静压箱式错流生物滴滤床去除甲苯废气的研究

Purification of toluene contained waste gas by static pressure tank cross-flow bio-trickling filter

根据静压箱原理设计静压箱式错流生物滴滤床,设置进气静压区进一步改善气流分布情况,气流进入后在圆柱形静压区内动压降低,气流均匀分布。以甲苯为目标污染物、陶粒为填料、恶臭假单胞菌为菌源进行实验,研究静压箱式错流生物滴滤床的挂膜启动情况及稳定运行阶段甲苯停留时间、进气浓度对甲苯去除率的影响,分析了运行后期填料层压力损失增大的原因,并提出解决办法。

The static pressure tank cross-flow bio-trickling filter was designed on the principle of static pressure tank.A static pressure area was designed near the inlet of filter to improve the airflow distribution uniformity.The dynamic pressure of gas dropped as it flowed into the static pressure area so the gas was even distributed in filter.The waste gas purification by static pressure tank cross-flow bio-trickling filter was performed with toluene as target pollutant,ceramsite as packing material and Pseudomonas putida as degrading bacteria.The stat-up process of the bio-trickling filter was studied;the effects of inlet toluene concentration and residence time on removal capacity under stable operation stage were investigated;the reason of pressure drop rising in the filter was analyzed and the solutions were provided.