Two bioreactors, suspended-growth bioreactors (SPB) and biofilter (BF), were compared for the performances in removing gaseous o-xylene. Their efficiencies were investigated by varying the o-xylene loadings, gas flow rates, and gas-water ratios. High-throughput techniques were applied for the microbial populations assay. The conversion rate of carbon in o-xylene was calculated, and the relationship between biomass and removal efficiencies was also analyzed. Results indicated that both the SPB and BF could effectively treat gases containing o-xylene. The average removal efficiencies were 91.8% and 93.5%, respectively. The elimination capacity of the BF was much higher than that of the SPB when the intake load was below 150 g m^-3 h^-1. When the o-xylene loadings were over 150 g m^-3 h^-1, both the SPB and BF achieved similar o-xylene removal rates. The maximum elimination capacities were 28.36 g m^-3 h^-1 for the SPB and 30.67 g m^-3 h^-1 for BF. The SPB was more sensitive to the changes in the gas flow rate. Results of microbial assay indicated that bacteria e.g. Mycobacterium sp. and Rhodanobacter sp. might play important roles in removing o-xylene in the SPB, while the bacteria Pseudomonas sp., Sphingomonas sp., and Defluviicoccus sp., and the fungi Aspergillus sp. and Scedosporium sp., were the o-xylene degraders in the BF. The successful application of the integrated bioreactor in treating gases containing o-xylene exhausted from the electroplating plant indicated that the integration of SPB and BF could be an effective method for removing VOCs with Henry coefficient in the range of 0.01-1.

比较了两种生物反应器，即悬浮生长生物反应器（SPB）和生物过滤器（BF）去除气态邻二甲苯的性能。通过改变邻二甲苯负载量，气体流速和气水比来研究它们的效率。高通量技术应用于微生物种群测定。计算了邻二甲苯中碳的转化率，并分析了生物量与去除效率之间的关系。结果表明，SPB和BF均可有效处理含邻二甲苯的气体。平均去除效率分别为91.8％和93.5％。当进气负荷低于150 gm时，高炉的消除能力远高于SPB。^-3小时^-1。当邻二甲苯负载量超过150 gm ^-3 h ^-1时，SPB和BF均达到相似的邻二甲苯去除率。最大容量消除了28.36克^-3 ^ h ^-1为SPB和30.67克^-3 ^ h ^-1高炉。SPB对气体流速的变化更为敏感。微生物测定的结果表明细菌如分枝杆菌属。和Rhodanobacter sp。可能在去除SPB中的邻二甲苯中起重要作用，而细菌假单胞菌（Pseudomonas sp。），鞘氨醇单胞菌（Sphingomonas sp。）和地氟球菌（Defluviicoccus sp。和真菌曲霉菌。和Scedosporium sp。是高炉中的邻二甲苯降解物。集成生物反应器在处理电镀厂排放的含邻二甲苯的气体中的成功应用表明，SPB和BF的集成可能是去除亨利系数在0.01-1范围内的VOC的有效方法。