同步硝化反硝化处理氨氮废水过程中气态脱氮产物的研究  

Study on Gaseous Nitrogen Compounds Emitted during Ammoniac Wastewater SND Process

作　　者：汪苹[1] 王斌[1] 刘军[1] 

机构地区：[1]北京工商大学化学与环境工程学院,北京100037

出　　处：《环境科学研究》2005年第5期67-71,共5页Research of Environmental Sciences

基　　金：北京市自然科学基金资助项目;北京市教委科技发展计划重点项目(KZ200510011008)

摘　　要：采用密闭的间歇式反应器对高质量浓度氨氮废水在同步硝化反硝化(SND)生物脱氮过程中产生的3种氮氧化物气体(NO,NO2和N2O)进行跟踪测试.结果表明,在由反应器排出的气体中,ρ(NO2)不高于实验室背景值,在脱氮产物中可忽略不计,而ρ(NO)和ρ(N2O)要高于背景值10倍以上.对于该脱氮系统,在低ρ(DO)和高pH的条件下产生的N2O相对较少.ρ(DO)为1.5～3.0 mg/L时,以NO和N2O形式脱除的氮分别占脱氮总量的0.58%和6.53%;ρ(DO) 为2.5～4.0 mg/L时,分别为0.48%和39.34%.此外,还分析了可实施的N2O控逸途径.Three emitted gaseous nitrogen compounds were traced, when high strength ammonia containing wastewater was treated in a sealed intermittent reactor by Simultaneous Nitrification and Denitrification （SND） process. The emitted NO2 amount was less than background value of the laboratory. NO2 was therefore neglected. However, emitted NO and N2O were more than 10 times of the background. Less N2O was emitted under low DO and high pH condition. Under different DO mass concentration conditions, it was obtained by diagrammatic integral method that about 0.58% and 6.53% of total lost nitrogen was emitted as NO and N20, respectively（DO mass concentration is 1.5-3.0mg/L）, and 0.48% and 39.34 % of total lost nitrogen was emitted as NO and N2O, respectively （DO mass concentration is 2.5-4.0mg/L）. Moreover, the available means to control N2O emission was discussed

关 键 词：SND 脱氮 NO N2O NO2 

分 类 号：X511[环境科学与工程—环境工程] X703.1