Biochar-microorganisms hybrid enhanced anaerobic digestion: Innovative insight considering electron transfer potential and functional network of microorganisms - Yun He; Zhi Wang; Caihong Shen; Shilei Wang; Yiyang Liu; Xiaoyong Li; Xueke Bai; Junhao Zhao; Xiaoling Zhao; Xingyao Meng; Yafan Cai; Jingliang Xu; et al. (Bioresource Technology, 2025)