1. Grille:
After being collected by the production wastewater management network system, it enters the subsequent treatment system after passing through a coarse grid. Coarse grid is mainly used to intercept large floating objects in Wastewater, ensuring the normal operation of subsequent treatment structures and effectively reducing treatment loads, providing guarantees for the long-term normal operation of the system.
2. Wastewater regulating tank:
Used to regulate water volume and ensure uniform water quality, so that Wastewater can enter the subsequent treatment unit more evenly. Setting up a pre aeration system in the regulating tank can improve the impact resistance of the entire system, reduce the foul odor of Wastewater in anaerobic conditions, and reduce the design scale of subsequent treatment units. Submersible Wastewater pumps are installed in the Wastewater tank to lift and send Wastewater to the subsequent treatment units.
3. Hypoxia pool:
Elastic packing is installed in the anoxic tank to intercept fine suspended solids in wastewater and remove some organic matter. The nitrification solution after reflux in the anoxic tank is subjected to denitrification and denitrification, which improves the removal rate of ammonia nitrogen in wastewater. The Wastewater treated with hypoxia enters the aerobic biological treatment tank.
4. Contact oxidation tank:
Most of the organic matter in the original Wastewater is degraded and purified here. Aerobic bacteria use fillers as carriers and utilize the organic matter in the Wastewater as food to decompose it into inorganic salts, thereby achieving the purpose of purification. The survival of aerobic bacteria requires sufficient oxygen, that is, there is enough dissolved oxygen in Wastewater to achieve the purpose of biochemical treatment. The air in the aerobic tank is provided by a fan, and a new type of semi soft biological packing material is used in the tank. The packing material has a large surface area ratio, long service life, easy film formation, and corrosion resistance. The bottom of the tank is equipped with a microporous aerator, which increases the transfer rate of dissolved oxygen. At the same time, it has the advantages of light weight, non aging, non clogging, and long service life. Contact the two major components inside the oxidation tank:
Packing: This process uses a new type of three-dimensional elastic packing, a layer dense high-efficiency biochemical packing, which has the advantages of large specific surface area, long service life, easy film formation, and corrosion resistance. At the same time, the filler has a certain degree of stiffness and can cut the bubbles in the Wastewater at multiple levels, increasing the efficiency of dissolved oxygen. In addition, the fillers are not easily agglomerated, avoiding blockage of the oxidation tank.
Aerator: This process uses a microporous aerator, which has a higher dissolved oxygen transfer rate than other aerators. Its biggest feature is that it does not age, is lightweight, has a long service life, and has advantages such as corrosion resistance and resistance to clogging.
5. Sedimentation tank:
After being treated in a biological contact oxidation tank, the wastewater flows automatically into a secondary sedimentation tank to further precipitate and remove detached biofilms and some organic and inorganic small particles. The sedimentation tank is based on the principle of gravity. When the wastewater containing suspended solids flows from bottom to top, the substances are precipitated by gravity. The effluent after sedimentation in the secondary sedimentation tank is clearer and more transparent. The secondary sedimentation tank is a vertical flow sedimentation tank, which uses a sludge pump to regularly lift sludge and gas into the sludge digestion tank. The treated water after sedimentation enters the subsequent treatment equipment.
6. Disinfection pool
After sedimentation, the virus and Escherichia coli indicators in the Wastewater still do not meet the discharge standards. In order to eliminate the virus and Escherichia coli, chlorine tablet disinfectant is added for disinfection treatment. The folded plate form is used to rely on its own gravity and directly discharge into nearby municipal pipelines.
7. Sludge digestion tank:
The remaining sludge discharged from the sedimentation tank is subjected to aerobic digestion and stabilization treatment in the tank to reduce the volume of sludge and improve its stability. The amount of sludge after aerobic digestion is relatively small. Regular contact should be made with the environmental sanitation department to remove and transport the sludge by suction truck or to carry out sludge dewatering treatment for external transportation. The supernatant is refluxed to the regulating tank.
8. Fan:
Used for gas supply to contact oxidation tanks, pre aeration of regulating tanks, and aerobic digestion treatment of sludge digestion tanks.
