Study on Hybrid Membrane Bioreactor for Black Water Treatment and Reuse

Due to the more and more stringent requests for black water treatment and reuse, and the high-energy consumption of the traditional membrane bioreactor(MBR),a new hybrid membrane bioreactor with gravity outflow was developed.The hybrid MBR has a sequencing batch reactor(SBR) coupled with a separated immersed membrane module.The outflow from the membrane unit is intermittently drained by the water head in SBR.The concentrated mixed liquid is circulated by the air lift force between SBR and membrane unit.When COD,NH3-N,TN,TP and SS in the influent are(330±33) mg/L,(12.1±1.2) mg/L,(13.5±1.3) mg/L,(1.9±0.2) mg/L and(135±5.3) mg/L respectively,the removal efficiencies of COD,NH3-N,TN,TP and SS are 92.4%,95%,50.5%,96.4% and 100% respectively.The results indicate that the hybrid MBR has a good effect on the removals of COD,NH3-N,TP and SS,and the effluent comes up to the water quality standard of GB/T 18920-2002.