An A2O-MBR system for simultaneous biological nitrogen and phosphorus removal from brewery wastewater at various nitrate recirculation ratiosVan Nu Thai Thien, Dang Viet Hung, Nguyen Thi Thanh Hoa, Thi Ha Nguyen and Phan Thanh TrongE3S Web Conf., 258 (2021) 08011DOI: https://doi.org/10.1051/e3sconf/202125808011