EC Container 5
Process Basics
Membrane bioreactors combine conventional biological activated sludge processes with membrane filtration. The membranes are directly submerged in the activated sludge. The activated sludge (biomass) is separated from the liquid as it passes through the membranes and is retained in the biological reactor. Conventional sedimentation processes are not required. The small membrane pores (<0.1μm) retain suspended matter, bacteria, and viruses (pathogens). The result is a high quality effluent that can be reused. Membranes are arranged (packaged) in modules for easy installation and maintenance. Aeration devices are located at the bottom of membrane modules. Air bubbles create a cross flow parallel to the membrane surface and generate biomass degradation. The flow across the membranes creates a shear force that limits build-up on the membrane surface.
Membrane bioreactors combine conventional biological activated sludge processes with membrane filtration. The membranes are directly submerged in the activated sludge. The activated sludge (biomass) is separated from the liquid as it passes through the membranes and is retained in the biological reactor. Conventional sedimentation processes are not required. The small membrane pores (<0.1μm) retain suspended matter, bacteria, and viruses (pathogens). The result is a high quality effluent that can be reused. Membranes are arranged (packaged) in modules for easy installation and maintenance. Aeration devices are located at the bottom of membrane modules. Air bubbles create a cross flow parallel to the membrane surface and generate biomass degradation. The flow across the membranes creates a shear force that limits build-up on the membrane surface.
Conventional Treatment versus Membrane Bioreactor