Chen Jianmeng, Wang Jiade, Zhuang Li, Bie Jiyan
College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
Huan Jing Ke Xue. 2002 Jul;23(4):8-12.
An experimental investigation on purification of dichloromethane waste gas was conducted in a 50 mm diameter biotrickling filter packed with randomly-stacked polypropylene. A heterotrophic population was acclimated from facility's secondary sludge, and was further inoculated over the surface of the packing. The inoculation process lasted about 30 days, and then a biofilm was developed. The counter-current operation was carried out in the filter. The pH and temperature of the circulating liquid were controlled as 7.0 +/- 0.5 and 28.5 +/- 2 degrees C respectively. The biofilm system was well accommodative to the fluctuation of operating conditions. When the concentration of dichloromethane was in the range of 0.7 to 3.12 g/m3, and the gas empty-bed residence time was 15.7 s, the removal efficiency of 72.0 to 99.1% could be achieved. It was also showed that the acid environment in the filter could refrain the degradation of dichloromethane.
在一个直径50毫米、填充有随机堆叠聚丙烯的生物滴滤池中，对二氯甲烷废气的净化进行了实验研究。从工厂的二级污泥中驯化出异养菌群，并将其进一步接种到填料表面。接种过程持续约30天，然后形成了生物膜。在滤池中进行逆流操作。循环液的pH值和温度分别控制在7.0±0.5和28.5±2℃。生物膜系统对操作条件的波动具有良好的适应性。当二氯甲烷浓度在0.7至3.12克/立方米范围内，气体空床停留时间为15.7秒时，去除效率可达72.0%至99.1%。研究还表明，滤池中的酸性环境可抑制二氯甲烷的降解。
