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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(11,100124;21,116600):,Carrousel,,15140181,(maximumspecificdenitrificationrate,MSDR),6151mgP(gh),(denitrificationyield,DY),0148,1MSDR,0191mgP(gh),.,,1,MSDR3163mgP(gh),(volatilefattyacids,VFAs)1(1514018)MSDR20,.:;;;:X701.3:A:025023301(2009)0120108206:2008201210;:2008203231:(2006BAC19B03);2;;(ykj2200721518):(1982),,,,E2mail:yinfangfang8@emails.bjut.edu.cn3,E2mail:wsy@bjut.edu.cnEffectsofCarbonSourceTypesonDenitrificationPerformanceatLowTemperatureYINFang2fang1,WANGShu2ying1,ANGXue2ye2,HOUHong2xun1,PENGYong2zhen1,WANGWei1(1.KeyLaboratoryforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China;21DalianNationalitiesUniversity,Dalian116600,China)Abstract:Toinvestigatetherespondingbehaviorofdenitrifyingbacteriatodifferentcarbonsource(i.e.methanol,ethanol,sodiumacetate,sodiumpropionate,glucose,domesticwastewaterandendogenouscarbonsource),severalbatchexperimentsusingthesludgefromtheCarrouseloxidationditchwerecarriedoutat1514018.Theresultsfromsodiumacetatefeedingexperimentshowthehighestmaximumspecificdenitrificationrate(MSDR),whichis6151mgP(gh).However,thedenitrificaionyield,whichis0148,isatlowestlevelandanobviousaccumulatingofnitriteisobserved.Comparedtotheothersolecarbonsource,alowerMSDR,0191mgP(gh)isshownwhenmethanolisusedascarbonsource,whichalsosuggeststhatthesufficientadaptationtimeshouldbepromisedfordenitrifyingbacteria.Whenthereactorisoperatedwithoutexogenouscarbonsource,denitrifyingbacteriacanusetheendogenouscarbonsourceaselectrondonorfordenitrification,butthespecificdenitrificationrateisatlowestlevelaccordingly.TheMSDRvalueof3163mgP(gh)isobtainedwithfermenteddomesticwastewaterfeeding,whichisequivalenttotheMSDRattainedfromthetestusingVFAsascarbonsource.ThoughtheMSDRdecreasesalotatlowtemperature,externalcarbonsourceadditionimprovesthedenitrificationperformancetosomeextentdefinitely.Keywords:denitrification;carbonsource;lowtemperature;specificdenitrificationrate(biologicalnutrientremoval,BNR),,.,.,.,.,.,[1,2].[3,4],[5]..,,(.,,,.,,20[69],2030120091ENVIRONMENTALSCIENCEVol.30,No.1Jan.,2009©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(),.,.1.2Carrousel,12,.,,BOD.2h,BOD.15SBR,.6SBR,11;21;31pH;41ORP;51DO;61;711SBRFig.1Schematicsofsequencingbatchreactor,.7SBR,,11()SBR.3molPLHCl3molPLNaOHpH=7112,pH,71128153.,15VSS2342mgPL,67VSS22732264mgPL.1514018,120min,30min1,TOCTNNO-32NNO-22NNH+42N,.1PmgL-1Table1InitialnitrogenandcarboncontentforeachreactorPmgL-11()2()3()4()5()6()7()NH+42N00000048150NO-22N0140140140140140122167NO-32N2513525135251352513525135241009180TN26262626262416866131TOC6817681768176817681791661112pH71127112711271127112711271121.3TOCTNmultiNPC3000(Analytikjena,German);;N2(12)2;;;pHWTWinolablevel2.22.19011:©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(MSDR)DO,[10]:qn=qn,maxcKn+cSKs+S(1),qnNO-x2N,h-1;qn,maxNO-x2N,h-1;ctNO-x2N,NO-32NNO-22N,mgPL;StBOD5,mgPL;KnNO-x2N,mgPL;KsBOD5,mgPL.Kn,,Kn011mgPL.Ks,Ks,Ks011mgPL()[11].,,KnKs,,(1)MSDR[mgP(gh)]:qn=qn,max=MSDR(2),,MSDRNO-x2N2.,CPN(TOCPNO-x2N=2167),NO-x2N,MSDR,6151mgP(gh)1,MSDR3126mgP(gh)1NO-x2N,MSDR,114311350191mgP(gh).(VFAs),,MSDR,NO-x2N,,,[12].2A(TCA),C3,,NO-x2N.2NO-x2N,MSDR,Tam[13]MSDR.,:C1,TCA,;Tam,,,,.,,,[14].,,,,.2NO-x2NFig.2VariationofNO-x2Nconcentrationwithdifferentsolecarbonsource21514018MSDR.(),2MSDR.,220MSDR(1514018)MSDR.,20MSDRMSDR59,,Elefsiniotis[12].,,.,,,,2h,NO-x2NTOC.,.2.1.2(DY),.,,(),,.,01130©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(DY):=NC(3),(DY);N(NO-x2N),mgPL;C(TOC),mgPL.2(MSDR)1)Table2InfluenceoftemperatureonMSDRwithsolecarbonsourcePMSDRPmg(gh)-10.911.3515140186.513.261.43257.0[15]2012.0[15]2030.0[16]2515.0[17]209.60[18]1),90min,1gNO-32N(TOC)0171g,114.,,114.01931109,0154.,.,.,(PHB),.,.,,[19],.,,.3,,0148,TOCNO-x2N.Constantin[20],.,0191.,.,,,,,.3NO-x2NTOCTable3NO-x2N,TOCconcentrationofinfluentandeffluentineachreactoranddenitrificationyieldwithdifferentcarbonsourceNO-x2NinPmgL-1NO-x2NoutPmgL-1TOCinPmgL-1TOCoutPmgL-1251752116768176410201872517519182681760107016925175112168171717801482517510156681752101019125175191268175611301522.1.33,NO-32NNO-x2N.,NO-x2NNO-22N,NO-32N,NO-32NNO-x2N.,,NO-22N.,,,,TN18173%,.[(4)][21],:NO-3(va,Ea)NO-2(vi,Ei)N2(4),vaEaNO-3NO-2,Ea31684188kJ;viEiNO-2N2,Ei1318620108kJ.,vavi,,vavivi,NO-2.NO-2,,vi.,NO-2.,viva,viva,NO-2.,viva,NO-2,NO-2NO-30,.,,NO-2.(4),NO-3NO-2NO-2N2,,NO-3NO-2NO-2N2,vavi.1111:©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[22][23].,,.2.24,,TOC,NO-x2N,,0115mgP(gh).,,.,.,,,[24].2.35,90min,NO-32N9180mgPL01048mgPL,,,(MSDR)3163mgP(gh),.,TOCVFAs.,,MSDR,4Fig.4Characteristicofdenitrifyingprocessusingend