Sewage treatment machine
Sewage treatment machines are classified according to the degree of treatment and can be divided into first, second and third stage treatment. Generally, the degree of sewage treatment is determined according to the water quality status and the whereabouts of the treated water.
It mainly removes suspended solid pollutants in sewage. Most of the physical treatment methods can only meet the requirements of primary treatment. After primary treatment, BOD can generally remove about 30%, which does not meet the discharge standard. 处理。 The primary treatment belongs to the pretreatment of the secondary treatment .
It mainly removes colloidal and dissolved organic pollutants (BOD, COD substances) in sewage. The removal rate can reach more than 90%, which makes the organic pollutants reach the discharge standard, and the suspended matter removal rate reaches 95%.
Further treatment of difficult-to-degrade organic matter, soluble inorganic matter such as nitrogen and phosphorus that can cause eutrophication of water bodies. The main methods are biological nitrogen and phosphorus removal method, coagulation sedimentation method, sand filtration method, activated carbon adsorption method, ion exchange method and electrodialysis method.
进入生物处理设备，有活性污泥法和生物膜法，（其中活性污泥法的反应器有曝气池，氧化沟等，生物膜法包括生物滤池、生物转盘、生物接触氧化法和生物流化床），生物处理设备的出水 进入二次沉淀池，二沉池的出水经过消毒排放或者进入三级处理，一级处理结束到此为二级处理，三级处理包括生物脱氮除磷法，混凝沉淀法，砂滤法，活性炭吸附法，离子交换法和电渗析 法。 The whole process is that the raw sewage passing through the coarse grille is lifted by the sewage lifting pump, then passes through the grille or screen, and then enters the sedimentation tank, and the wastewater separated by sand and water enters the primary sedimentation tank. The above is the first stage treatment (ie physical Treatment), the effluent from the primary sedimentation tank enters the biological treatment equipment, and there are activated sludge method and biofilm method, (the reactor of the activated sludge method has aeration tank, oxidation ditch, etc., and the biofilm method includes biological filter, biological Rotary table, biological contact oxidation method and biological fluidized bed), the effluent from the biological treatment equipment enters the secondary sedimentation tank, and the effluent from the secondary sedimentation tank is disinfected and discharged or enters the tertiary treatment. The first-stage treatment includes biological denitrification and phosphorus removal method, coagulation sedimentation method, sand filtration method, activated carbon adsorption method, ion exchange method and electrodialysis method. Part of the sludge from the secondary sedimentation tank is returned to the primary sedimentation tank or biological treatment equipment, and part of it enters the sludge concentration tank, and then enters the sludge digestion tank. After dewatering and drying equipment, the sludge is finally used.
Product advantages of sewage treatment machine:
1. Strong ability to resist impact load, the average residence time of contact oxidation method is more than 6 hours.
2. It has the ability to remove nitrogen and phosphorus, and can adjust the structure of the equipment to achieve the ability to treat industrial wastewater, domestic sewage, and urban sewage.
3. The fillers in the contact oxidation tank are mostly combined soft fillers, which are lightweight, high strength, stable physical and chemical properties, large specific surface area, strong biofilm adhesion ability, and high contact efficiency between sewage and biofilm.
4. In the contact oxidation tank, an aerator is used for aeration and aeration, so that the fiber bundles are constantly drifting, the aeration is uniform, and the growth of microorganisms is mature, which has the characteristics of the activated sludge method.
5. The effluent water quality is stable, the sludge output is small and easy to handle.
6. The submersible pump can be installed in the equipment to reduce engineering investment.
7. The equipment can be installed on the ground or buried underground. When buried in the ground, the upper cover can be used for greening, the plant area is small, and the ground structure is small.
8, easy to complete automatic control, simple management operations.
9, equipment can be connected to the car to make a mobile integrated sewage treatment equipment.