Journal
BIOTECHNOLOGY LETTERS
Volume 27, Issue 11, Pages 773-778Publisher
SPRINGER
DOI: 10.1007/s10529-005-5634-9
Keywords
aerobic denitrification; Alcaligenes faecalis; heterotrophic nitrification; high-strength of ammonium
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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 N-2 was confirmed by GC-MS and 90% of denitrified products was N-2. 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.
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