Research on System Optimizing of AAO-BAF Wastewater Treatment Process Shoubin Zhang, Wei Sun, Wenhai Jiao, Liping Qiu, Jingxiu Zhong and Yuze Li E3S Web Conf., 53 (2018) 04028 Published online: 14 September 2018 DOI: 10.1051/e3sconf/20185304028