放大型生物滴滤床净化甲苯/苯废气的研究

Treatment of toluene/benzene waste gas in an amplified biotrickling filter

采用处理甲苯废气的放大型生物滴滤床处理苯及苯/甲苯混合废气的实验,考察苯的净化效率,不同床层降解苯的能力,放大型生物滴滤床的短期停置、甲苯/苯混合废气间降解关系以及不同床层微生物的群落结构。结果表明,当气体流量为8m^3/h,苯浓度低于0.4g/m^3时,苯净化效率高于80%。第一床层降解苯的效率占总床层的90%以上。放大型生物滴滤床的短期停置,1,2和4d对净化性能没有严重影响。甲苯浓度为0.3g/m^3时,对苯的净化性能有一定抑制作用,苯的净化效率最终稳定在70%左右,火山岩填料上活性微生物的种类较多。

In this study,an amplified biotrickling filter （BTF）that had been used to treat toluene previously was established to treat waste gas containing benzene or benzene/toluene.The benzene purification efficiency,ben-zene degradation ability of different bed,the short-term stagnation,the degradation relation of benzene/toluene waste gas and microbial commumity structure were examined.Results reveals that the benzene purification effi-ciency was above 80% when the gas flow rate was 8 m^3/h and benzene was below 0.4 g/m^3 ,the benzene degra-dation efficiency of the first bed was more than 90% of total bed degradation efficiency.There was no damage effect on the performance of BTF even though the BTF had been stagnated for 1,2,or 4 d.when the toluene concentration was 0.3 g/m^3 ,a certain inhibiting effect could be examined to benzene.The benzene purification efficiency was maintain 70% eventually,more microorganism species were examined in the surface of volcanic rock.