文献类型：期刊文献

英文题名：Impacts of biogas residual biochar on anaerobic digestion of food waste with different organic loading rate: Methanogenic performance and metabolic pathways

作者：Li, Xunan[1,2];Chu, Siqin[1];Zhang, Yuchen[1];Zhou, Yanbo[3,4];Su, Yinglong[1,4];Wu, Dong[1,4];Hong, Seungkwan[5];Zhan, Min[5];Xie, Bing[1,4]

机构：[1]East China Normal Univ, Shanghai Engn Res Ctr Biotransformat Organ Solid W, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200241, Peoples R China;[2]North China Univ Water Resources & Elect Power, Sch Environm & Municipal Engn, Zhengzhou 450045, Peoples R China;[3]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[5]Korea Univ, Sch Civil, Environm & Architectural Engn, Seoul 02841, South Korea

年份：2026

卷号：407

外文期刊名：FUEL

收录：;EI(收录号：20254719552294);WOS:【SCI-EXPANDED(收录号:WOS:001609273600005)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22276059) and the International Scientific and Techno-logical Cooperation Program of Science and Technology Com-mission of Shanghai Municipality, China (24230712100) .

语种：英文

外文关键词：Food waste; Anaerobic digestion; Organic loading rate; Biogas residual biochar; Microbial community

摘要：This study investigated the effects of different doses of biogas residue biochar (BRB) (5 g /L and 10 g/L) on the methanogenic performance and metabolic pathways during anaerobic digestion (AD) of food waste (FW) under a wide range of organic loading rate (OLR) (5, 10, 20, and 30 g volatile solid (VS)/L) conditions. The results indicated the cumulative methane yield was highest (375 +/- 8.40 mL/g VS) at an OLR of 10 g VS/L when no BRB was added, while suffered significant inhibition at higher OLRs (>10 g VS/L) due to volatile fatty acid (VFA) accumulation. BRB addition (5 g/L) significantly facilitated methane production by first enhancing organic matter degradation and VFA content (days 1---10), and then accelerating VFA consumption (days 18---50), with these beneficial effects becoming progressively more pronounced at higher OLRs (>5 g VS/L) in this study. Microbial and metabolic analysis revealed key microbial communities included Aminobacterium, Proteiniphilum, Clostridium_sensu_stricto_1, Syntrophomonas, and Methanosarcina were enriched, and methanol and methylamine/ dimethylamine/trimethylamine methanogenic pathways were enhanced under high OLR conditions with BRB addition. This study provides metabolic flexibility for maintaining stable methane production in response to high OLR while offering a closed-loop solution for digestate valorization.