title: Nitrification and denitrification in high-strength ammonium by Alcaligenes faecalis.
abstract: Alcaligenes faecalis sp. No. 4, that has the ability of heterotrophic nitrification and aerobic denitrification in high-strength ammonium at about 1200 mg-N/l, converted about one-half of removed NH4+-N to intracellular nitrogen and nitrified only 3% of the removed NH4+. From the nitrogen balance, 40-50% of removed NH4+-N was estimated to be denitrified. Production of N2 was confirmed by GC-MS and 90% of denitrified products was N2. The maximum ammonium removal rate, 29 mg-N/l h and its denitrification rate in aerated batch experiments, were 5-40 times higher than those of other bacteria with the same ability.
authors.affiliation: Chemical Resources Laboratory, Tokyo Institute of Technology, Midori-ku, 226-8503, Yokohama, 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 / Q000254:growth & development / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology; D019811:Hydroxylamine / Q000378:metabolism; D009566:Nitrates / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D013997:Time Factors
chemical_list: D009566:Nitrates; D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D019811:Hydroxylamine