生物滴滤塔反硝化净化NO废气的启动  

Study on start-up of biotrickling filter for nitric oxide denitrification.

作　　者：倪建国[1] 吴成强[1] 朱润晔[1] 陈建孟[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《中国环境科学》2008年第5期444-448,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(20776134);浙江省自然科学基金资助项目(Y505308;X506311)

摘　　要：采用低浓度NO废气作为气相氮源、硝酸钠作为液相氮源,在序批式活性污泥法反应器(SBR)中的NO反硝化菌驯化成熟的基础上,研究了生物滴滤塔的启动过程.结果表明,在室温、NO进气浓度(160mg/m3)、停留时间(EBRT)113s的条件下,接种驯化成熟种污泥的生物滴滤塔在9d内完成挂膜.硝酸盐是影响驯化过程中NO净化效果和N2O产生量的重要因素,添加适量硝酸盐有助于NO反硝化菌的正常生长,提高NO净化效率;但硝酸盐过多时会导致中间产物N2O的累积.在滴滤塔挂膜启动期间,循环液吸光度、填料层压力损失与NO净化效率呈正相关性,可作为衡量生物滴滤塔挂膜启动完成的重要指标.The start-up of biotrickling filter was studied with sodium nitrate and NO as the liquid-phase and gas-phase nitrogen sources, respectively, after NO denitrifying bacteria was acclimated in the Sequence Batch Reactor （SBR）. The biofilm in the biotrickling filter became mature within 9d at room temperature with the NO inlet concentration of 160mg/m^3 and the empty bed residence time （EBRT） of 113s. Nitrate was a key factor influencing NO removal and the production of nitrous oxide （N2O）. Nitrate improved the growth of NO denitrifying bacteria and increased NO removal. Overuse of nitrate resulted in the accumulation of N2O. Absorbance of circulation liquid and pressure drop were positively correlated with NO removal efficiency. The two parameters can thus be used as the key elements to evaluate the start-up and completion of biotrickling filter.

关 键 词：NO N2O 生物滴滤塔 反硝化 启动 

分 类 号：X701[环境科学与工程—环境工程]