Abstract: The equipment and its operating characteristics of purifying waste gas containing low concentration toluene by using biological method were investigated.The results showed that the purification performance of a packing column with biofilm-material packing was better than that with sieve-plate column and bubble column.When the biofilm-packing column was operated countercurrently under the conditions of liquid/gas ratio of 0.03～0.1 and gas velocity（30～60）m·h~-1，more than 90％ of toluene in the waste gas could be removed.It was confirmed in the experiments that the biofilm-packing column also could remove toluenes homologues from the waste gas.It was found that the biofilm-packing column showed good capability for removing toluene and other organic compounds from waste gases,exhausted by some industrial processes,such as regeneration of rubber,printing process,treatment of casting and paint production.

摘要： 对生物法净化低浓度甲苯废气的适宜装置及其操作特性的研究表明，生物膜填料塔对低浓度甲苯废气的净化性能优于筛板塔及鼓泡塔；生物膜填料塔采用逆流并在液气比0.03～0.1、气速（30～60）m·h~(-1)的条件下操作时，低浓度甲苯废气净化效率可保持在90％以上．经实验验证，本生物膜填料塔对废气中甲苯的同系物同样具有净化作用．并且对再生胶厂、印刷厂、铸造厂、油漆厂等企业的实际生产废气也有良好的净化效果．