生物滴滤法净化间歇释放印刷覆膜废气  

Performance of an Intermittently Loaded Bio-trickling Filter for Treating Organic Waste Vapors from Printing and Coating Facilities

作　　者：华素兰[1] 王丽萍[1] 周敏[2] 朱玉丽[1] 吴晓[1] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]中国矿业大学化工学院,江苏徐州221116

出　　处：《中国矿业大学学报》2008年第1期79-83,共5页Journal of China University of Mining & Technology

基　　金：江苏省自然科学基金项目(BK2004031);江苏省高校研究生科技创新计划项目(2006)

摘　　要：研究了生物滴滤法（Ф300×2000mm）净化间歇释放印刷覆膜废气的性能及其降解机理，系统采用甲苯专性降解菌株P．putida接种，循环式“气-液相同步驯化挂膜”方法启动，“诱导物目标污染物”递进式驯化，考察了两种间歇运行方式下，生物滴滤器对印刷覆膜有机废气的净化性能．结果表明：当生物滴滤器采用白天运行、夜间停运的运行模式，空床停留时间（EBRT）30．3s，总挥发性有机物（TVOC）入口的质量浓度为550～750mg／m^3时，TVOC平均去除率保持在85％以上，甲苯去除效率在95％以上，乙酸乙酯去除效率稳定在80％～90％；采用双休日停运2d的运行模式，去除效率经过2d的恢复期后达到稳定．甲苯耗氧降解封闭系统试验表明，停止有机废气基质供应时，生物降解积累的中间产物邻苯二酚、苯甲醇等继续氧化可转化为生物量，维持系统的稳定性．The performance and degradation mechanism of a pilot-scale bio-trickling filter （Ф 300 × 2 000 mm） for treating organic waste vapors produced from printing and coating facilities was investigated under two different intermittent loading conditions. The bio-filter was started by adding P. putida consortium using a ＂gas-liquid phase joint inoculation＂ method and an ＂inducer-target graded acclimation＂ method. The results show that the bio-filter is effective for treating organic waste vapors during the daytime operating period. When the inlet gas concentration is in the range of 550-750 mg/m^3 the empty bed residence time （EBRT） is 30.3 s and the elimination efficiency of TVOC, toluene and ethyl acetate are greater than 85%, 95% and 80%, respectively. Two days of contaminant loading after the weekend shutdown period were required to regain the full elimination capacity. A closed-system batch experiment on aerobic toluene degradation showed that there are several intermediates, ：such as catechol and benzyl alcohol, that accumulate during bio-degradation. The good performance is demonstrably due to the oxidation of intermediates linked to biomass synthesis during shutdown periods.

关 键 词：生物滴滤器 甲苯 乙酸乙酯 间歇释放 中间产物 

分 类 号：X701[环境科学与工程—环境工程]