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18519979ENVIRONMENTALSCIENCEVol.18,No.5Sep.,1997-*邢传宏 钱 易(,100084)TardieuEric(,F78230)-.:HRT5hSRT30d4m/s75L/(m2h),CJ25.1-89,.COD98%NH3-N97%98%,SSE.coli100%.MLSSvminMLSS.41032105,1855.9m,c18.50.59m.,,,,,,.*:1996-11-0660,Smith,-(Ultrafil-trationMembraneBioReactorUMBR)[1].UMBRHRTSRT[2].,,[3,4].90,UMBR.-.11.1,1.3810.11()HRT;7SRT.530.43(ORP),ORP300400mV.62;9.1-1.2.3.4.5.6.7.8.9.10.11.12.1.2TECH-SEPKERASEPX3,7,4.5mm,40cm,2050nm,300000,0.04m2,45m3/(m2hMPa).,,.1.3,1.,,UMBR.,CODSS;,CODSS.1COD/mgL-1SS/mgL-1NH3-N/mgL-1E.coli/L-1/pH/400850300600104010510650807.58.5152522.1CODNH3-NMLSSSRT30d,HRT5h,4m/s,75L/(m2h),1.CODNH3-N2,COD10mg/L.10,,,,;,.2,UMBRCOD,COD24mg/L;NH3-N.SRT,.,UMBR,:COD10mg/L,NH3-N2.0mg/L,UMBR.,(CODNH3-N).2CODNH3-N,UMBR,MLSS3.,MLVSS/MLSS63%,UMBR.MLVSSMLSS,MLVSSMLSS-MLVSS,.3MLSS2.2UMBRUMBR2.SSE.coli,COD10mg/L(COD24mg/L),NH3-N2.0mg/L,1.5,pH.,UMBRCJ25.1-89..CODNH3-N98%97%98%,SSE.coli100%,.20182UMBRCJ25.1-89UMBR()/%SS/mgL-11050100COD/mgL-1505010(24)98NH3-N/mgL-120102.0(2.0)97/1051.5(1.5)98E.coli/L-1330100pH6.99.06.99.07.18.53UMBR3.1,,MLSS.UMBR,MLSS1520g/L,,.:UMBR500ml,MLSS17.7g/L,30,..HAAKEVT501,,UMBR,:..UMBR17.7g/L1,1/21/31/41/51/61/71/81/91/10,30,Excel5.04,R2=0.987,MLSS:=0.1488MLSS+1.036(1)MLSSg/L,mPas300.8mPas,UMBR303.62mPas,4.5,4MLSS.,MLSS.3.2UMBRMLSS,,MLSS.:,MLSS.:Re=evd(2):e=MLSS+1000(3)(1)(2)(3),SF:vmin=SFRe(0.1488MLSS+1.036)(MLSS+1000)d(4)UMBR,Re4000,SF1.2,MLSS02468101214161820g/Lvmin5.Excel5.0vminMLSS(5),R2=1.vmin=0.1545MLSS+1.1144(5)215,vminMLSS.MLSS,vmin,.5vminMLSS3.3,.,,,.,,;(),0,.,()v,,v99%,.-:1f=2log(Ref)-0.8(6)=32.8dRef(7)d=4.510-3m,Re=41032105,(6)(7),=1855.9m.c[5]:c=(NSC)1/3(8),NSC103,(8):c=10=18.5-0.59m(9),,,,,,UMBR.,,,,.4m/s.4(1)UMBR,CJ25.1-89,,.(2)HRT5hSRT30d75L/(m2h)4m/s,UMBRCODNH3-N98%97%98%;SSE.coli100%,.MLSS17.3g/L,MLVSS/MLSS63%,.(3)UMBR,MLSS.,UMBRvminMLSS.1SmithCVetal..TheUseofUltrafiltrationMembraneforActivatedSludgeSeparation.PresentedPaperat39thAn-nualPurdueIndustrialWasteConference,Indiana.19692BrindleKandStephensonT.Biotech.andBioeng.,1996,49:6013YamamotoKetal..Wat.Sci.Tech.,1989,21:434MollerEBetal..Wat.Res.,1995,29(4):11795,..:,1988:3653672218northernChina.ThemaximumvalueofN2Oemissionsfromforestandgrasslandsoilisabout23g/(m2h).AhighrateofN2Olossisobservedwhenthetemperatureislowerthan15.ThemaximumvalueofN2Onegativeemissionsashighas18.984g/(m2h)hasbeenmeasured.Keywords:N2O,O3,emissionflux,source,sink,exchangebetweenatmosphereandterri-tory.UltrafiltrationMembraneBioreactorforDo-mesticWastewaterTreatmentandItsHy-draulicBehavior.XingChuanhong,QianYi,(StateKeyLaboratoryofEnvironmentalSim-ulationandPollutionControl,Dept.ofEnvi-ron.Eng.,TsinghuaUniversity,Beijing,100084),TardieuEric(CIRSEE-LyonnaisedesEaux,38,rueduPresidentWilson,F78230LePecq.):Chin.J.Environ.Sci.,18(5),1997,pp.1922ItisproventhatUltrafiltrationMembraneBioReactor(UMBR)appliedtodomesticwastewatertreatment,underconditionsofhy-draulicretentiontime5h,sludgeretentiontime30d,membranesurfacevelocity4m/sandmembraneflux75L/(m2h),istechnicallyfea-sibleandreliableduringseveralweeks.Re-movalrateofCOD,NH3-N,andturbidityofthesystmeareequaltoorhigherthan98%,97%and98%,SSandE.coli.,100%.Theef-fluentqualityisalwaysbetterthanthequalitystandardforreuseissuedbytheMinistryofConstructioninChina.Furthermore,thehy-draulicbehaviorofUMBRisconciselydis-cussed.Thehydraulicboundarylayerisabout1855.9mthick,andthemasstransferboundarylayer,18.50.59mwhenthetypi-calReynoldsnumberis41032105.Keywords:ultrafiltrationmembrane,bioreac-tor,domesticwastewater,hydraulicbehavior,boundarylayerthick.SoilSensitivitytoAcidDepositioninSouthChina.CationLeachingandBufferingMechanism.QiuRongliangetal.(DepartmentofEnvironmentalScience,ZhongshanUniver-sity,Guagzhou510275):Chin.J.Environ.Sci.,18(5),1997,pp.2327Acidicdepositionisconsideredanenvironmen-talproblemthatmayaffectthesoil'scation-exchangestatus.Thisstudyusedcolumnleachingexperimentstoexaminetheinflu-encesofsimulatedacidrainwithdifferentpHvaluesonbasecationleachingofmainsoiltypescollectedfromSouthChina.TheresultsshowedthatamountsofleachingbasecationsincreasedobviouslywhenthepHvalueofsim-ulatedacidicrainwaslowerthan3.0or3.5,whiletheamountsalmostdidnotdifferwhenpHhigherthan3.5.TheleachingofCa2+andMg2+wasaffectedevidentlybythepHvalueofsimulatedacidicrain,comparedwiththeleach-ingofK+andNa+.TheH+bufferingmecha-nismswhichmayvaryindifferentsimulatedpHacidicrainareproposedformainsoilsstudied.ThedissolvingreactionofsaltswasthedominantresourcesofleachingbasecationsandH+bufferingwhenpHvaluehigh-erthan3.5.ThemechanismsofH+bufferingtreatedwithacidrainatpH3.5weretheex-changeablecationsandsulfatesorption.Dis-solvedaluminumonthebrokenedgeofclayandaluminumoxidesweatheringoforiginalandsecondarymineralsandsorptionofsulfateplayedagrearoleontheleachingofsoilcationsandH+bufferingwhenthesoilstreat-edwithacidrainofpHlowerthan3.5.Keywords:simulatedrain,basecations,leach-ing,soilsensitivity.StudiesonEffectofWaterTreatedbyHigh-VoltageElectrostaticFieldonOxygenUtiliza-tionRatingofActivatedSludge.YangFeng,KongJilie,DengJiaqi(Dept.ofChe