短程与全程硝化反硝化过程中N2O产量比较于德爽

N2O于德爽,　李　津,　陆　婕(青岛大学化学化工与环境学院,山东青岛266071)　　　:　采用序批式活性污泥反应器(SBR)对生活污水短程及全程硝化反硝化过程中N2O的产生量进行了考察。结果表明,在进水氨氮浓度相同且不限制DO的条件下,全程硝化反硝化过程中N2O的总产生量为短程硝化反硝化的2倍左右;硝化类型不会影响反硝化过程对溶解性N2O的还原,无论以NO-2-N还是以NO-3-N为电子受体,反硝化过程均有利于降低N2O的浓度。　　:　短程硝化反硝化;　全程硝化反硝化;　N2O产量:X703　　:C　　:1000-4602(2008)07-0066-04ComparisonofN2OProductionQuantitybetweenCompleteandShortcutNitrificationandDenitrificationProcessesYUDe-shuang,　LIJin,　LUJie(SchoolofChemicalandEnvironmentalEngineering,QingdaoUniversity,Qingdao266071,China)　　Abstract:　Thesequencingbatchreactor(SBR)wasadoptedtoinvestigateN2Oproductionquanti-tyincompleteandshortcutnitrificationanddenitrificationforsewagetreatment.Theresultsshowthatun-dertheconditionofsameammonianitrogenconcentrationandnotcontrollingDOconcentration,theN2Oproductionquantityincompletenitrificationanddenitrificationprocessistwiceofthatinshortcutnitrifi-cationanddenitrificationprocess.ThenitrificationtypesdonotaffectthereductionofsolubleN2Oindenitrificationprocess.WhethertakingNO-2-NorNO-3-Naselectronacceptor,thedenitrificationprocessisfavorabletoreduceN2Oconcentration.　　Keywords:　shortcutnitrificationanddenitrification;　completenitrificationanddenitrification;N2Oproductionquantity　　,N2。,N2,NON2O。NO,,,N2ON2[1]。N2O,N2O,0.4℃,10%～16%;N2OCO2190～270、CH44～21,5%～6%[2]。N2O,,,,120a[3];N2O,,O3,O3,NONO2,。20,N2O0.25%～0.30%,N2O、。N2O,N2O。、、、N2O。90%·66·第24卷　第7期2008年4月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.24No.7Apr.2008N2O[1]。N2O[4],N2O[5]。N2O,,N2O。1　装置与方法1.1　(SBR),SBR1SBR2。SBR,14L,、;,,,;;,,;pH、、pH、DOORP。1。1　Fig.1　Schematicdiagramofexperimentalset-upSBR3,、、、、,,。SBR1SBR2,SBR1330min,SBR2。1.2　,1。。(SBR1)20～25℃,(SBR2)30～32℃。1　Tab.1　QualityofinfluentpHCOD/(mg·L-1)NH+4-N/(mg·L-1)C/N7～8178～37535～784.901.3　NH+4-N、NO-2-N、NO-3-N、COD、TOC[6]。N2O:Agilent6890NN2O。HP-Plot(30m×0.53mm×25μm),:110℃,180℃,ECD300℃。3,。N2O:N2O。、,0.5mL1000mg/LHgCl2,;()N2,0.5h,N2O,N2ON2O。2　结果与讨论2.1　N2ON2O:,,N2O;,N2O。2SBR1N2O。2　N2OFig.2　N2Oproductionquantityinacycleofcompletenitrificationanddenitrificationprocess2,60min,N2O·67·于德爽,等:短程与全程硝化反硝化过程中N2O产量比较第24卷　第7期,。,,,N2ON2O,N2O,。,N2O,,N2O;,N2O,N2ON2。2.2　N2OSBR23。4SBR2N2O。3　Fig.3　Nitrogenconcentrationsinacycleofshortcutnitrificationanddenitrificationprocess4　N2OFig.4　N2Oproductionquantityinacycleofshortcutnitrificationanddenitrificationprocess,60min,N2O(2、4)。,,NH+4-N,NO-2-N,,NO-2-N,24.12mg/L,NO-3-N0.98mg/L,NO-2-N/NO-x-N94.23%(3)。,N2ON2O,0.77mg/L0.73mg/L,N2O0.04mg/L(4)。,,4,,N2O,,N2O,N2ON2,N2O。2.3　N2O2N2O。2　N2OTab.2　N2Oproductionquantityofcompletenitrificationanddenitrificationandshortcutnitrificationanddenitrificationprocessesmg·L-1　N2O2.47-0.022.451.19-0.031.16　　2,N2O2。,N2O;NO-2-NNO-3-N,N2O。Zeng,N2O[7];Park,NO-2-N,N2O[8]。:NO-2-NDO,N2O,DO。,SBR2,,DO,DO1.5mg/L,DON2O。N2O,N2O,·68·第24卷　第7期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　。3　结论①　DO,,N2O、N2ON2O;N2O2,NO-2-NNO-3-N,N2O,N2O。②　N2ON2O,N2O,N2O。:[1]　,,,.N2O[J].,2006,26(12):1940-1946.[2]IPCC.ClimateChange1995:theScienceofClimateChange[M].Cambridge:CambridgeUniversityPress,1996.[3]　SharmaC,GuptaPK,ParasharDC.Atmosphericnitrousoxide:sourcesandsinks[J].TropicalEcology,1996,37(2):153-166.[4]　PeterC,PatrickC,RobertHarriss.Nitrousoxideemissionfrommunicipalwastewatertreatment[J].EnvironSciTechnol,1995,29(9):2352-2356.[5]　HanakiK,ZhengH,MatsuoT.Productionofnitrousox-idegasduringdenitrificationofwastewater[J].WaterSciTechnol,1992,26(5-6):1027-1036.[6]　.(4)[M].:,2002.[7]　ZengRJ,LemaireR,YuanZ,etal.Simultaneousnitrifi-cation,denitrificationandPremovalinalab-scalese-quencingbatchreactor[J].JournalofBiotechnologyandBioengineering,2003,84(2):170-178.[8]ParkKY,InamoriY,MizuochiM,etal.Emissionandcontrolofnitrousoxidefromabiologicalwastewatertreat-mentsystemwithintermittentaeration[J].JournalofBio-scienceandBioengineering,2002,90(3):247-252.E-mail:[e-mail]:2007-12-10(上接第65页),。:[1]DierbergFE,DeBuskTA,JacksonSD,etal.Submergedaquaticvegetationbasedtreatmentwetlandsforremovingphosphorusfromagriculturalrunoff:responsetohydraulicandnutrientloading[J].WaterRes,2002,36(6):1409-1422.[2]　BaiXH,WangBZ,YuM,etal.Developmentofcon-structedwetlandandwastewatertreatmenttechnologyanditsapplicationinChina[J].JournalofHarbinUniversityofCivilEngineeringandArchitecture,1999,32(6):88-92.[3]　HumeNP,FlemingMS,HorneAJ.Plantcarbohydratelimitationonnitratereductioninwetlandmicrocosms[J].WaterRes,2002,36(3):577-584.[4]YingFengLin,ShuRenJing,TzeWenWang,etal.Effectsofmacrophytesandexternalcarbonsourcesonni-trateremovalfromgroundwaterinconstructedwetlands[J].EnvironPollu,2002,119(3):413-420.[5]　,,.[J].,2003,22(2):49-55.[6]　LimPE,WongTF,LimDV.Oxygendemand,nitrogenandcopperremovalbyfreewatersurfaceandsubsurfaceflowconstructedwetlandsundertropicalconditions[J].EnvironmentInternational,2001,26(5-6):425-431.[7]　VanOostromAJ.Nitrogenremovalinconstructedwet-landstreatingnitrifiedmeatprocessingeffluent[J].Wa-terSciTechnol,1995,32(3):137-147.:[phone]E-mail:[e-mail]:2007-12-29·69·于德爽,等:短程与全程硝化反硝化过程中N2O产量比较第24卷　第7期