生物法处理苯、甲苯废气的工艺性能及动力学研究

研究了生物滴滤塔处理低质量浓度苯、甲苯混合废气的工艺性能及动力学模型拟合效果。在进气量600 L/h,循环液喷淋量20 L/h的操作条件下,生物滴滤塔对低质量浓度苯、甲苯混合气体有很好的去除效果,苯的去除率在65%左右,甲苯的去除率在93%左右。从生物反应器中分离筛选出1株能够降解苯、甲苯污染物的高效菌L4,通过Sherlock脂肪酸鉴定系统分析,匹配值SI为0.884,基本确定该菌株属于Bacillus.sp。采用吸附-生物膜理论进行动力学分析,与实验数据相比有良好的相关性,相关系数苯R2=0.999 5、甲苯R2=0.999 6。

Process performance and kinetics of benzene and toluene waste-gas treatment by biological method

The biological elimination capacity of low mass concentration benzene and toluene waste-gas by biotrickling filter and the kinetic model were researched.The results show that under the operation condition of the influent gas flowrate 600 L/h and the spraying quantity of circulation fluid 20 L/h,the biotrickling filter can get a good removal effect to mixed gas consisting of benzene and toluene: the removal efficiency of benzene is about 65%,toluene about 93%.A kind of high-efficiency bacteria L4 was screened out from the biotrickling filter.With the aid of Sherlock fatty acid profiling by gas chromatography,SI was determined as 0.884,bacteria L4 belongs to Bacillus.sp.The bioprocess has a higher relativity with the kinetic model of adsorption-biomembrane.The correlative coefficient of benzene R2=0.999 5,the correlative coefficient of toluene R2=0.999 6.