原水水质对输水管道硝化作用形成的影响

中国环境科学2014,34(2)：359~363ChinaEnvironmentalScience原水水质对输水管道硝化作用形成的影响张达,杨艳玲*,李星,相坤,刘扬阳,许美玲,黄柳,陈楠(北京工业大学,北京市水质科学与水环境恢复工程重点实验室,北京100124)摘要：采用配制水样模拟Ⅱ类、Ⅲ类和劣Ⅴ类地表水,利用管道模拟反应器研究不同原水水质条件下输水管道中硝化作用的形成及对输水水质的影响.结果表明:原水中氨氮(NH4+-N)及溶解氧(DO)含量对NH4+-N去除均有一定影响,DO充足时,去除率随原水中NH4+-N含量的增加而增加,DO浓度低时,DO成为影响NH4+-N去除的主要因素;原水NH4+-N含量对运行初期NO2--N积累有重要影响,NH4+-N含量越高,NO2--N积累量越大,随着生物膜的成熟,影响作用逐渐减弱;反应器中AOB数量主要受原水NH4+-N浓度的影响,随NH4+-N浓度升高而增加;NOB数量受NH4+-N和DO浓度的双重影响,DO含量低会抑制NOB活性,使NOB数量减少,导致NO2--N积累;输水管道中的硝化作用是水中及生物膜中硝化细菌共同作用的结果,但生物膜中硝化细菌存在水平高,其硝化作用占主导地位.关键词：生物膜；原水水质；硝化作用；输水管道中图分类号：X703文献标识码：A文章编号：1000-6923(2014)02-0359-05Effectofrawwaterqualityonformationofnitrificationinwaterdistributionpipes.ZHANGDa,YANGYan-ling*,LIXing,XIANGKun,LIUYang-yang,XUMei-ling,HUANGLiu,CHENNan(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China).ChinaEnvironmentalScience,2014,34(2)：359~363Abstract：Effectofrawwaterqualityonnitrificationformationanditsinfluenceoneffluentinwaterdistributionpipeswerestudiedbypipelinereactorssimulatedthewatersituation.WatersampleswerepreparedinlaboratorytosimulateClassⅡ,ClassⅢandClassⅤofthesurfacewaterstandard.Theresultsshowedthattheconcentrationofammonianitrogen(NH4+-N)anddissolvedoxygen(DO)inrawwaterhadsignificanteffectonNH4+-Nremoval.UndersufficientDO,removalrateofNH4+-NimprovedwiththeincreasingNH4+-Nconcentrationinrawwater.WhenDOwasinsufficient,NH4+-NremovalwaslimitedbyDO.Accumulationofnitritenitrogen(NO2--N)wassignificantlyaffectedbyconcentrationofNH4+-Ninrawwateratinitialstageofbiofilmformation.NO2--NaccumulatedmoreseriouswithhigherNH4+-Ncontent,buttheinfluencegraduallyweakenedasthebiofilmmatured.ThequantityofAOBwasconsiderablyaffectedbyconcentrationofNH4+-Ninrawwater,andAOBquantityincreasedwiththeconcentrationofNH4+-N.ThequantityofNOBwasconsiderablyaffectedbytheconcentrationofbothNH4+-NandDOinrawwater.LowDOconcentrationwouldinhibitactivityofNOB,resultedinfewerquantityofNOBandlessaccumulationofNO2--N.Nitrificatio