Performance of different configurations of hybrid growth membrane bioreactor (HG-MBR) for treatment of mixed wastewater

► A hybrid growth Membrane BioReactor (HG-MBR) with four configurations was tested. ► An adequate balance between MLSS and biofilm fractions is important. ► A proper aeration design is the key for driving carriers' recirculation. ► The HG-MBR can reduce MLSS concentration without loss of removal efficiency.