TY - DATA T1 - Pilot scale treatment of polluted surface waters using membrane-aerated biofilm reactor (MABR) PY - 2017/11/08 AU - Yi Li AU - Kaisong Zhang UR - https://tandf.figshare.com/articles/journal_contribution/Pilot_scale_treatment_of_polluted_surface_waters_using_membrane-aerated_biofilm_reactor_MABR_/5579962 DO - 10.6084/m9.figshare.5579962.v1 L4 - https://ndownloader.figshare.com/files/9702976 KW - Membrane-aerated biofilm reactor (MABR) KW - surface water KW - total nitrogen KW - C/N ratio N2 - The increasing threat to human health and aquatic life caused by nitrogen pollution in surface waters requires critical attention. The membrane-aerated biofilm reactor (MABR) is a promising alternative compared to conventional technologies. In this work, a pilot-scale MABR system was employed to treat polluted surface water in continuous-flow mode. The nitrogen removal performances with the variations of the aeration parameters, hydraulic loading and C/N ratio were explored. The results showed that intra-membrane pressure plays a dominant role in improving the denitrification rate. The nitrification dynamics of the MABR system were favoured in conditions of low influent C/N ratios and hydraulic loading, but limit the denitrification process due to insufficient carbon source. A counter optimal hydraulic loading of 0.016 m3/(m2 day) (hydraulic retention time of 36 h), and a corresponding increase in the influent C/N ratio was beneficial for nitrogen removal. When the influent C/N ratio was raised to a factor of 8, the total organic carbon (TOC), ammonium and total nitrogen (TN) removal efficiency could reach 80.0%, 92.2% and 60.3%, respectively. This indicated that the MABR has a potential to remove TN by simultaneous nitrification and denitrification (SND) in polluted surface water treatment. ER -