Mechanisms of nitrogen transformation driven by functional microbes during thermophilic fermentation in an ex situ fermentation system

文献类型： 外文期刊

第一作者： Zhou, Sihan

作者： Zhou, Sihan;Li, Zhanbiao;Qiao, Rongye;Li, Mengjie;Chen, Yifan;Guo, Hui;Song, Zhen;Guo, Hui;Guo, Hui

作者机构：

关键词： Ex situ fermentation system; Metagenomics; Nitrogen metabolism; Functional microbes; Key genes

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.889； 五年影响因子：11.139 ）

ISSN： 0960-8524

年卷期： 2022 年 350 卷

页码：

收录情况： SCI

摘要： In this study, we explored the pathways and mechanisms of nitrogen (N) transformation driven by functional microbes carrying key genes in an ex situ fermentation system (EFS). Temperature and N content were found to be the most important factors driving variation in bacterial and fungal communities, respectively; Bacillus became the most abundant bacteria and Batrachochytrium became the most abundant fungi. Co-occurrence network analysis showed that some bacteria including Halomonas, Truepera, and Gemmatimonas species carry genes that promote mineralization, nitrification, dissimilatory/assimilatory nitrate reduction, denitrification, anammox reactions, and N fixation. The maximum rate of total mineralization reached 136.60 mu g N g(-1) d(-1). Functional microbes promoted various N conversion processes at different rates in the EFS, with levels increasing by at least 0.23 mu g N g(-1) d(-1). These results provide a theoretical basis for feasible optimization measures to address N loss during fermentation.

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