Microbial mechanism for improving biogas production performance from boiling acidified pig manure feedstock
文献类型： 外文期刊
作者： Wang, Ming 1 ; Liu, Kai 1 ; Li, Qichen 3 ; Li, Yunting 1 ; Peng, Hao 1 ; Wang, Qingjie 1 ; Wang, Manman 1 ; Li, Wenzhe 4 ;
作者机构： 1.Northeast Agr Univ, Coll Engn, 600 Changjiang St, Harbin 150030, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Swine Facil Engn, Harbin 150030, Peoples R China
3.Chinese Acad Agr Sci CAAS, Inst Environm & Sustainable Dev Agr, 12 Zhongguancun South St, Beijing, Peoples R China
4.Huanghe Sci & Technol Coll, 94 Hanghai Middle Rd, Zhengzhou 450000, Peoples R China
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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