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＊＊黄肖容 黄仲涛(,510641) ,.0.05μm、0.1μm,,.0.1μm、0.2μm,,0.45m3/(m2·h).0.2μm、0.3μm、,95%,1.59m3/(m2·h).,,、,100%90%.()、,0.1—10μm,、. ;;;.1 .60.,,,,,,.,,、、、、,,,,80,.,:(1),;(2),();(3);(4),,,;(5),,、、;(6).Al2O3、SiO2、ZrO2,,,、,,[1].、、.0.10—10μm,、.,;(),;、[2].()、,、[3,4].、、、、.,,,;、18519989 ACTASCIENTIAECIRCUMSTANTIAEVol.18,No.5Sept.,1998DOI:10.13671/j.hjkxxb.1998.05.004,,.、,,(1mm)、..,[5],,.2 2.1 ,1—2mm、0.1μm、0.2μm1—3μm[6].2.2 1,,,,.,,,、1 Fig.1 Schematicdiagramofthemicrofiltrationofasymmetricaluminatubularmembrane.3 3.1 2 SEM(a),(b)()Fig.2 SEMofthealumagradienttubularmembrane(a)cross-section(b)top(controlled)layr2(a,b)0.2μm(YM-3)SEM,,,,、,.[7].,,,,.,:r=2σcosθ/p,p,Δp,r,σ,θ4675:3 YM-3Fig.3 PoresizedistributionofYM-3tubularmembrane.,σθ,p,.,.,,P-Q,,.3YM-3.3.2 ,1[8],0.6—1.5μm,2—6μm,0.3μm,0.1μm.1 Table1 Commonbacteriuminthewater ,μm0.5—2.50.5—1.51.0—2.03—152—10＊,μm2.0—6.04.0—10.04.0—8.01—35—205—30,μm0.6—1.51.0—1.50.4—0.60.3—0.50.1—0.21—5 ＊0.5μm 2.3.2 Table2 Permeabilityoftheasymmetricaluminamicrofiltrationtubularmembrane,μm,μm,%,m3/(m2·h),MPaYM-10.050.160.080.35YM-20.10.2150.450.25YM-30.20.3181.590.17YM-41.53.0185.500.10 ＊3 Table3 Bacterialfilterablenessoftheasymmetricaluminatubularmembrane 100/mLYM-10/mLYM-20/mL＊YM-33/mLYM-414/mL ＊,468 18 4、、,0.05μm,,.YM-4,.YM-3,,95%.,YM-2.,,、,0.1—0.2μm,0.2MPa,.,,4 Fig.4 Influenceofusetimeonthefiltrationfluxofthealuminatubularmembrane,,,,4YM-2、YM-3.0.2μm、0.3μmYM-35m3/(m2·h),,,1.59m3/(m2·h).YM-22.8m3/(m2·h),,0.45m3/(m2·h).,,,,,,.,,,(),.,,,,,.,100%,90%.4 ,,,.0.05μm、0.1μm,,.0.1μm、0.2μm,,0.45m3/(m2·h).0.2μm、0.3μm、,95%,1.59m3/(m2·h).,、100%90%,、,0.1—10μm,、.、,.4695:1 ..:,1994:2012 KeizerK,VerweijH.Progressininorganicmembranes.Chemtech,1996,26(1):373 SheppardLaurelM.In:IshizakiKozo(eds).Porousceramics:processingandapplications.CeramicTransactions,PorousMa-terials.Westerville,Ohio:TheAmericanCeramicSociety,1992:9—204 BhaveRR,GuibaudJ,FuenteBTabodaDeLaetal.In:BhaveRameshR(ed).Inorganicmembranesinfoodandbiotechnology.Inorganicmembranes.NewYork:VanNorstrandReinhold,1991:2085 ,.,:CN1132680A,19966 ,..,1996,16(2):317 ..:,1982:2458 ..:,1988:9STUDYONTHEMICROFILTRATIONOFTHEASYMMETRICALUMINATUBULARMEMBRANEHuangXiaorong,HuangZhongtao(ChemicalEngineeringDepartment,SouthChinaUniversityofTechnology,Guangzhou510641)ABSTRACT Thealuminatubularmembranepreparedbythemeltablemouldingcentrifugaltechniquehasgradientporesizedistributionincrosssectionwiththenarrowporesizedistributionoftoplayers(con-trolledlayers).Withthemostporesizeof0.05μm,thelargestporesizeof0.1μmaluminatubularmem-brane,verybrightandentiresterilewaterisobtained.Usingthetubularmembraneofthemostporesizeof0.1μmandthelargestporesizeof0.2μm,thebacteriuminthefeedcanberemovedwithstablemicro-filtrationfluxof0.45m3/(m2·h).Near-sterilizingfiltrationcanbeachievedusingmembranesofthemostporesizeof0.2μmandthelargestporesizeof0.3μm,escherichiacoli,moldandyeastinwatercanberemovedentirely,morethan95%oftotalbacteriacontainedinthewatercanberemoved.Thecrossflowmicrofiltrationfluxstartsatahighlevelanddropsrapidly,approachingasteady-statevalueof1.59m3/(m2·h)forwater.Thiskindofasymmetrictubularmembraneminimizesdeep-porefoulingandpluggingefficiently,easycleaning,with100%recoveryoftrappingefficiencyandmorethan90%recoveryoffluxefficiency.Thiskindofaluminatubularmembranecanbeusedinthefoodandbeverageindustriesandinwaterfiltrationtoproducedaclearsterileliquidandwaterbyremovingthecontaminantssuchasmi-croparticlesof0.1—10μmisdiameterorbacterium.Keywords Inorganicmembrane,Asymmetrictubularmembrane,aluminamembrane,microfiltration1997-01-081997-06-19470 18