低DO下的短程硝化及同步硝化反硝化_张小玲

低DO下的短程硝化及同步硝化反硝化_张小玲低DO下的短程硝化及同步硝化反硝化张小玲,李斌,杨永哲,王磊,王志盈(西安建筑科技大学环境与市政工程学院,陕西西安710055)摘要:研究了低溶解氧下序批式反应器(SBR)的短程硝化特征和控制条件以及碳源浓度、投加方式对同步脱氮效率的影响。试验结果表明,保持高、低溶解氧交替的环境是实现短程硝化的关键;当进水NH+4-N为300mg/L、COD为400～600mg/L时,采用半连续碳源投加方式可保证总同步脱氮效率达到80%。关键词:序批式反应器;短程硝化;同步硝化反硝化;低溶解氧中图分类号:X703.1文献标识码:A文章编号:1000-4602(2004)05-0013-04Short-cutNitrificationandSimultaneousNitrificationandDenitrificationinSBRatLowDOZHANGXiao-ling,LIBin,YANGYong-zhe,WANGLei,WANGZhi-ying(SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitectureandTech-nology,Xi'an710055,China)Abstract:Studywasmadeonthecharacteristicsandcontrolconditionofshort-cutnitrificationinSBRatlowDO,andtheeffectofcarbonsourceconcentrationanddosingmodeonefficiencyofsi-multaneousdenitrification.TheresultsshowedthattomaintainenvironmentinwhichhighandlowDOoccuralternatelyisthekeytoachievingshort-cutnitrification.WhenNH+4-Nis300mg/LandCOD400～600mg/Lininfluent,useofsemi-continuousdosingofcarbonsourcecanguaranteesi-multaneousdenitrificationefficiency