反硝化细菌
亚硝酸盐
硝酸盐
甲烷厌氧氧化
细菌
生物
古细菌
微生物
无氧运动
反硝化
微生物学
环境化学
食品科学
甲烷
化学
生态学
氮气
生理学
有机化学
遗传学
作者
Shihu Hu,Raymond Jianxiong Zeng,Jürg Keller,Paul Lant,Zhiguo Yuan
标识
DOI:10.1111/j.1758-2229.2010.00227.x
摘要
Summary Two cultures were inoculated with sludges taken from a parent culture containing archaea distantly related to anaerobic methanotrophic archaea (ANME) and bacteria related to Candidatus Methylomirabilis oxyfera, both of which have previously been found in cultures performing denitrifying anaerobic methane oxidation process. The cultures were fed with nitrate and nitrite, respectively, along with methane. The nitrate‐fed culture, Culture B, showed a stable microbial community composition and denitrifying anaerobic methane oxidation activity. In contrast, the nitrite‐fed culture, Culture A, achieved a substantial increase in the nitrite consumption rate, from 1.1 to 7.3 mmol NO 2 ‐ ‐N (g VSS) −1 day −1 in 90 days. Concurrent with this activity increase, the archaeal population in Culture A decreased with time, and became undetectable after 100 days, while bacteria related to M. oxyfera increasingly dominated the culture. This observation suggests that the bacteria related to M. oxyfera are more competitive for nitrite reduction compared with the archaea related to ANME. This study showed that nitrate or nitrite feeding has a significant impact on the ecology and activities of microorganisms in the denitrifying anaerobic methane oxidation process. This study also revealed that nitrite overloading may have a toxic effect on the bacteria related to M. oxyfera .
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