地下渗滤污水处理系统的氮磷去除机理张建

2002,22(5)438~441ChinaEnvironmentalScience,,,,(,,100084).,2cm/d,COD90;COD0.2,30,0.025mg/L;,63.5%..50,...X131.2A10006932(2002)05043804Nitrogenandphosphorusremovalmechanisminsubsurfacewastewaterinfiltrationsystem.ZHANGJian,HUANGXia,WEIJie,HUHong-ying,SHIHan-chang(EnvironmentSimulationandPollutionControlStateKeyJointLaboratory,DepartmentofEnvironmentalSciencesandEngineering,TsinghuaUniversity,Beijing10084,China).ChinaEnvironmentalScience.2002,22(5)438~441AbstractNitrogenandphosphorusremovalmechanisminsubsurfacewastewaterinfiltrationsystemtreatingdomesticwastewaterwasstudied.Thehydraulicloadingwas2cm/d.TheexperimentalresultsshowedthattheremovalratesofNH4+N,CODandtotalphosphoruswereallover90%.TheeffluentconcentrationsofNH4+N,CODandtotalphosphorusbelow0.2,30and0.025mg/Lrespectively.Thetotalnitrogenremovalratewasachievedas63.5%.Theremovalefficiencyofcontaminantscouldbeimprovedthroughstrengtheningequalizationofflowdistribution.Biologicalnitrogenremovalthroughnitrificationanddenitrificationwasthemainremovalmechanismofnitrogen,whichcouldremoveabout50%ofinfluenttotalnitrogen.Howtoimprovedenitrificationprocesswasthekeytoenhancenitrogenremovalrate.Phosphorusinsewagewasmainlyremovedbyfixationprocessedinthesoil,suchasadsorptionandchemicalprecipitation.Keywordssubsurfacewastewaterinfiltrationsystemdomesticwastewaternitrificationdenitrificationnitrogenandphosphorusremoval,.,[1].,,[110].,,..,.11.11.20011217(200003)*5439.,,,,...2,70×75×80cm,2cm/d,,1,2,,.1.2COD,N-(1-)-;,.22.1.,.,,,,.2,,.1.35.6%,19.0%.2.22.2.1CODCOD2.COD93~264mg/L,,COD,30mg/L,COD90%.,.2CODFig.2ChangesofinfluentandeffluentCOD123Fig.3ChangesofinfluentandeffluentNH4+Nconcentration22.2.23.3,22.2~50.0mg/L,010203040253035404550dmg/L0102030405060253035404550dmg/L44022,0.2mg/L,99%,.4.4,43.41~49.28mg/L,25mg/L,.4Fig.4Changesofinfluentandeffluenttotalnitrogenconcentration22.2.3,.,[8,9],[3,4,8,9].4mg/L,,(0.025mg/L),100%.2.2.4112,(1):1000000×-=CQCQCQyee(1):y(%);Q0(L/d);C0(mg/L);Qe(L/d);Ce(mg/L).1,21.,,.112(%,45d)Table1Comparisonbetweenremovalratesofsystem1andthatofsystem2(%,45days)COD190.210053.299.8292.310063.599.92.32.3.12.,,70%,,98%.,.MikaelPell[4],,,6.7cm/d,1.5cm80%BOD5.,,,.2.3.2,.().,,,,,.NO3,NO3.NO3,,N2N2O[8].42d,20102030405060253035404550dmg/L5441,,M1.42dM2M3.pH,.(2)M4.M4=M2M1M3(2),,9.43g,49.11%;2.76g,14.36%,;7.01g.35~55g/(m2⋅a)[8],55g/(m2⋅a),42d3.32g,17%,,50%,..2.3.3[3,4]:()..,90%,,10%.33.12cm/d,COD90%,63.5%,,.3.2,..[1]USEPA.Wastewatertreatment/disposalforsmallcommunities[M].1992.7579.[2]RobertLSiegrist.Soilcloggingduringsubsurfacewastewaterinfiltrationasaffectedbyeffluentcompositionandloadingrate[J].J.Environ.Qual.,1987,16(2):181187.[3]DonaldBAulenbach,NieMeisheng.Studiesonthemechanismofphosphorusremovalfromtreatedwastewaterbysand[J].J.WPCF,1988,60(12):20892094.[4]MikaelPell,FredNyberg.Infiltrationofwastewaterinanewlystartedpilotsand-filtersystem:.Reductionreductionoforganicmatterandphosphorus[J].J.Environ.Qual.,1989,8:451475.[5]MikaelPell,FredNyberg.Infiltrationofwastewaterinanewlystartedpilotsand-filtersystem:.Developmentanddistributionofthebacterialpopulations[J].J.Environ.Qual.,1989,8:457462.[6]MikaelPell,FredNyberg.Infiltrationofwastewaterinanewlystartedpilotsand-filtersystem:.Transformationofnitrogen[J].J.Environ.Qual.,1989,8:457462.[7]BaveyeP,VandevivereP.Environmentalimpactandmechanismsofthebiologicalcloggingofsaturatedsoilsandaquifermaterials[J].CriticalRev.Environ.Sci.Tech.,1998,28:123191.[8],.[M].:,1991.[9],,.[J].,1999,12(3):47.[10],,.[J].,1998,24(12):3234.(1976),,,,.5.