Membrane separation-based combined process The most widely used membrane technologies in reclaimed water treatment are microfiltration, ultrafiltration, dialysis, nanofiltration, reverse osmosis (reverse osmosis water treatment ). Microfiltration can effectively remove particulate matter from sewage, which is equivalent to the medium filtration treatment in traditional processes. Ultrafiltration can effectively remove particulate and macromolecular substances in sewage. Nanofiltration and reverse osmosis are more effective in removing soluble small molecular substances in water. effective.


The system combinations of membrane treatment processes mainly include:
Process 1: secondary effluent → coagulation sedimentation, sand filtration → membrane separation → disinfection process 2: secondary effluent → sand filtration → microfiltration → nanofiltration → disinfection process 3: secondary effluent → ozone → ultrafiltration or microfiltration → disinfection