Novel biological nitrogen removal process for the treatment of wastewater with low carbon to nitrogen ratio: A review - Kaiyao Hu; Wenxuan Li; Yaning Wang; Bo Wang; Hao Mu; Shuang Ren; Kexin Zeng; Hongjuan Zhu; Jinming Liang; Ya'e Wang; Juqiang Xiao (Journal of Water Process Engineering, 2023)