Efficient synergistic treatment of municipal wastewater via partial nitrification coupled with anaerobic ammonium oxidation and microalgae (PN/A-M): A metagenomic functional analysis - Baiqi Fan; Xiuhong Liu; Xueying Su; Qing Yang; Yongqing Gao; Xiang Jia; Biao Wang; Baobao Shi; Nan Zhang; Jikai Lv (Journal of Environmental Chemical Engineering, 2026)