白腐真菌生物过滤塔处理氯苯气体的研究

以竹子为填料,构建新型的白腐真菌Phanerochaete chrysosporium生物过滤塔,考察该过滤塔在不同操作条件下对氯苯的去除性能.结果表明,白腐真菌生物过滤塔对氯苯表现出较好的去除效果,在进口浓度200～1 500 mg/m3,空塔停留时间122 s的条件下,最大去除率接近80%,平均去除率约50%.过滤塔的去除速率与进口负荷和去除率有关,在进口浓度500～1 500mg/m3,流量0.5 m3/h的条件下,最大去除速率可达94 g/(m3·h),平均去除速率为60 g/(m3·h).过滤塔去除速率对进口负荷变化的响应幅度与流量有关,在低流量条件下随进口负荷的变化率较大.过滤塔中氯苯浓度的沿程分布呈现出非线性下降的特征,造成这一现象的原因可能与过滤塔内生物量的分布情况有关.

White Rot Fungi Biofilter Treating Waste Gas Containing Chlorobenzene

A novel gas-solid phase bioreactor, using bamboo as support material, inoculated with white rot fungi Phanerochaete chrysosporium was established to treat waste gas containing chlorobenzene. The performance of P. chrysosporium bioreactor was examined under different conditions. Results showed that the maximum removal efficiency of nearly 80% (average removal efficiency of 50%) could be reached under the condition of chlorobenzene inlet concentration of 200-1500 mg/m3 and the empty bed retention time (EBRT) of 122 s. While the maximum chlorobenzene removal rate of 94 g/(m3 x h) average removal efficiency o f 60 g/(m3 x h)] had been achieved within chlorobenzene inlet concentration of 500- 1500 mg/m3 and at the flow rate of 0.5 m3/h. Furthermore, the removal rates of the bioreactor at different flow rates were also examined, suggesting that the response of removal rate to the change of inlet loading was dependent on the flow rate. Lower flow rate could promote the extent of removal rate enhancement compared to the higher flow rate. Moreover, the profile of chlorobenzene concentration along the height of the biofilter showed a nonlinear decrease trend.