title: Two kinds of ammonia-oxidizing bacteria isolated from biologically deodorizing plants in cold district.
abstract: Two kinds of ammonia-oxidizing bacteria isolated from biologically deodorizing plants in cold districts in Japan were identified as Nitrosomonas sp. IWT202 and Nitrosomonas sp. IWT514. The optimum pHs for growth were 8.0 (IWT202) and 7.5 (IWT514). Although rockwool samples for isolation were collected from the same plants, the optimum temperature for growth of strain IWT202 (37 degrees C) differed from that of strain IWT514 (30 degrees C). The bacteria had a higher (IWT202, 37 degrees C) and lower (IWT514, 20 degrees C) growth temperature than is usually the case. Both strains were shown to differ completely in regard to the effect of the ammonium sulfate concentration in the medium for a 20 degrees C culture and 30 degrees C culture. The inoculation of these bacteria provides the possibility of recovering ammonia-oxidizing activity, when the ammonia-oxidizing activity is lowered in biological deodorizing plants in cold districts. It seems that these strains are suitable for application to deodorization.
authors.affiliation: Department of Agricultural and Biological Chemistry, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Satoh
authors.forename: Rieko
authors.initials: R
authors.lastname: Takizawa
authors.forename: Michiharu
authors.initials: M
authors.lastname: Sarai
authors.forename: Naoto
authors.initials: N
authors.lastname: Sato
authors.forename: Reiji
authors.initials: R
authors.lastname: Takahashi
authors.forename: Tatsuaki
authors.initials: T
authors.lastname: Tokuyama