生物滴滤塔反硝化净化NO废气的启动

2008,28(5)444~448ChinaEnvironmentalScienceNO,*,,(,310032)NO,(SBR)NO,.,NO(160mg/m3)(EBRT)113s,9d.NON2O,NO,NO;N2O.,NO,.NON2OX701A10006923(2008)05044405Studyonstart-upofbiotricklingfilterfornitricoxidedenitrification.NIJian-guo,WUCheng-qiang*,ZHURun-ye,CHENJian-meng(CollegeofBiologicalandEnvironmentalEngineering,ZhejiangUniversityofTechnology,Hangzhou310032,China).ChinaEnvironmentalScience,2008,28(5)444~448AbstractThestart-upofbiotricklingfilterwasstudiedwithsodiumnitrateandNOastheliquid-phaseandgas-phasenitrogensources,respectively,afterNOdenitrifyingbacteriawasacclimatedintheSequenceBatchReactor(SBR).Thebiofilminthebiotricklingfilterbecamematurewithin9datroomtemperaturewiththeNOinletconcentrationof160mg/m3andtheemptybedresidencetime(EBRT)of113s.NitratewasakeyfactorinfluencingNOremovalandtheproductionofnitrousoxide(N2O).NitrateimprovedthegrowthofNOdenitrifyingbacteriaandincreasedNOremoval.OveruseofnitrateresultedintheaccumulationofN2O.AbsorbanceofcirculationliquidandpressuredropwerepositivelycorrelatedwithNOremovalefficiency.Thetwoparameterscanthusbeusedasthekeyelementstoevaluatethestart-upandcompletionofbiotricklingfilter.KeywordsNON2Obiotricklingfilterdenitrificationstart-up(NOx,NO95%),[1].NOx.,NOx[25].NOxN2O.NO,NO,[6].(NO3NO2NON2O),.,NO[7],,,NO,,NON2O,NO.11.1.20070903(20776134);(Y505308,X506311)*,,[e-mail]5NO445SBR,3L,(MLSS)3g/L.1.21.SBR,,100mm,500mm,3.5L.40mm,1000mm.8mm(PU),600mm,200mm1.NONON2,.,,,.,,,,,.V221345137·7689101112141Fig.1Diagramofexperimentalsystem1.NO2.N23.4.5.6.7.8.9.10.11.12.PU13.NO/NOx14.1.3,SBR2,12h,,NO1L/min,2L/d,11h,50min,10min..(mg/L):300,KH2PO410,K2HPO410,MgSO4·7H2O10,FeSO45,CaCl25,Na2MoO4·2H2O1,CuSO45,MnCl21.,,NO,COD/TN7,pH7~8.,1L,.4h,,;NO,140~165mg/m3,0.4L/min,0.3L/h,1L,0.2L/d,pHNaOH7.4~7.6,.(mg/L):500,NaNO3205,KH2PO450,K2HPO420,MgSO4·7H2O10,FeSO45,CaCl25,Na2MoO4·2H2O1,CuSO45,MnCl21.1.4NOThermo42CHLNO/NO2(0~2000×106)42CNO/NO2(0~100×106).N2OAngilent68905975(GC/MS).CPPoraBondQ(25m×320µm×5µm),120,35,,2mL/min,400µL,5:1.NO2,NO3DionexICS-2000.AS19(4mm×250mm),,25µL,30,35,1mL/min,10mmol/LKOH;pHWTW330ipH.DP2000.22.1NO,NO.79d,NO68~222mg/m3,NO2.4462805010015020025001020304050607080(d)NO(mg/m3)020406080100NO(%)ABCA2SBRNOFig.2NOremovalefficiencycurveintheSBRreactorduringdomesticationA:NO3-N135.48mg/d;B:NO3-N677.42mg/d;C:NO3-N02,,NONO3N,47.4%,,.(NO),NO,26d(11.3%).35dNO3N,NO,53%.,NO.NO,,,.,NO,NO,NO.,NO,,,NO.N2ONO,,N2O.3,16d,NO3NNO2N0.2mg/L;N2O6d0.01mg/m33.1~3.7mg/m3..NO3N,NO3NNO2N18~22d36~51d,N2ONO3NNO2N,23d(23.79mg/m3).,NO3N,N2ONO3NNO2N,NO,N2O[8].PARK[9],N2O,pH,N2O,3.5mg/m3.NO,,(),pH6.5,N2O[10].0408012016020024001020304050607080(d)0510152025ABCANO2NNO3NN2ON2O(mg/m3)NO2NNO3N(mg/L)3NO3NNO2NN2OFig.3Variationsofnitrate,nitrite,nitrousoxideconcentrationintheSBRreactorduringdomestication22.2,30~40d[2,11].[12].,NO.2.2.1NONO,5NO447.4a,1d,NO30.6%,;NO3d,,9d98%.,.030609012002468101214NO(%)a0.000.040.080.120.1602468101214OD600nmbOD600nm01530456002468101214(d)(Pa)c4NOFig.4VariationsinNOremovalefficiency,OD600nmofcirculationliquidandpressuredropinthebiotricklingfilterduringitsstart-up(OD600nm),.,OD600nmNO,,9d(4b,4c).3,3[13];OD600nmNO3~5d.,.[5]NO.2.2.2N2ON2O5.0.00.51.01.52.0024681012(d)0123456NO3NNO2NN2ON2O(mg/m3)NO2NNO3N(mg/L)5NO3NNO2NN2OFig.5Variationsofnitrate,nitrite,nitrousoxideconcentrationinthebiotricklingfilterduringitsstart-up,;6d,,NO3N,,N2O,2d,.,.,,N2O.SBR,,N2ON2;,NON2O,.4482833.1NO,9d.3.2NON2O.NO,NO,NO,N2O.3.3,NO,.[1]FlanaganWP,ApelWA,BarnesJM,etal.Developmentofgasphasebioreactorsfortheremovalofnitrogenoxidesfromsyntheticfluegasstreams[J].Fuel,2002,81(9):19531961.[2]YangWF,HsingHJ,YangYC,etal.Theeffectsofselectedparametersonthenitricoxideremovalbybiofilter[J].J.Hazard.Mater.,2007,148(3):653659.[3]ChenJM,MaJF.Abioticandbiologicalmechanismsofnitricoxideremovalfromwasteairinbiotricklingfilters[J].J.AirWasteManage.Assoc.,2006,56(1):3236.[4],,.[J].,2007,27(1):132136.[5],,,.[J].,2006,26(3):262265.[6],.NOx[J].,1998,16(3):3739.[7],,,.[J].,2002,22(1):2831.[8]WrageN,VelthofGL,VanBeusichemML,etal.Roleofnitrifierdenitrificationintheproductionofnitrousoxide[J].SoilBiol.Biochem.,2001,33(12/13):17231732.[9]ParkKY,InamoriY,MizuochiM,etal.Emissionandcontrolofnitrousoxidefromabiologicalwastewatertreatmentsystemwithintermittentaeration[J].J.Biosci.Bioeng.,2000,90(3):247252.[10]ThornM,SorenssonF.Variationofnitrousoxideformationinthedenitrificationbasininawastewatertreatmentplantwithnitrogenremoval[J].Wat.Res.,1996,30(6):15431547.[11],,,.NOx[J].,2004,10(4):2430.[12],,,.[J].,2004,36(4):446449.[13],,,.[J].,2004,24(5):834840.(1982),,,,.2.(DOE)(NREL)(Chevron),.NREL,.NRELAlDarzins,20,1996.Darzinsr,2090,,,,.,,.NREL,.DonPaul,.Paul,..5NO449Chemical&EngineeringNewsNovember12,15(2007)