Two distinct patterns for advanced simultaneous nitrogen and phosphorus removal treating low C/N wastewater in a low DO anaerobic/oxic/anoxic-aerobic granular sludge (AOA-AGS) system. - Ma, Jingwei; Han, Ying; Ji, Yaning; Sun, Hui; Bi, Peng; Chen, Long; Zhang, Xinrui; Li, Xinru; Ren, Shiquan; Zhu, Liang; He, Qiulai (Environmental Research, 2026)