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33Vol.3,No.320093ChineseJournalofEnvironmentalEngineeringMar.2009C/NMBR(,210009)MBRC/N,,1323,MLSS610618g/L,NH+42N50mg/L,015m3/h,HRT6h,C/N,C/N6181,TN79%89%,C/N,C/N,C/N61,0.4m3/h,TN85%,TNMBRDO(MBR)(SND)C/NX70311A167329108(2009)0320400205StudyoneffectsofC/Nratioandaerationrateonthesimultaneousnitrificationanddenitrification(SND)inMBRZhaoBingyiChenYingwenShenShubao(CollegeofLifeScienceandPharmaceuticalEngineering,NanjingUniversityofTechnology,Nanjing210009)AbstractTheeffectsofC/Nratioandaerationrateonthesimultaneousnitrificationanddenitrification(SND)inMBRwerestudied.Undertheexperimentalconditionsofambienttemperature1323,MLSS610618mg/L,aerationrate015m3/handHRT6h,withtheNH+42Nconcentrationininfluentof50mg/L,theremovalefficiencyofTNwasimprovedwiththeincreasingC/Nratio.WhentheC/Nratioswerefrom61to81,theremovalrateofTNreachedfrom79%to89%.ThedenitrificationwasinhibitedatlowC/NratioandaddingcarbonsourcecausedcostathighC/N.Whenotherconditionswerecontrolledthesameasbefore,theremovalrateofTNreached85%whenaerationratewas014m3/hwithC/Nratioof61.TheremovalrateofTNdecreasedwithahigherorloweraerationrate.Furthermore,thedistributionsofDOinMBRwerestudiedprimarily.Keywordsmembranebioreactor(MBR);simultaneousnitrificationanddenitrification(SND);C/Nra2tio;aerationrate:863(2006AA02Z211);(BK2006181,BK2007188);(2007020):2008-07-03;:2008-08-07:(1985),,,E2mail:zhaobingyi_@163.com(SND)[1,2]MBR,(MBR),,NH+42NMBR,(MLSS),MBR[36],,DO,,MBR,C/N,MBR3:C/NMBR11.1,150L,,,3min,1min,,,,,,015%,MLVSS210g/L,,75L,0155m3/L,1,,MLVSS015kg,MLVSS,,,,,4045d,MLVSS8g/L,,,SVI38551Fig.1SchematicdiagramofMBR,CH3COONa,(NH4)2SO4,,(KH2PO3,MgSO4,CaCl2)1.21.2.11323,,HRT6h,MBR610618g/L,NH+42N50mg/L,CODC/N,C/N31516181101121,013501401450150155m3/h,7dC/NMBR1.2.2[7]COD:;:N2(12)2;:;:;DO:JENCO9250M22.1C/N2.1.1C/NNH+42NNO-32NNO-22NNH+42N50mg/L,C/N31516181101121,COD150250300400500600mg/L,015m3/h2C/NNH+42NNO-32NNO-22NFig.2InfluenceofC/NratiosonremovalefficiencyofNH+42N,NO-32NandNO-22N2,C/NNH+42N,NH+42N415mg/L,92%,NH+42NC/NC/N31,NO-32N35101mg/L,1043C/N,,C/N81,NO-32N,TN89%,C/NTNC/NNO-22N,111mg/LC/N101,TN92%C/N31,TN21%,C/N,C/N,C/N,,,NO-32N,TNC/N,,TNC/N,C/N6181C/N61101,NH+42N,A/O,C/N6181MBR,C/NC/N,MBR2.1.2C/NCOD3,C/N,MBRCOD,72mg/L,MBRCODC/NCODNO-32N,,COD3C/NCODFig.3InfluenceofC/NratiosonremovalofCOD2.2C/N61,NH+42N50mg/L,013501401450150155m3/h,,DODO2.2.1NH+42NNO-32NNO-22NTN4,0135m3/h,NH+42N77%,,014m3/h,NH+42N1123mg/L,NH+42NNO-32NNO-22N,NH+42N98%014m3/h,NO-32NNO-22N,,0155m3/h,NO-32NNO-22N2715mg/L,45%014m3/h,TN817mg/L,TN85%014m3/h,TN;,014m3/h,,TN,TN,,,,,014m3/h4NH+42NNO-32NNO-22NTNFig14InfluenceofaerationrateonremovalefficiencyofNH+42N,NO-32N,NO-22NandTN2043:C/NMBR2.2.2COD5,COD,COD86%,5CODFig.5InfluenceofaerationrateonremovalofCOD2.2.3DODO,DO,7DO,DO,1,3,5,2,4,6,1,3,5DO2,4,6DO,DO,1DO3,5DO,3,5DO,2DO4,6DO,4,6DO,,DO,1,2,,,,,DO,6,,,DO,6,4,2,642,,MBRDO2.3C/NMBRC/N,,C/N,,C/NMBR,C/N;,014m3/h,,,,,,,,MBRC/NMBR,C/N,,,,,,,,;,,,3043,C/NMBR3MBR,C/N,C/N,MBRMBR,DO,(1)MBR,C/N6181,TN79%89%C/N,C/N,C/N(2)014m3/h,TN817mg/L,TN85%,TN(3)MBRDO,DO,DO[1]ElisabethV.Munch,PaulLant,JurgKeller.Simultane2ousnitrificationanddenitrificationinbench2scaleseguenc2ingbatchreactors.Wat.Sci.Tech.,1996,33(6):277284[2]KlangduenPochana,JurgKeller.Studyoffactorsaffectingsimultaneousnitrificationanddenitrification(SND).Wat.Sci.Tech.,1999,39(6):6168[3],,,.MBR.,2001,22(7):5155[4],,,..,2007,1(4):2628[5],,,.DOHRTMBR.,2007,39(6):888890[6],..,2007,33(2):2123[7].(4).:,2002404