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MBR1,2,1,1(1.,150090,E2mail:lpzou@china.com;2.,150000):DOC/NpH.,,.DO1mg/LC/N30pH712CODNH+4TN96%95%92%.:;;DO;C/N;;:X703.1:A:025023301(2001)0420520051:(962909201202204):(1969),,.:2000212204TheInfluenceofEcologicalFactorsonSimultaneousNitrificationandDenitrificationinMBRZouLianpei1,LiuXudong2,WangBaozhen1,FanYanzhen1(1.SchoolofMunicipal&EnvironmentalEngi2neering,HarbinInstituteofTechnology,Harbin150090,ChinaE2mail:lpzou@china.com;2.HarinBureauofWaterConservancy,Harbin150000,China)Abstract:Theinfluenceofdissolvedoxygen(DO),C/NandpHonsimultaneousnitrificationanddenitrificationinthemembranebioreactorwasstudied.Theexperimentalresultsshowedthatonlyunderconditionthateachecologicalfactorwasmaintainedrelativesteady,simultaneousnitrificationanddenitrificationmightproceedsmoothly.WhenDO,C/NandpHoffeedwaterwas1mg/L,30and7.2,theremovalrateofCOD,NH+4,andTNwere96%,95%and92%respectively.Keywords:membranebioreactor;wastewatertreatment;dissolvedoxygen(DO);C/N;ecologicalfactors;simultane2ousnitrificationanddenitrification,DOF/MC/NpH.DOC/NpH.MLSS80009000mg/L.DOC/NpH.11,8,,0105m,0135m,115m2.418L,24,2,,2,.,5.H.1,23,2514L.3HRT5h,DO.22420017ENVIRONMENTALSCIENCEVol.22,No.4July,2001©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.21314151617181911Fig.1Experimentalconfiguration2,,COD600mg/L,NH32N20mg/L,2147511mg/L.3DO3.1DOCODDO6mg/L3mg/L1mg/L015mg/LCOD2.2DOCODFig.2EffectofDOconcentrationonCODremovalefficiency2,DO6mg/L,COD98%,DO3mg/LCOD9615%.DO3mg/L,COD,COD(COD)COD.DO1mg/L,COD,COD,,COD96%.DO015mg/L,CODCOD,COD90%,.3.2DO3,DO3mg/L,1mg/L,98%99%.DO1mg/L,,2mg/L,,95%.DO015mg/L,.40%50%.3DOFig.3EffectofDOconcentrationonNH32Nremovalefficiency3.3DO(TN)4DOTN,DO6mg/L,TN60%,DO,DO,,NH+4,TNTN.,,DO,,.DO3mg/L,TN,,TN7mg/L,75%.DO1mg/L,TN,TN3mg/L2522©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,TN92%.DO015mg/L,DO,,NH+4,TN.4DOTNFig.4EffectofDOconcentrationonTNremovalefficiency314DO1mg/LC/N1,C/N,NH+4,NH+4CODC/N,NH+4,,NH+4.TN2,NH+4;COD.,C/N(5),NH+4,C/N30.,,.C/N,C/N.1DO1mg/LC/N/mgL-1Table1EffectofratioofCandNonsimultaneousnitrificationanddenitrificationinMBRwith1mg/LofDOCOD/NCODTN/%/%/%31.54661.3421.496.7620.970100220.995.9120.59403.616.495.9619.650.0399.8518.72.188.779.69412.319.9495.1642.85.568739.5611.271.695198.5414.692.6543.215.9363.1342.533.7320.64315DO1mg/LpH2,pH4176917COD,NH+4TN.pH418NH+460%,TN45%;pH712NH+499%,TN90%;pH916NH+475%,TN59%.pH5,,pH5,,pH5,pH613,pH916,pH819,pH.,pH.2DO1mg/LpH/mgL-1Table2EffectofpHvalueonsimultaneousnitrificationanddenitrificationinMBRwith1mg/LofDOpHCODNH+4TN/%/%/%4.8639.958.6190.8421.535.3875.0119.278.8354.184.76628.623.596.2620.6711.7543.1521.113.436.497.162412.5497.9922.62010023.212.3989.77.363115.697.5321.80.0699.7320.631.9890.49.6621.6446.892.8720.354.9875.5321.29.455.679.7630.250.6491.9722.375.575.4123.068.7861.93354©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.4,,.,,,.5[1],,,,.pHDOF/MC/N.pH810814,pH615715,pH715..2030,2040.15,,,.24.DO1mg/L,,,DO1115mg/L,,DO015017mg/L,.DO015mg/L,,[2].,DO,,5DOFig.5PatternofDOandsubtrateconcentrationinsludge.,,.,.,,,,,,.,3,,F/M,DO,,;DO,DO,,,,DO,,,.,DO1mg/L,COD,,,;2.Laanbroek[3],DO.012014mg/L,112115mg/L.,DO1mg/L,NO-2,NO-2,,DO,,NO-2.2,NO-2NO-3,.NO-2+0167CH3OH+0153H2CO30104C5H7NO2+0148N2+1123H2O+HCO-3(1)NO-3+1108CH3OH+0124H2CO34522©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.01056C5H7NO2+0147N2+1168H2O+HCO-3(2)(1)(2),1gNO-21gNO-3N2,1153g2147g[4].MBR,,,,.,,,,.DO,,DO,.,,,,.,,.pH,1g7114g(CaCO3),1gNO-3315g,2NO-2,.,,.,,NO-2,,NO-2NO-3..5(1),MLSS80009000mg/L,24,CODNH+4523700mg/L1712424mg/L,DO6mg/L3mg/L1mg/L015mg/L,CODNH+4TN98%99%60%;9615%98%75%;96%95%92%;90%70%60%.,DO1mg/L,DO,MBRCODNH+4,TN.(2)MBRDO1mg/LC/N2030CODNH+4TN;C/N10COD,NH+4TN;C/N5COD,NH+4TN.,,,.C/N30,C/N,C/N.(3)pH4176917CODNH+4TN,pHMBR.(4)C/N30pH71224DO1mg/L,CODNH+4TN,,.:1,.[J].,1998,24(12):69.2.[M],.,1996.276279.3LaanbroekHJ,GerardsS.CompetitionforlimitingamountsofoxygenbetweenNitrosomanaseuropaeaandNitrobacteriawinogradskyigrowninmixedcontinuouscultures[J].ArchMicrobiology,1993,159:453459.4,.[M].:,1998.51.554©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.