A Membrane Bioreactor is an advanced wastewater technology that combines biological treatment processes with membrane filtration techniques for treating industrial and municipal wastewater to produce high-quality effluent.In the MBR process, membranes act as a solid-liquid separation device, keeping the biomass within the bioreactor before discharging the treated effluent to the nature. Basically, they take the place of clarifiers used in the conventional activated sludge (CAS) process.