期刊
BIORESOURCE TECHNOLOGY
卷 386, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2023.129538
关键词
Anaerobic digestion; Anaerobic microbiome; Anaerobic metabolic enzymes; Ammonia toxicity; Inhibition thresholds
Anaerobic co-digestion is a strategy for increasing methane production, but substrates rich in proteins and lipids can cause a synergetic co-inhibition effect. This study explored the microbial mechanisms behind the co-inhibition effect and found that ammonia played a major role in affecting methanogens. Decreased abundances of certain microorganisms and critical enzymes confirmed the synergetic co-inhibition effect.
Anaerobic co-digestion is an established strategy for increasing methane production of substrates. However, substrates rich in proteins and lipids could cause a long chain fatty acids (LCFA)-ammonia synergetic coinhibition effect. The microbial mechanisms of this co-inhibition are still unclear. The current study explored the effect of the synergetic co-inhibition on microbial community changes and prediction of metabolic enzymes to reveal the microbial mechanisms of the co-inhibition effect. The results indicated that during the synergetic co-inhibition, methanogens were mainly affected by ammonia. Decreased relative abundances of Petrimonas (82%) and Paraclostridium (67%) showed that ammonia inhibition contributed to the suppression of LCFA & beta;-oxidation under the synergetic co-inhibition conditions. The accumulation of more LCFA could further suppress microorganisms' activities involved in several steps of anaerobic digestion. Finally, decrease of critical enzymes' abundances confirmed the synergetic co-inhibition effect. Overall, the current study provides novel insights for the alleviation of synergetic co-inhibition during anaerobic digestion.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据