生物滴滤器净化甲苯废气研究

为探索气态挥发性有机污染物（ＶＯＣｓ）高负荷生物滴滤器（ＢＴＦ）处理的可能性，采用筛选出的纤维附着活性载体材料，用经以甲苯为唯一碳源驯化而得的微生物菌种，进行了甲苯废气的净化实验。结果表明：采用ＡＣＯＦ的ＢＴＦ最大消除能力值可达２８０ｇ／ｍ＾２．ｈ。在甲七小于２８０ｇ／ｍ＾３．ｈ，停留时间１５．７ｓ的条件下，表观气速２３０ｍ／ｈ时间可保持９０％以上的净化效率。闲置恢复实验表明：数地的停运闲置对设备

Study on Purification of Gaseous Toluene with Biotrickling Filter

Based on the media evaluation result, a biotrickling filter packed with ACOF (Activated Carbon on Fiber) was used to remove toluene from a waste gas stream. The experimental results showed that the maximum elimination capacity (EC) of the biotrickling filter for toluene could reach 280g/m3.h. The performance of the BTF was good for lower concentration hydrophobic toluene stream at higher superficial velocity. When superficial velocity was 230m/h and the empty bed retention time (EBRT) was 15.7s, the toluene gas stream of 280g/m3.h loading could achieve 90% removal efficiency. The non-use experimental results showed that short time (8 ~ 12h) non-use had no or very little effect on the BTF removal efficiency. 2 days scale non-use caused some adversary effect on the BTF performance, and needed 1 - 3h to regain the initial performance. Long time non-use (more than 20 days) caused obvious damage of the performance. In this situation, the biotrickling filter needed 3 days to get recovery. General speaking, the biotrickling filter packed with ACOF has the advantage of high removal efficiency and good buffer and maintain capacity.