搜索
45环境工程学报Vol.4,No.520105ChineseJournalofEnvironmentalEngineeringMay2010PESMBR薛罡邱恒刘亚男刘振鸿(,201620)(PES)(CA)(TiO2),LSPES2402MPa,PES300L/(m2h),CAPES660L/(m2h),TiO2PES840L/(m2h),;,MBR,PES,;TiO2CA,CA;,PES,TiO2CA,,TiO2CATiO2TQ0288A16739108(2010)05108907MembraneresistanceanalysisandresearchonmembranefoulingmechanismofmodifiedPESmembraneinmembranebioreactorXueGangQiuHengLiuYananLiuZhenhai(CollegeofEnvironmentalScience&Engineering,DonghuaUniversity,Shanghai201620,China)AbstractThemodifiedpolyethersulfone(PES)membranewaspreparedbyLSphaseinversionmethodwithcelluloseacetate(CA)andTiO2asmembranematerials.ThewaterfluxofPESmembranewasnearly300L/(m2h),nearly660L/(m2h)forPESmembranemodifiedbyCAandnearly840L/(m2h)forPESmembranemodifiedbyTiO2,undertheoperationalconditionsof24and02MPa.Themembraneresistancedeterminationinamembranebioreactorwasfoundthatmembranefoulingwasmainlyduetoconcentrationpolarizationlayerandgellayer.Themembranefoulingmechanismstudiedbyactivatedsludgewasjudgedthatsludgefiltrationprocessbasicallyaccordedwiththedepositionfiltrationlaw.WhenmembraneswereusedintheMBR,thestablefluxofmodifiedPESmembranewashigherthanthatoftheunmodifiedandthetotalresistancewaslower;thestablefluxofmembranemodifiedbyTiO2washigherthanthatofmembranemodifiedbyCAandthetotalresistancewaslower.Scanningelectronmicroscopyanalysisindicatedthatthedepositionlayerthicknessofmodifiedmembranewasthinnerthanthatoftheunmodified,thedepositionlayerthicknessofmembranemodifiedbyTiO2wasthinnerthanthatofmembranemodifiedbyCA,whichshowedtheantipollutionperformanceofmodifiedmembranewasimproved,andtheantipollutionperformanceofmembranemodifiedbyTiO2wasevenmoreexcellen.tKeywordsPESmembrane;membranemodifiedbyCA;membranemodifiedbyTiO2;membranebioreactor;membranefouling:(NECT070175);(10ZR1401100);(08JC1400500);(200802551001):2009-05-10;:2009-06-04:(1971~),,,,Emai:lxuegang@dhu.edu.cn,,,,4,:[1,2][3][4,5],[6],(PES),,,[7],PES,(MBR)(CA),;TiO2[8],,,,,PES[9~11],CATiO2PESPESPES/CAPES/TiO2,,111(PES,RADELA100),,;(PVPK30),4400054000,,;N,N(DMAc),,;(CA),,;(P25),;(BSA),67000,,12,;/PH140(A),;TU1900,;THZ031,;JSM5600L,;AR1140,();JY82,;1,36!10-3m21Fig1Experimentalmembranefiltrationequipment1318%(PES)12%(PVP)N,N(DMAc),,()60,,(70)24h,LSPES,60s,2%DMAc,1800s,,24h,2%(CA)5.3%(TiO2)CAPESTiO2PES141.4.1膜结构的表征,,JSM5600LV1.4.2膜通量的测定,24,02MPa,20min,02MPa,,J(L/m2h)3,J=/(!)1.4.3膜孔隙率和孔径的测定[12];[13]1.4.4膜接触角的测定JY82,25L10905:PESMBR,15,,,Rt=Rm+Rp+Rf=Rm+Rp+Ref+Rif=Rm+Rc+Rif(1)(1)Rt;Rm;Rp;Rf(=Ref+Rif);Ref;Rif;Rc(=Rp+Ref)Darcy:J=PRt=P(Rm+Rp+Ref+Rif)(2)24,w=9186!10-4Pas,=1301!10-3PasJ0,J1,J2,J3J1=PRt=P(Rm+Rp+Ref+Rif)(3)J2=Pw(Rm+Ref+Rif)(4)J3=Pw(Rm+Rif)(5):Rm=PwJ0(6)Rt=PJ1=Rm+Rp+Ref+Rif(7)Rif=PwJ3-PwJ0(8)Rp=PJ1-PwJ2(9)Ref=PwJ2-PwJ3(10),16[14]:Kst2=tV-1Qo(11)t~tV,(6):KcV2=tV-1Qo(12),Ksc,t(min),V(mL)V~tV,(7),,V,t~tVV~tV22124,020MPa,;JJC1,113Table1Propertiescomparisonofthreekindsofmembranes(%)(L/m2h)(m)(∀)PES68.2303.850.07272CA72.3654.460.10456.5TiO276.6840.390.185501,PES,TiO2CA,PES,TiO2CACAPES,,;TiO2,,[15],,,TiO2CAPES,TiO2CA222.2.1膜通量及阻力的变化24,020MPa,10914MBR,232,MBR,,,PES,TiO2CA3,,TiO2CA,PES,TiO2CA2.2.2MBR中膜阻力分析24,020MPa,3J0,MBR6h28hJ1,,,J2,,,J36h,PESCATiO21639!1012m-1745!1012m-1604!1012m-1,,23;28h,PESCATiO22158!1012m-1909!1012m-1685!1012m-1,4523(6h)Table2Fluxofthreekindsofmembranes(6h)(L/m2h)J0J1J2J3PES305.4833.77115.40289.55CA662.4574.28249.22617.65TiO2832.6891.63312.77778.3533(6h)Table3Filtrationresistanceofthreekindsofmembranesandtheirproportions(6h)Rm1012m-1%Rp1012m-1%Ref1012m-1%Rp+Ref1012m-1%Rif1012m-1%PES2.56615.669.59868.562.44514.9213.68283.480.1410.86CA1.18315.874.30567.791.13215.196.18282.980.0861.15TiO20.94115.573.53468.510.89614.835.03483.340.0661.093,3Rp+Ref,83%,Rif,RmRpRefRifPES,TiO2CA,PES,TiO2CA43(28h)Table4Fluxofthreekindsofmembranes(28h)(L/m2h)J0J1J2J3PES304.3525.64100.79268.59CA657.7660.85234.56593.30TiO2842.5776.13295.26756.9510925:PESMBR53(28h)Table5Filtrationresistanceofthreekindsofmembranesandtheirproportions(28h)Rm1012m-1%Rp1012m-1%Ref1012m-1%Rp+Ref1012m-1%Rif1012m-1%PES2.57511.9313.80363.964.85922.5218.66286.480.3431.59CA1.19213.115.74863.232.02122.437.76985.470.1291.42TiO20.9313.584.19561.241.6223.655.81584.890.1051.53[16]MBR,Rm316%Rp+Ref652%Rif32%;[17]PANMBR,40%,Rm2839%Rp+Ref7161%Rif1176%,5,Rp+Ref,Rif,,,,,PES,[18]MBR,24h,Rp+Ref3745!1012m-1,MBR28hPES,,PESMBR4,MBR,PES,TiO2CA,,TiO25,,24h,Rp+Ref6h,,,,Rif,35,,RpRefRif,PESRp1Rif1,CARp2Rif2TiO2,,TiO22324,020MPa,3MBR,,454,,3tt/V,,20min,3tt/V,,3,109345,3Vt/V,,3,:,,24MBR28h,,6,abcPESCATiO2,defPESCATiO2,def6Fig6Membranefoulingconditioncomparisonbeforeandaftermodificationabc,,,,,,,abc,PES,PES,,def,3,3,PES4m,CA2m,TiO21mPES,TiO2CAPES,PES,PES,CA,PES,PES,TiO2CA3(1)24,02MPa,PES300L/(m2h),CAPES660L/(m2h),TiO2PES840L/(m2h)(2),,MBR,,;TiO2CA,TiO2;,TiO2CA(3)PESCATiO2,(4),PES,TiO2CA,,TiO2CA[1]PierreL.C.C.,TonyA.G.F.Foulinginmembranebioreactorsusedinwastewatertreatment.MembraneScience,2006,284(3~4):17~53[2]BrookesA.,JeffersonB.,GuglielmiG.,etal.Sustainablefluxfoulinginamembranebioreactor:ImpactoffluxandMLSS.SeparationScienceandTechnology,2006,41(2):1279~129