The sewage treatment process is simple

According to the nature of treatment methods, physical methods include precipitation, filtration, oil separation, air flotation, centrifugal separation and magnetic separation. Chemical methods: coagulation and precipitation, neutralization, redox and chemical precipitation. Physical and chemical methods: adsorption, ion exchange, extraction, stripping, stripping. Biological methods: activated sludge method, biofilm method, anaerobic method and biological nitrogen and phosphorus removal method. According to the water quality and the destination of the treated water, the primary treatment: mechanical treatment (pretreatment stage) coarse and fine grids, grit chamber, primary sedimentation tank, air flotation tank and regulating tank. Secondary treatment: The main processes include biochemical treatment (main body) activated sludge method, CASS method, A2/O method, A/O method, SBR, oxidation ditch and hydrolytic acidification tank. Tertiary treatment: control eutrophication and reuse. Advanced catalytic oxidation, biological aerated filter, fiber filter, activated sand filter, reverse osmosis and membrane treatment. There are generally disinfection pools for reclaimed water reuse: ultraviolet ozone disinfection pool and chlorine dioxide disinfection pool.