Biodrying of biogas residue through a thermophilic bacterial agent inoculation: Insights into dewatering contribution and microbial mechanism

文献类型： 外文期刊

第一作者： Xu, Mingyue

作者： Xu, Mingyue;Sun, Haishu;Yang, Min;Xie, Dong;Meng, Jie;Wang, Qunhui;Wu, Chuanfu;Sun, Xiaohong;Wang, Qunhui;Wu, Chuanfu

作者机构：

关键词： Biogas residue; Biodrying; Thermophilic bacterial agent; Dewatering contribution; Microbial community

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 355 卷

页码：

收录情况： SCI

摘要： Biogas residue (BR) is difficult to transport and compost due to its high moisture content. The purpose of this study was to elucidate the dewatering and microbial mechanisms underlying the inoculation of a thermophilic bacterial agent (TBA) onto BR with a high moisture content (i.e., 90.4%). TBA accounted for 78.7% of the water loss rate in BR, dramatically higher than the effects of aeration, external heat, or indigenous microorganisms (i.e., 1.8%, 0.1%, and 19.4%, respectively). Furthermore, TBA inoculation resulted in a stable product [with a low moisture content (9.4%) and a high seed germination index (107.3%)]. Finally, TBA increased microbial diversity and the abundance of functional bacteria (Proteobacteria and Bacteroidota), which might be beneficial for refractory organic compound decomposition and plant growth. Thus, biodrying BR via inoculation with a TBA is recommended economically.

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