溶解氧对长距离输水管道水质影响

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1、网络出版时间：2013-10-1115:38网络出版地址：http://www.cnki.net/kcms/detail/11.1946.TQ.20131011.1538.004.html溶解氧对长距离输水管道水质影响张达，杨艳玲*，李星，相坤，刘扬阳（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：为保证长距离输水管道输送水水质，采用管道模拟反应器考察了溶解氧（DO）对输水管道水质影响以及曝气++充氧后水质恢复情况。结果表明：DO降低影响氨氮（NH4-N）的去除，DO浓度越低越不利于NH4-N的去

2、除，且-1-1+曝气充氧后恢复越缓慢，DO=0.5mg.L和DO=1.5mg.L的反应器在运行95h后，NH4-N去除率分别由90%降到21%--和85%，曝气充氧54h和3h后恢复；DO浓度降低导致亚硝酸氮（NO2-N）积累明显增加，DO浓度越低，NO2-N-1--1的积累越严重，且曝气充氧后恢复越缓慢，DO=0.5mg.L的反应器在运行95h后，出水NO2-N由0.02mg.L增加-1-1--1到0.354mg.L，曝气充氧54h后恢复，DO=1.5mg.L的反应器在运行32h后，出水NO2-N达到最大值0.112mg.L，

3、-1-1曝气充氧4h后恢复；DO浓度降低使水中UV254升高，DO=0.5mg.L和DO=1.5mg.L的反应器在运行2h后，出水UV254分别增加了70.8%和20.8%，均在运行32h后恢复，且曝气充氧后保持稳定。因此，DO对长距离输水管道水质具有重要影响，可采用DO实现对水质的调控。关键词：厌氧；输送水水质；曝气；长距离输水管道；生物膜中图分类号：TU991文献标识码：A文章编号：Effectofdissolvedoxygenonwaterqualityinlongdistancepipelinetransportatio

4、nZHANGDa,YANGYanling,LIXing,XIANGKun,LIUYangyang(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124)Abstract:Toensurethewaterqualityinlongdistancepipelinetransportation,theinfluenceofdissolve

5、doxygen(DO)onwaterqualityandrecoveryprocessafteraerationoxygenationwerestudiedinapipelinereactorthatcouldsimulatethislongdistancepipelinetransportation.Theresultsshowedthatthedecreaseof+DOcouldreducetheremovalofammonianitrogen(NH4-N),andthelowerDOconcentrationwasthem

6、ore+unfavorableremovalofNH4-N,theslowerrecoveryafteraerationoxygenationwas.TheremovalrateofNH+-Ndeclinedfrom90%to21%and85%afterreactorrun95hatDO=0.5-1-14mg.Land1.5mg.L,,andtherecoveryafteraerationoxygenationtook54hand3hrespectively.Theaccumulationofnitritenitrogen-(N

7、O2-N)increasedsignificantlyasDOreduced,andthelowerDOconcentrationwasthemorefavorableaccumulationofNO--N,theslowerrecoveryafteraerationoxygenationwas.AtDO=0.5-12mg.Lnitritenitrogen-1-1increasedfrom0.02mg.Lto0.354mg.Lafterreactorrun95h,andtherecoveryafteraerationoxygen

8、ation-1-1took54h.Whilethemaximumvalueofnitritenitrogenwas0.112mg.Lafterreactorrun32hatDO=1.5mg.L,andtherecoveryafteraerationoxygena