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Removal of p-xylene with Pseudomonas sp. NBM21 in biofilter
Euisoon Jeong1, Mitsuyo Hirai, Makoto Shoda
1Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
Abstract:
As a p-xylene (p-Xyl)-degrading microorganism, Pseudomonas sp. NBM21 was isolated from an activated sludge of a wastewater treatment plant. NBM21 degraded p-Xyl, m-xylene, benzene and toluene, but not o-xylene, ethylbenzene (Eb) and styrene. NBM21 was inoculated to a biofilter with Biosol as a packing material and p-Xyl removal was operated for 105 d under sterile and nonsterile conditions. The maximum elimination capacities for p-Xyl at higher than 90% removal efficiency were 160 g/m3/h and 150 g/m3/h under nonsterile and sterile conditions, respectively. A high load of Eb adversely affected to the removal of xylene.
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