title: Characteristics of ammonium removal by heterotrophic nitrification-aerobic denitrification by Alcaligenes faecalis No. 4.
abstract: Alcaligenes faecalis no. 4 has heterotrophic nitrification and aerobic denitrification abilities. By taking the nitrogen balance under different culture conditions, 40-50% of removed NH4+-N was denitrified and about one-half of removed NH4+-N was converted to intracellular nitrogen. The maximum ammonium removal rate of no. 4 (28.9 mg-N/l/h) and its denitrification rate at high-strength NH4+-N of about 1200 ppm in aerated batch experiments at a C/N ratio of 10 were 5-40 times higher than those of other bacteria with the same ability. Only a few percent of the removed ammonium was converted to nitrite, and the main denitrification process was speculated to be via hydroxylamine which was produced by ammonium oxidation.
authors.affiliation: Chemical Resources Laboratory, Tokyo Institute of Technology, R1-29-4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
authors.forename: Hung-Soo
authors.initials: HS
authors.lastname: Joo
authors.forename: Mitsuyo
authors.initials: M
authors.lastname: Hirai
authors.forename: Makoto
authors.initials: M
authors.lastname: Shoda
mesh_terms: D000332:Aerobiosis; D042481:Alcaligenes faecalis / Q000378:metabolism*; D009584:Nitrogen; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*
chemical_list: D000644:Quaternary Ammonium Compounds; D009584:Nitrogen