Jeong Euisoon, Hirai Mitsuyo, Shoda Makoto
Chemical Resources Laboratory, Tokyo Institute of Technology 4259, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
J Biosci Bioeng. 2009 Aug;108(2):136-41. doi: 10.1016/j.jbiosc.2009.03.024.
Xylene (a mixture of o-, m-, p-xylenes and ethylbenzene) gas removal was conducted in the a biofilter inoculated with a mixture of the m- and p-xylene-degraders, Pseudomonas sp. NBM21 and an o-xylene degrader, Rhodococcus sp. BTO62 under non-sterile conditions at 20 degrees C. Elimination capacities of o-, m-, and p-xylenes obtained were 180 g/m(3)/h at 20 degrees C and 100 g/m(3)/h at 10 degrees C, which were significantly higher than the 60-78 g/m(3)/h of previously reported biofilters, indicating that the two bacteria inoculated exhibited an almost total ability to remove xylene although only present in low numbers in the biofilter. In the sterile biofilter, carbon mass balance showed that 11.6% of the removed xylene was converted to cell mass. Among the xylene components, o-xylene was the most resistant to microbial degradation in spite of the low component ratio.
在接种了间二甲苯和对二甲苯降解菌（假单胞菌属NBM21）与邻二甲苯降解菌（红球菌属BTO62）混合菌的生物滤池中，于20℃非无菌条件下去除二甲苯（邻二甲苯、间二甲苯、对二甲苯和乙苯的混合物）气体。在20℃时，邻二甲苯、间二甲苯和对二甲苯的去除能力为180 g/m³/h，在10℃时为100 g/m³/h，这显著高于先前报道的生物滤池的60 - 78 g/m³/h，表明接种的这两种细菌尽管在生物滤池中数量较少，但几乎具备完全去除二甲苯的能力。在无菌生物滤池中，碳质量平衡表明，去除的二甲苯中有11.6%转化为细胞物质。在二甲苯各组分中，尽管邻二甲苯的含量比例较低，但它对微生物降解的抗性最强。
