Enhancing Anammox-sulfur autotrophic denitrification coupling with sludge/coal gangue biochar: Nitrogen removal performance and microbial community dynamics - Yaxin Hou; Jiawei Sun; Kaiyu Hou; Rong Zhao; Tiancheng Fang; Abuliti Abudula; Guoqing Guan; Yun Duan (Journal of Water Process Engineering, 2025)