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Effect of trace elements on the development of co-cultured nitrite-dependent anaerobic methane oxidation and methanogenic bacteria consortium

Author:
Jiang, Liping, Hu, Zhen, Wang, Yinan, Ru, Dongyun, Li, Jianwei, Fan, Jinlin
Source:
Bioresource technology 2018 v.268 pp. 190-196
ISSN:
0960-8524
Subject:
bacteria, coculture, copper, genes, iron, methane, methane production, methanogens, microbial communities, molybdenum, oxidation
Abstract:
The aim of this work was to study the effects of key trace elements (i.e., iron, copper and molybdenum) on the development of co-cultured n-damo and methanogenic bacteria consortium, which could realize in situ CH4 production and utilization. The results showed that rational dosage, which was 50 mg/L of Fe, 1 mg/L of Cu and 5 mg/L of Mo, significantly stimulated the removal of NO2−. However, the activity of microbes was noticeably inhibited at 5 mg/L of Cu and 1 mg/L of Mo. Microbial community analysis indicated that the abundances of n-damo bacteria and methanogens showed a positive response to the rational dosage. Furthermore, the expression of key functional genes was enhanced under the rational dosage condition.
Agid:
6121130