数字农科院2.0

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

文献类型： 外文期刊

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

作者机构：

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

期刊名称： Bioresource Technology

ISSN： 0960-8524

年卷期： 2025 年 419 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： A short heat treatment (HT, 90 °C–100 °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·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·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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