有氧条件下生物滤塔去除NOx的挂膜启动及研究  

Start-up and Affecting Factors of Biofilter for Treatment of NO_x Under Aerobic Conditions

作　　者：李慧颖[1,2] 黄少斌[1] 卢乐[1] 王瑞敏[1] 黄慧星[1] 

机构地区：[1]华南理工大学环境科学与工程学院,工业聚焦区污染控制与生态修复教育部重点实验室,污染控制与生态修复广东省普通高等学校重点实验室,广州510006 [2]湖南工学院安全与环境工程系,衡阳421002

出　　处：《环境科学》2011年第7期1881-1887,共7页Environmental Science

基　　金：广东省科技厅科技计划项目(2009B050900005);国家自然科学基金项目(20777019);湖南工学院科研项目(HY10005)

摘　　要：将优选后的好氧反硝化菌应用于生物过滤系统,用来脱除NOx模拟废气,研究了生物滤床在好氧条件下对NOx的处理效果和不同操作条件下的运行情况,并对NOx去除过程的作用机制进行了探讨.结果表明,生物滤塔经过26 d完成挂膜启动,该工艺系统能有效克服氧对反硝化菌活性的抑制作用,可实现对NOx的高效率脱除.NOx净化主要发生在滤塔中、下层,在O2体积分数为10%、NOx进气浓度为286.4 mg/m3、EBRT为59 s时,NOx净化效率能够达到93.6%.在生物过滤系统中形成了特有的硝化菌、兼性反硝化菌和好氧反硝化菌生物膜体系.An optimized aerobic denitrifying bacteria was applied to a biofilter for the removal of NOx.The removal process of NOx was investigated,and the relationship between environmental factors and NOx removal efficiency as well as the NOx transfermechanism under aerobic conditions are discussed.The results show that the biofilter finished start-up after 26 days and the presence of oxygen has no evident negative effect on the efficiency of NOx removal.Mainly happening at the middle and under part of the biofiltration system,the removal of NOx get a high efficiency of 93.6% at the EBRT of 59s and the inlet NO x concentration of 286.4 mg/m^3 with 10% O2.A special biomembrane system was formulated by nitrobacteria,facultative denitrifying bacteria and aerobic denitrifying bacteria in the biofiltration system.

关 键 词：生物法废气净化技术 好氧反硝化 硝化 生物过滤 氮氧化物 

分 类 号：X511[环境科学与工程—环境工程]