摘要
在5 0mm生物滴滤池内进行了二氯甲烷废气净化的实验研究 .由工厂活性污泥经驯化培养得到菌种 ,进一步接种、在填料表面挂膜 ,接种和挂膜约需 3 0d .滴滤池内装填聚丙烯散堆填料 ,废气和循环液在滴滤池内逆流操作 ,循环液 pH值为 7 0± 0 5 ,温度维持在 2 8 5± 2℃的条件下 ,生物膜系统能较好地适应进口浓度的变化 .在气体空床停留时间为 1 5 7s、二氯甲烷进口浓度为 0 7～ 3 1 2 g/m3的范围内 ,去除效率为 72 0 %～ 99 1 % .
An experimental investigation on purification of dichloromethane waste gas was conducted in a 50mm 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℃ respectively. The biofilm system was well accommodative to the fluctuation of operating conditions. When the concentration of dichloromethane was in the rang of 0 7 to 3 12g/m 3, and the gas empty bed residence time was 15 7s, 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.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第4期8-12,共5页
Environmental Science
基金
教育部高等学校骨干教师资助计划项目 (1819)
