Microbial mechanism for improving biogas production performance from boiling acidified pig manure feedstock

文献类型： 外文期刊

第一作者： Wang, Ming

作者： Wang, Ming;Liu, Kai;Li, Yunting;Peng, Hao;Wang, Qingjie;Wang, Manman;Wang, Ming;Li, Qichen;Li, Wenzhe

作者机构：

关键词： Two-phase anaerobic digestion; Pretreatment; Organic loading; Microbial diversity; Metabolic pathway

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.0； 五年影响因子：9.5 ）

ISSN： 0960-8524

年卷期： 2025 年 419 卷

页码：

收录情况： SCI

摘要： A short heat treatment (HT, 90 degrees C-100 degrees C, 5 min) was applied to two-phase anaerobic digestion (TPAD) of pig manure (PM) to investigate its effect on microbial inactivation in the acidified feedstock during the methanogenic phase. The results showed that no differences in biogas production at organic loading rate (OLR) below 4.28 g volatile solid (VS)/(L center dot d). However, as the organic load increased, the TPAD with HT exhibited greater biogas production and volatile organic acids removal than the control. By stabilizing pH, digestion of HT acidified feedstock at 9.56 g VS/(L center dot d) OLR resulted in a biogas yield of 340.1 mL/g VS, exceeding the control by 35.6 %. HT enriched syntrophic bacteria, Methanothrix and Methanobacterium methanogens, and one-carbon metabolizing genes in the methanogenic phase, enhancing energy storage and conversion. Accordingly, acidification followed by HT could be a potential method to improve microbial community and load tolerance in methanogenic phase of TPAD.

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