,,0105%,,015%NaOH,,,.,.,,,,,.3,,NaOH,,.,7444,:NaOH110%,,210%NaClO.,.,20min,WFR,60min,WFR.,,.SEM,,,,.[1]MUSALEDA,KULKAMISS.Foulingreductioninpoly(aeryloni2trile-co-acrylamide)ultrafiltrationmembranes[J].J.MembraneScience,1996,111:49-56.[2]KIMKJ,SUNP,CHENV,etal.Thecleaningofultrafiltrationmembranesfouledbyproteins[J].JournalofMembraneScience,1993,80:241-249.[3].[J].,1999,2:28-30.[4],.[J].,2001,26(5):22-25.[5],,,.[J].,2000,26(6):6-10,26.[6]ZHUHui-hua,MARIANNEN.Cleaningresultscharacterizedbyflux,streamingpotentialandFTIRmeasurements[J].ColloidsandsurfacesA:PhysicochemicalandEngineeringAspects,1998,138:309-321.[7]MAARTENSA,SWARTP,JACOBSEP.Removalofnaturalor2ganicmatterbyultrafiltration:characterization,foulingandcleaning[J].WaterScienceandTechnology,1999,40(9):113-120.[8]MAARTENSA,SWARTP,JACOBSEP.Humicmembranefoulantsinnaturalbrownwater:characterizationandremoval[J].Desalination,1998,115:215-227.[9],.[J].,1997,17(4):16-18.[10],.[J].,1998,17(1):35-38.[11],,,.[J].,1998,6(24):24-26.[12]MINHHT,DIANNEEW.Therelationshipbetweenmembranecleaningefficiencyandwaterquality[J].JournalofMembraneSci2ence,1998,145:99-110.[13]PONTIEM,DURAND-BOURLIERL,LEMORDANTD,etal.ControlfoulingandcleaningproceduresofUFmembranesbyastreamingpotentialmethod[J].SeparationandPurificationTechnol2ogy,1998,14:1-11.[14],,.[J].:,2004,20(5):556-559.(443)[9]UEDAT,HATAK,KIKUOKAY.Treatmentofdomesticsewagefromruralsettlementsbyamembranebioreactor[J].WatSciTech,1996,34:189-196.[10]KAICHANGY,XIANGHUAW,QINGJIEB,etal.Criticalfluxenhancementswithairsparginginaxialhollowfiberscross-flowmi2crofiltrationofbiologicallytreatedwastewater[J].JournalofMem2braneScience,2003,224:69-79.[11]CHANGIS,BAGSO,LEECHH.Effectsofmembranefoulingonsoluterejectionduringmembranefiltrationofactivatedsludge[J].ProcessBiochemistry,2001,36:855-860.844()21