title: Enhancement of styrene removal by Pseudomonas sp. SR-5 in mixed culture with a benzoic acid-degrading bacterium in biofilter.
abstract: The growth of a styrene-degrading bacterium, Pseudomonas sp. SR-5, was inhibited by benzoic acid (BA), one of the styrene degradation intermediates, in liquid culture. A benzoic acid-degrading microorganism, Raoultella sp. strain A, was isolated from a peat biofilter inoculated with a wastewater. The styrene removal efficiencies of the two laboratory-scale biofilters inoculated with only strain SR-5 and a mixed culture of strains SR-5 and A were compared using a mixed packing material of peat and ceramic (1:1) for 45 days. The biofilter with the mixed culture showed a higher removal efficiency than that with a single culture of SR-5. The maximum elimination capacities of the biofilters with the mixed culture and the single culture were 141 g m(-3)h(-1) and 106 g m(-3)h(-1), respectively. In the biofilter with the single culture, 136 g of benzoic acid (m3 of dry packing material)(-1) was accumulated at the end of the experiment. However, no accumulation of benzoic acid was observed in the biofilter with the mixed culture.
authors.affiliation: R-29 Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Iwanade
authors.forename: J H
authors.initials: JH
authors.lastname: Jang
authors.forename: M
authors.initials: M
authors.lastname: Hirai
authors.forename: M
authors.initials: M
authors.lastname: Shoda
mesh_terms: D000393:Air Pollutants / Q000378:metabolism*; D019817:Benzoic Acid / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D004755:Enterobacteriaceae / Q000378:metabolism; D005374:Filtration; D007709:Klebsiella / Q000378:metabolism; D011549:Pseudomonas / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D012987:Soil; D012988:Soil Microbiology; D020058:Styrene / Q000378:metabolism*
chemical_list: D000393:Air Pollutants; D012987:Soil; D020058:Styrene; D019817:Benzoic Acid