MBR is a process of Ultra filtration system in which semi permeable membranes are used to separate the solid and liquid form the good biological system through the way of after biological process (or) after clarified water use of clarifier process. The MBR is used to remove particulate and microbiological contaminates, but it does not remove the ions and small molecules, Membrane is fully submerged and comp active.

MBR system is to avoid the system of Conventional treatment methods like Clarifier, Sand filters like PSF&ACF and UF. And like conventional secondary treatment utilizes activated sludge, but place of gravity clarification the MBR employs a physical barrier in a form of a membrane for solid liquid separation. The membrane is constructed to serve as physical barrier, limiting the passage of suspended solids and colloidal materials while allowing clean effluent of Permeate to flow through, Since the MBR System does not rely on gravity separation, it can be operated at MLSS concentration up to 12 g/L in the membrane tank and also MBR is working without MLSS concentration like clarified water. The hollow fibre membrane is operation in outside to inside flow path with negative pressure and the micron is 0.03 µm.