Conversion of ammonia to dinitrogen in wastewater by Nitrosomonas europaea

被引：6
|
作者：
Shrestha, NK
Hadano, S
Kamachi, T
Okura, I [1 ]
机构：
[1] Tokyo Inst Technol, Dept Bioengn, Midori Ku, Yokohama, Kanagawa 2268501, Japan
[2] Toshiba Plant Kensetsu, Environm & Agr Plant, Engn & Construct, Environm Syst Div,Ota Ku, Tokyo 1448721, Japan
来源：
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY | 2001年 / 90卷 / 03期
关键词：
denitrification; dinitrogen; nitrous oxide; nitrification; Nitrosomonas europaea;
D O I：
10.1385/ABAB:90:3:221
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Because Nitrosomonas europaea contains ammonia-oxidizing enzyme, nitrite reductase, and nitrous oxide reductase, the conversion of ammonia to dinitrogen was tried with different reaction conditions. In aerobic reaction conditions, ammonium was converted to nitrite (NO2-), while under oxygen-limiting or oxygen-free conditions, NO2-N formed from ammonia oxidation by N. europaea was reduced to N2O and dinitrogen with 22% conversion. During denitrification, optimal pH for the production of N2O and dinitrogen was found to be 7.0-8.0. Dinitrogen was not produced in acidic pH <7.0. A low partial oxygen pressure as well as oxygen-free conditions are favorable for high production of dinitrogen.
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页码：221 / 232
页数：12
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