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2001,21(2)133~136ChinaEnvironmentalScience1,1,1,1,21.,1000852.,100036.,.3h,5.2L/h,80%.,,,.pH.5,,.X131.2A1000-6923(2001)02-0133-04Nitratenitrogenremovalfromgroundwaterbyautotrophicdenitrificationinapackedbedreactor.JIANGWei1,QUJiu-hui1,LEIPeng-ju1,LIUSuo-xiang1,MENGGuang-hui2(1.StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,China;2.PekingWaterSavingandSupplyingOffice,Beijing100036,China).ChinaEnvironmentalScience.2001,21(2)133~136AbstractAbiomembranepackedbedreactorwithsulfurandlimestoneassolidfillingmaterialforremovalofnitratenitrogenwasstudied.Theresultsshowthatbasedonthesupportofelectricsufur’sautotrophicdenitrificationbacteria,nitratenitrogenremovalisgoodwithefficiencyreachingmorethan80%astheretentiontimeislongerthan3hours.i.e.thetreatingcapacityofthereactorislessthan5.2L/h.Alongthecolumnheightofreactor,nitriteinthelowerpartofthecolumnincreasesfirstandthendecreases.Concentrationofsulfateincreasedstoichiometricallywiththereductionofni-trate,butthepHvaluedecreasesupwardalongthecolumnheight.Thereactorhasbeencarriedoutfor5monthswithnopluggingproblems.Keywordspackedbedreactorautotrophicdenitrificationnitratenitrogen,,[1](NO3--N).NO3--N,[2].NO3--N.NO3--N.,,,.,NO3--N,,.,,[2]-[3].,.,,NO3--N.,,.[4],[5]:55S+50NO3-+38H2O+20CO2+4NH4+→4C5H7O2N+25N2+55SO42-+64H+(1)2000-07-18(50078052);134211mg/LNO3--N7.54mg/LSO42-,./NO3-.11.1Fig.1Flowsheetoftheexperiment1.,18cm,2.4m,,0.95m,15.6L.,0.3,0.6,0.9m,1.5m.,.1:1,5cm,,5~7mm,64.5%.,,;.,NO3-,pH7.5,.1d,NO3-,20d.1.2,NO3-NO2-,Dionex4500i;pHOrion828pH;GLI8220.22.1NO3--N,.Na2SO3.NO3--NNO2--N2.NO3--N,1~5dNO3--N100mg/L,5~20d35mg/L,10mg/L.20d.0204060801000510152025303540dmg/L020406080100%2Fig.2NitrogenremovalcurveinbacteriatrainingstageNO3--NNO2--NNO3--NNNO3-4:2ON2NONO2NO3NONNONONO223───→────→────→────→─----(2)[4].2,,20d,NO2--N,11mg/L,NO3--NNO2--N,NO3--NNO2--N,.,NO3-,NO3-NO2-,,.2.2NO3--N10mg/L,2135,(3).3,3h,5.2L/h,80%.3h,5.2L/h,.0204060801000246810(h)%3Fig.3Removalefficiencycurveindifferentretentiontime..0.011kgNO3-/(m3⋅h),,.2.34,58h2.6h.02468100.00.51.01.52.0mNO3-N,NO2-N(mg/L)020406080100120140SO42(mg/L)48hFig.4Effectofcolumnheightonionconcentrationon8hNO3--NNO2--NSO42-4,5,NO2--N,.NO2--N,NO2--N1mg/L.,0.9m,.SO42-,,1mg/LNO3--N7.54mg/LSO42-.02468101200.511.52mNO3-N,NO2-N(mg/L)020406080100120140SO42(mg/L)52.6hFig.5Effectofcolumnheightonionconcentrationon2.6h42h,pH6.6,pH,pHpH0.6.6.87.07.27.47.67.800.511.52(m)pH6pHFig.6EffectofcolumnheightonpH2.4,5,.,10d,..,2NTU,.3NO3--N.13621,20d.3h,5.2L/h,80%NO3--N.,NO2--N,SO42-,NO3--N..[1]CaracoNF,ColeJJ.Humanimpactonnitrateexport[J].AnAnalysisUsingAmbio.,1999,28(2):167-170.[2]SakakibaraY,KurodaM.Electricpromptingandcontrolofdenitrification[J].Biotechnol.Bioeng.,1993,42:535.[3],,,.-[J].,2001,21(1):39-43.[4].[J].,1994,13(10):8-12.[5]vanderHoekJP,KappelhofJWNM,HijnenWAM.Biologi-calnitrateremovalfromgroundwaterbysulphur/limestonedeni-trification[J].J.ChemicalTech.Biotech.,1992,54:197-200.(1976-),,,,..-;/.2.20008(Science)(2000,289,1922~1924),(GHG)..,,...PhilRobertson,,N2O(GWP).N2OGWPCO2310,.Robertson,N2OCO2,GWP.GWP,GWP.RattanLalGWP1/3,BillSchlesingerLalN2O.EnvironmentalScience&TechnologyNovember1,455A-456A(2000)(FDA)(2000,65(166),51,833-51,839),.FDA.(SDWA)..FDA,,.,40.,,1/4,1/3.EnvironmentalScience&TechnologyNovember1,455A-456A(2000)