有机废气的生化处理实验研究

A Approach to Purification of Waste Gases Contining Organic Compounds By Biochemical method

研究表明，采用国内现有微生物菌种挂膜接种的生物膜填料塔净化低浓度有机废气是可行的。初步实验研究结果显示，增加人口气体甲苯浓度和气体流量，同时减小循环液体喷淋量，可使甲苯的生化去除量增大，每升体积的生物膜填料对甲苯的生化去除量最大可达１５７．１３ｍｇ／ｈ。由实验结果推断，生物膜填料塔对废气中甲苯的净化去除过程属于传质控制过程，甲苯在生物膜内的降解为一级生化反应过程。

From the study, a fact can be affirmed that in China, it is feasible to purify the waste gas containing organic compunds in low concentration by using the biological trickling filter with biofilm packingmaterial, inoculated with a mixed culture from a biostation of treating wastewater in a coke-oven plant. The results of preliminary experiment show that with the increasing of the concentration of toluene in influent gas and gas flow,and decreasing of the flow of circulating liquid simultaneously, the biological elimination of toluene in influent gas can be increased, which can reach 157.13mg per hour per litre packing material with biofilm in the tower. From the experimental results, it can be inferred that the process of purifying the waste gas containing toluene in low concentration by using the biofilter is limited by mass transfer. And, the removal reaction of toluene in the biofilm is the firs order biochemical reacion