Roles of micro-aeration on enhancing volatile fatty acids and lactic acid production from agricultural wastes

文献类型： 外文期刊

第一作者： Cao, Qitao

作者： Cao, Qitao;Zhang, Wanqin;Lian, Tianjing;Wang, Shunli;Yin, Fubin;Zhou, Tanlong;Zhang, Haiyan;Dong, Hongmin;Zhu, Jun

作者机构：

关键词： Lactic acid; Volatile fatty acids; Micro-aeration; Microbial Communities

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 347 卷

页码：

收录情况： SCI

摘要： Micro-aeration was proven to be an environmentally friendly strategy for efficiently enhancing volatile fatty acids (VFAs) and lactic acid (LA) production. The roles of micro-aeration on mono-digestion of swine manure (SM) for VFAs production and co-digestion of SM with corn silage (CS) for LA production were investigated, respectively. In this study, micro-aeration increased the maximum VFAs concentration by 20.3% to 35.71 g COD/ L, and shortened the time to reach the maximum from 18 days to 10 days. Micro-aeration limited the conversion of LA into VFAs, leading to LA accumulation effectively to be 26.08 g COD/L. Microbial community analysis suggested that Clostridium and Terrisporobacter were always the dominant bacteria with or without micro aeration for VFAs production, but the relative abundance increased notably during the same period. However, Bifidobacterium, which could use the higher productivity metabolism pathway, i.e., Bifidum pathway to produce LA, increased from lower than 1% to 22.9% by micro-aeration.

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