Study on sequencing batch membrane bioreactor treating simulated municipal wastewater
序批式膜生物反应器(SMBR）处理生活污水的研究

The performance of a continuous membrane bioreactor (CMBR) and a sequencing batch membrane bioreactor (SMBR) was investigated with synthetic wastewater. The results showed that the average effluent COD of CMBR and SMBR were 15.42 mg/L and 13.42 mg/L, respectively, and the corresponding average removal efficiencies were 91.37% and 92.39%, respectively. Simultaneously, the average effluent NH+4-N of CMBR and SMBR were 0.22 mg/L and 1.12 mg/L, respectively, and the corresponding average removal efficiencies were 99.37% and 95.63%, respectively. Membrane fouling analysis indicated that the membrane fouling rate of CMBR was 1.633 kPa/d, while that of SMBR was only 0.302 kPa/d in ready state. This can be further elucidated by the higher concentrations of SMP and LB in the CMBR compared to those in the SMBR, resulting in severe membrane fouling.