Characteristics of Ammonium Removal by Heterotrophic Nitrification-Aerobic Denitrification by Alcaligenes faecalis No.4(ENVIRONMENTAL BIOTECHNOLOGY)

概要

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Alcaligenes faecalis no.4 has heterotrophic nitrification and aerobic denitrification abilities. By taking the nitrogen balance under different culture conditions, 40-50% of removed NH_4^+-N was denitrified and about one-half of removed NH_4^+-N was converted to intracellular nitrogen. The maximum ammonium removal rate of no.4 (28.9mg-N/l/h) and its denitrification rate at highstrength NH_4^+-N of about 1200ppm 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.
社団法人日本生物工学会の論文
2005-08-25