低温SBR反硝化过程亚硝态氮积累试验研究孙洪伟

SBR,＊,,,,,(,　100124):SBRUASB,SBR.,,5(、、、)SBR.,13.9℃,、、、,.,4NO-3-N(64.9、54.8、49.3、29.5mgL),NO-2-N37.8、21.5、25.2、18.8mgL,(NVSS·t)0.117、0.136、0.235、0.068g(g·d),ORP“nitrateknee”“nitriteknee”2,NO-3-N、NO-2-N.:;;;;;SBR;ORP:X703.1　:A　:0250-3301(2009)12-3619-05:2009-01-16;:2009-05-04:(863)(2006AA06Z319);(50778005);(8062006);(8091001):(1976～),,,,E-mail:[e-mail]＊,E-mail:[e-mail]ingtheDenitrationProcessinSBRatLowTemperatureSUNHong-wei,WANGShu-ying,WANGXi-ming,SHIXiao-ning,YANGQing,PENGYong-zhen,ZHANGShu-jun(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China)Abstract:NitriteaccumulationduringthedenitrationprocesswithSBRtreatingpre-treatedbyanoxicanaerobicup-flowanaerobicsludgebed(UASB)wasobservedatlowtemperatures.Theeffectsoftypesofcarbonsourcesonnitriteaccumulationwereinvestigatedforcomprehensiveunderstandingthemechanismofnitriteaccumulation.Experimentalresultsclearlyshowedthatnitriteaccumulatedobviouslywhenfivecarbonsources(methanol,ethanol,sodiumacetate,sodiumpropinoateandglucose),exceptforglucose,wereusedaselectrondonor.Additionally,nitriteaccumulationswereobservedatfourdifferentinitialnitrateconcentrationsandlowertemperatures.Themaximumconcentrationsofnitriteaccumulationwere37.8,21.5,25.2and18.8mgL,respectively,andthecorrespondingnitriteaccumulationrates(NVSS·t)were0.117,0.136,0.235and0.068g(g·d)duringthenitriteaccumulationperiod.Twobreakpiontsof“nitrateknee”and“nitriteknee”onoxidationreductionpotential(ORP)profileindicatedthatthereductionreactionsofnitrateandnitritewerecompleted,respectively.Keywords:landfillleachate;lowtemperature;denitration;nitriteaccumulation;carbonsource;sequencingbatchreactor(SBR);oxidationreductionpotential(ORP)　　(NaR)、(NiR)、(NoR)(N2oR),N2,[1]:NO-3-NNaRNO-2-NNiRNONoRN2ON2oRN2(1)　　NO-2-N,NO-2-N(rRed,NO-2-N),NO-3-N(rRed,NO-3-N),NO-2-N,[2].SBRUASB,15.5～13.5℃,SBR..3:13.9℃,(rRed,NO-2-N)、(rRed,NO-3-N)(rAccu,NO-2-N);NO-3-N;ORP“”(nitrateknee)“”(nitriteknee)、.1　1.1　SBR,200mm,210mm,500mm.9L.4,100mm.3012200912　　　　　　ENVIRONMENTALSCIENCEVol.30,No.12Dec.,2009DOI:10.13227/j.hjkx.2009.12.025,,.,.SBR:、,(、),(、),、.1.2　SBRUASB.UASB,SBR.UASB(SBR):NH+4-N111.5～250mgL,COD517.2～934.2mgL,pH8.15～8.63.:NH+4-N、NO-3-N、NO-2-N[3],WTWDO、ORP、pH.1.3　,.(1):,.rRed,NO-3-N=ΔcNO-3-Nt　　:,.rAccu,NO-2-N=ΔcNO-2-Nt　　:,.rRed,NO-2-N=rRed,NO-3-N-rAccu,NO-2-N　　(2):,.rRed,NO-3-N=ΔcNO-3-N/t　　:,.rRed,NO-2-N=ΔcNO-2-N/t　　(3),.r=ΔcNO-3-N/t,ΔcNO-3-NNO-2-N,mgL;t,h;t,h;t,h.1　、Fig.1　Effectsoftypesofcarbonsourceonratesofnitratereduction,nitritereductionandnitriteaccumulation2　2.1　rRed,NO-3-N、rAccu,NO-2-N、rRed,NO-2-N1.:MLSS=3.12gL,13.9℃(20081,).3620　　　　　　30SBRNO-3-N,NO-3-N78.6mgL,、、、,rRed,NO-3-N、rAccu,NO-2-N、rRed,NO-2-N.,、、,0～4、0～2、0～40～2h,,30.9、31.7、37.6、16.5mgL.90.3%、77.8%、92.6%55.4%.,.2,1.,,rAccu,NO-2-NrRed,NO-3-N,15.8、30.6mg·(L·h)-1,0.14、0.28g(g·d).4rRed,NO-3-N、rAccu,NO-2-N:rRed,NO-3-N,=1.68rRed,NO-3-N,=1.73rRed,NO-3-N,=1.82rRed,NO-3-N,rAccu,NO-2-N,=1.69rAccu,NO-2-N,=1.90rAccu,NO-2-N,=2.05rAccu,NO-2-N,,4rAccu,NO-2-N、rRed,NO-2-N::rRed,NO-2-N=1.3rAccu,NO-2-N;rRed,NO-2-NrAccu,NO-2-N;,.,、,NO-2-N0.072、0.07、0.060.036g(g·d).1(c)NO-3-N()、NO-2-N()NO-2-N().,NO-3-N,NO-2-N.、,NO-2-N,,NO-2-N.,,,Alcaligenesp.,,[4].1　1)Table1　ReactionratesofdenitrationwithdifferentcarbonsourcesNO-2-NNO-2-Nhmg·(L·h)-1hmg·(L·h)-10～417.710.07.74～81.27.70～230.614.715.82～63.27.50～418.28.89.34～100.86.20～216.88.58.32～67.33.9———————1),g·(g·d)-12.2　,SBRNO-3-N、NO-2-NORP:SBR,.15.5～13.5℃(20081,),4NO-3-N(64.9、54.8、49.3、29.5mgL),SBRNO-3-N、NO-2-NORP.2.,,,CN5～6;NO-2-N0.5mgL,NH+4-N0.12mgL.　　2,15.5～13.5℃,4NO-3-N,,NO-2-NNO-3-N,NO-3-N,NO-2-N,.3、2、1、2h,NO-2-N,37.8、21.5、25.2、18.8mgL.,ORP“(nitrateknee)”“(nitriteknee)”2.NO-3-N、NO-2-N,ORP“nitrateknee”、“nitriteknee”[5～9].,,SBRORP“nitrateknee”“nitriteknee”.,NO-3-N、NO-2-N,ORP“nitrateknee”“nitriteknee”2,362112:SBR2　NO-3-NSBRNO-3-N、NO-2-NORPFig.2　CorrelationbetweenvariationsofNO-3-N,NO-2-NandORPatdifferentinitialNO-3-NconcentrationsduringdenitrationinSBR　NO-3-N、NO-2-N.ORP.“nitrateknee”“nitriteknee”ORPORPNO-3※NO-2ORPNO-2※N2.ORPNO-3※NO-2“nitrateknee”,,NO-2-NNO-3-N+NO-2-N,NO-3-N※NO-2-N,NO-2-N※N2,NO-3-N‖NO-2-NNO-2-N‖N2(E)ORP.ORPNO-2※N2“nitrateknee”“nitriteknee”,NO-3-N(5mgL),NO-2-N,ORPNO-2※N2NO-2-N‖N2E.,,ORP.“nitriteknee”,ORP,.2“nitriteknee”ORP.,,,ORP.NerstE.E=E0-2.303RTnFlg[Red][Ox](2),E0;n;R;T,F,96487C;[Red];[Ox].,,NO-3-N、NO-2-N,ORPNO-3-N、NO-2-N.,NO-3-N、NO-2-N[1],,ENO-2NO-3、EN2NO-20.43V0.956V,2“nitrateknee”“nitriteknee”.NO-3+2H++2eNaRNO-2+H2O-82.9kJ·mol-1(3)NO-2+4H++3eNaR12N2+2H2O-277kJ·mol-1(4)3622　　　　　　303　　　,,,[10～12].Peter[2],3.(NiR),,;Bock[13],Nitrobactersp.NO-3-N※NO-2-N,,.,,.Bdaszczyk[14]、..,,,,..2:Bdaszczyk、,,.,,;,Bdawzcayk,.4　(1)SBR,,.(2),13.9℃,、、,,,.,.(3)SBR,ORP“(nitrateknee)”“(nitriteknee)”2,NO-3-N、NO-2-N,,NO-2-N.:[1]　TchobanoglousG,BurtonFB,StenselHD.Wastewaterengineeringtreatmentandreuse[M].(FourthEdition).USA:McGraw-HillCompanies,2003.[2]　PeterA,WarrenL,JonesUD.Competitionindenitrificationsystemsaffectingreductionrateandac