Liu Yonghui, Quan Xie, Sun Yumei, Chen Jingwen, Xue Daming, Chung Jong Shik
School of Environmental Science and Technology, Dalian University of Technology, Zhongshan Road 158-129, Dalian 116012, PR China.
J Hazard Mater. 2002 Nov 11;95(1-2):199-213. doi: 10.1016/s0304-3894(02)00139-5.
Biofitration was successfully applied to treat air streams containing a mixture of ethyl acetate and toluene. The experiment was performed by two identical bench-scale biofilters, which were acclimated by ethyl acetate and toluene, respectively. During a 3 month steady-state performance, the two biofilters showed equivalent elimination capacity (EC) for toluene (50 g/m(3) bed/h of pure toluene). However, the biofilter acclimated with ethyl acetate showed a much higher EC for ethyl acetate (400 g/m(3) bed/h of pure ethyl acetate) than that acclimated with toluene (250 g/m(3) bed/h). The concurrent biofiltration of toluene was inhibited by the presence of ethyl acetate. The results also showed that more nitrogen and phosphorus were consumed in the process of the biofiltration of toluene compared with the treatment of ethyl acetate. After the 3 month experiment, the pH of the media treating ethyl acetate dropped from 6.71 to 5.50, whereas the pH of the media treating toluene increased from 6.71 to 7.08.
生物过滤已成功应用于处理含有乙酸乙酯和甲苯混合物的气流。实验由两个相同的实验室规模生物滤池进行，分别用乙酸乙酯和甲苯进行驯化。在3个月的稳态运行期间，两个生物滤池对甲苯的去除能力（EC）相当（纯甲苯为50 g/m³滤床/小时）。然而，用乙酸乙酯驯化的生物滤池对乙酸乙酯的EC（纯乙酸乙酯为400 g/m³滤床/小时）比对甲苯驯化的生物滤池（250 g/m³滤床/小时）高得多。乙酸乙酯的存在抑制了甲苯的同时生物过滤。结果还表明，与乙酸乙酯处理相比，甲苯生物过滤过程中消耗了更多的氮和磷。3个月的实验后，处理乙酸乙酯的滤料pH从6.71降至5.50，而处理甲苯的滤料pH从6.71升至7.08。
