The flexible metabolism of Accumulibacter and prevalence of clade IIC due to nitrite stress in a denitrifying phosphorus removal sludge - Juan Ma; Haidong Jin; Wengqing Tian; Peng Wan; Yichen Zhang; Zhe Li; Yujun Guo; Xinyao Ma; Peng Wang; Xiaojun Yu (Process Safety and Environmental Protection, 2026)