臭氧预氧化对城市二级处理水中残留省略量分布的影响及超滤膜阻力变化分析王磊

:1007-8924(2006)02-0027-05臭氧预氧化对城市二级处理水中残留有机物分子量分布的影响及超滤膜阻力变化分析王　磊,王旭东,刘　莹,段文松(,710055)　:利用对城市二级处理水进行了臭氧预氧化,测定了水中残留有机物的分子量分布,并采用PVDF超滤膜对不同分子量分布的二级处理水进行了过滤.结果发现,水中有机物的分子量分布对膜的阻力构成影响很大,堵孔阻力和滤饼阻力对膜污染阻力起控制作用,有机物分子量分布与膜阻力之间有如下关系:1)2/15d/1/3(d为水中有机物分子直径,为膜孔直径)的有机物易在膜孔内表面产生吸附,而d/2/15时,有机物则易透过膜孔;2)1/3d/1的有机物主要形成膜表面和膜孔内的堵塞,1d/5/3的有机物主要形成膜表面的堵孔;3)d/1特别是d/5/3的有机物则是形成膜表面滤饼的主体.:膜阻力;膜污染;分子量分布;超滤膜;二级处理水:X703.1;TQ028.8　　:A　　、,.、,[1,2].[3],,.,,.1　试验部分1.1　,500mL..0.45μm、5、3、1、0.4PES()().SCM,3.32×10-3m2.,0.1MPa,..TOCTOC-5000A.1.2　:J=ΔpμR,J,L/(m2·h);Δp,Pa;μ,Pa·s;R,1/m.Rm、Ra、Rc、RgRcp.:(1),Rm;(2),24h,,Rm+Ra;(3),24h,,Rm+Ra+Rc:2004-07-23;:2005-03-17:(50308023):　(1971-),,,,,、.:[phone](H)13509182229,E-mail:[e-mail]26　2　　　　　Vol.26　No.220064MEMBRANESCIENCEANDTECHNOLOGYApr.2006DOI:10.16159/j.cnki.issn1007-8924.2006.02.007+Rg+Rcp;(4)Rm+Ra+Rc+Rg;(5)(4),,Rm+Ra+Rg;(6)Rm,Ra,Rc,Rg,Rcp.2　结果与讨论2.1　,、,1～5.1　Fig.1　Molecularsizedistributionofsecondaryeffluent2　1minFig.2　Molecularsizedistributionofsecondaryeffluentafter1minozonation14kDa54.1%,30k～50kDa18.8%,0.45μm8.5%,50kDa10k～30kDa6.1%9.5%.21,　　　3　5minFig.3　Molecularsizedistributionofsecondaryeffluentafter5minozonation4　10minFig.4　Molecularsizedistributionofsecondaryeffluentafter10minozonation5　20minFig.5　Molecularsizedistributionofsecondaryeffluentafter20minozonation4kDa,0.45μm,9.3%,　·28　　　·　　　　　26　130k～50kDa,10.3%,0.45μm～50kDa,17.6%,11.1.354kDa,76%,4kDa25.9%,21.2%,24.6%,1/5～1/4.,,,34kDa0.45μm,13.4%,40.45μm10k～30kDa,7.9%7.6%,510k～30kDa,12%.TOC,,,,、、.2.2　PVDF-300(,30kDa,),(25℃)6.6　Fig.6　Changeoffluxandozonecontacttime6,,10min,1min,2.34L/(m2·min);5min,;,,;10min,.,,,.,1min,,,1min,,,.2.3　PVDF-300,,Rf,7.7　PVDF-300Fig.7　DifferentresistancesofpreozonizationeffluentwithvariousozonecontacttimeinUFPVDF-300.,20minTOC50%,742,1min,TOC9.1,49%.,.,..2.3.1　(Ra)[4],.7,1min,,16%,:4kDa.,,　2　:·29　　　·　..1min,.1～5,210k～4kDa.:,10k～4kDa,4kDa,,;4kDa,,.2.3.2　(Rg),.,30k～10kDa,;50k～30kDa,,.,,,.,1min,,1min.2.3.3　(Rc)0.45μm～50kDa0.45μm.,,,.,,.1min,,.5～10min,,,,,,,.2.3.4　(Rcp),,.30kDa～0.45μm.,PVDF-300,d/2/15(d,);2/15d/1/3;1/3d/1;1d/5/3,d/1d/5/3.3　结论1),,,、、.2),.,,.,1min,.3)PVDF-300,:(1)2/15d/1/3,d/2/15,;(2)1/3d/1,1d/5/3;(3)d/1d/5/3.[1]　,.にとしたろとナノろにょるろ[A].49[C].1998.188-189.[2],.にょるナノろの[A].50[C].1999.256-257.[3]WangL,FukushiK,SatoA.Afundamentalstudyontheapplicationofnanofiltrationtowatertreatment[J].JJapanWaterWorksAssoc,2000,69(5):35-45.[4]　,　.[J].,1997(4):13-17.　·30　　　·　　　　　26　StudyontheeffectofozoneoxidationonmolecularsizedistributionofthesecondaryeffluentandmembraneresistanceWANGLei,WANGXudong,LIUYing,DUANWensong(SchoolofEnvironmental&MunicipalEngineering,Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China)Abstract:Inthispaper,ozonizationwasusedforthesecondaryeffluentandthemolecularsizedistributionofor-ganicmatterinwaterwasdetermined,andpolyvinylidenefluoride(PVDF)UFmembranewasadoptedtofil-tratethewaterwithdifferentmolecularsizedistributionoforganicmatter.Theresultsindicatedthatmolecularsizedistributionoforganicmatterhasagreatinfluenceonmembraneresistances.Theblockresistanceandcakelayerresistancewerethemajorfactorscausingmembraneresistance.Therelationbetweenmolecularsizedistri-butionoforganicmatterandmembraneresistanceisasfollows:(1)whend/2/15(d:themolecularsizeoftheorganicmatterinwater;:membraneporesize),theorganicmattercouldpermeatethroughthemembraneporeeasily,while2/15d/1/3,theorganicmatterwasinclinedtocauseadsorptioninthesurfaceofmem-branepore;(2)when1/3d/1theorganicmattermainlyleadtotheblockofthesurfaceofmembraneandofporesaswell,when1d/5/3,theorganicmattermainlycausedtheblockofthesurface;(3)whend/1,especiallyd/5/3,theorganicmatterwillbethemainpartsofthecake.Keywords:membraneresistance;fouling;molecularsizedistribution;UF;secondaryeffluent(21)StudyonmembraneselectioninanintegratedmembranecoupledanaerobicbioreactorWANGZhiwei,WUZhichao,GUGuowei,YuGuoping(PollutionControlandResourceResuse,StateKeyLaboratory,SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Membranecoupledanaerobicbioreactorprocessissuccessfullyusedinhigh-strengthwastewatertreatment.Membraneselectionisakeyfactorthatcanmaintainthesystemrunningsmoothly.Threedifferentmaterialmembranes-PAN,PESandPVDFwereinvestigatedinthisintegratedmembranecoupledanaerobicbioreactor.Mathematicalmodelsofmembranefluxandmembraneresistancewithoperationtimewereobtainedbyfittingexperimentaldata.TestresultssuggestedthatthePANmembranefluxmaintainedatahigherlevelthanothertwomembranes,andthemembraneresistanceincreasedveryslowly.Therefore,ThePANmem-branewasfitfortheMCABsysteminthistest.Keywords:membranecoupledanaerobicbioreactor(MCAB);membranematerial;flat-sheetstylemembrane;wastewatertreatment　2　:·31　　　·