Biochar-mediated enhancement of dark fermentative H2 production from xylose wastewater: Insight into the microbial community structure succession to metabolic performance - Yawen Zhao; Yuhao Wang; Chengjie Wen; Xuanming Zhang; Qiulan Xie; Xinyi Du; Lili Dong; Guangli Cao; Nanqi Ren (Biomass and Bioenergy, 2025)