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Domestic sewage treatment equipment (fiberglass)
Domestic sewage treatment equipment (fiberglass)
Product details
1、 Overview
The fiberglass reinforced plastic sewage treatment equipment adopts the world's advanced biological treatment process, which combines the removal of BOD5, COD, and NH3-N. It is widely used in the treatment of domestic sewage and similar industrial organic sewage in hotels, villa communities, and residential areas, replacing septic tanks with low removal rates and effluent that cannot meet the national comprehensive discharge standards. Through field application, it has been shown that the WSZ-AO series sewage treatment equipment is a device with excellent treatment efficiency and easy management.
2、 Scope of application:The treatment of domestic sewage in hotels, nursing homes, hospitals, schools, residential areas, villas, and other residential areas. The treatment of wastewater from aquatic processing plants, livestock processing plants, fresh milk processing plants, and other production facilities.
3、 Product Features
Fiberglass sewage treatment equipment can be buried underground, and the surface can be used as green or square land. Therefore, this equipment does not occupy the surface area, does not require building, and does not require heating and insulation.
The sewage treatment consists of secondary tanks, made of steel structure and buried shallowly. The steel structure pool adopts the domestically pioneered interpenetrating network anti-corrosion coating for corrosion prevention. It is a polymer network formed by interpenetrating rubber and plastic networks, which can resist acid
Alkali, salt, gasoline, kerosene, aging resistance, abrasion resistance, can bring rust and rust prevention. After applying the coating, the anti-corrosion life of the equipment can generally reach more than 12 years.
The AO biological treatment process in sewage treatment equipment adopts a push flow biological contact oxidation tank, which has better treatment than fully mixed or two-stage series fully mixed biological contact oxidation tanks. And it has a smaller volume than activated sludge tanks, strong adaptability to water quality, good impact resistance, stable effluent quality, and will not cause sludge expansion. At the same time, a new type of elastic three-dimensional packing material was used in the biological contact oxidation tank, which has a large actual specific surface area and is convenient for microbial biofilm formation and detachment. Under the same organic load conditions, it has a higher removal rate of organic matter than other packing materials and can improve the solubility of oxygen in water. Due to the use of a material contact oxidation tank in the AO biological treatment process, the volume load of the packing is relatively low, and the microorganisms are in the self oxidation stage, resulting in less sludge production. In addition, the moisture content of the sludge produced by the biological contact oxidation tank is much lower than that of the sludge produced by the activated sludge tank. Therefore, the amount of sludge generated by the WSZ series sewage treatment equipment is relatively small, and generally only needs to be discharged once every 90 days.
In addition to conventional measures such as vibration isolation pads and silencers, the fiberglass integrated sewage treatment equipment also incorporates new sound-absorbing materials on the inner wall of the blower room, reducing the noise level during operation to below 50 decibels and minimizing the impact on the surrounding environment.
The fiberglass integrated sewage treatment equipment is equipped with a fully automatic electrical control system and equipment damage alarm system. The equipment has good reliability, so there is generally no need for dedicated personnel to manage it, only monthly and quarterly maintenance and upkeep are required
4.1 Description of sewage treatment process flow:
This project adopts the biofilm method: anaerobic aerobic (A/0) treatment process. A/O, also known as anaerobic+aerobic biological contact oxidation, is a mature biological treatment process that has the advantages of high volumetric load, fast biodegradation rate, small footprint, low infrastructure investment and operating costs. It can replace the ordinary activated sludge method used in urban sewage treatment and is particularly suitable for the treatment of medium and high concentration industrial wastewater, with low investment, small footprint, and high treatment efficiency. This process adopts a combination of biological contact oxidation and precipitation, and is mature and reliable. Sludge is precipitated in the equipment, and a portion of the sludge is further oxidized and decomposed due to the action of dissolved oxygen, while another portion is lifted into the sedimentation tank. The system sludge only needs to be regularly pumped in the sedimentation tank. The working program of the main control equipment such as the wind turbine and submersible sewage pump in the system is input into the PLC machine to achieve automatic operation, reduce the workload of operation, and minimize unnecessary human damage.
4.1 Grille: The wastewater discharged from production is collected by the pipeline network system and enters the subsequent treatment system after passing through a coarse grille. Coarse grid is mainly used to intercept large floating objects in sewage, ensuring the normal operation of subsequent treatment structures and effectively reducing treatment loads, providing guarantees for the long-term normal operation of the system.
4.1.2 Sewage regulating tank: used to regulate the water volume and uniform water quality, so that the sewage can enter the subsequent treatment unit relatively 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 sewage in anaerobic conditions, and reduce the design scale of subsequent treatment units. Submersible sewage pumps are installed in the sewage tank to lift and send sewage to the subsequent treatment units.
4.1.3 Hypoxia tank: Elastic packing is installed in the anoxic tank to intercept small suspended solids in sewage 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 sewage treated with hypoxia enters the aerobic biological treatment tank.
4.1.4 Contact oxidation tank: Most of the organic matter in the original sewage is degraded and purified here. Aerobic bacteria use fillers as carriers and utilize the organic matter in the sewage 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 sewage 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:
(1) 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 sewage at multiple levels, increasing the efficiency of dissolved oxygen. In addition, the fillers are not easily agglomerated, avoiding blockage of the oxidation tank.
(2) Aerator: This process uses microporous aerators, which have a higher dissolved oxygen transfer rate than other aerators. They are characterized by non aging, light weight, long service life, corrosion resistance, and are not easily clogged.
4.1.5 Sedimentation tank: After the sewage is treated by the biological contact oxidation tank, the effluent flows automatically into the secondary sedimentation tank to further precipitate and remove the detached biofilm and some organic and inorganic small particles. The sedimentation tank is based on the principle of gravity. When the sewage 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.
4.1.6 Disinfection tank: After sedimentation, the virus and Escherichia coli indicators of the sewage still do not meet the discharge standards. In order to eliminate the disease and Escherichia coli, chlorine tablets 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.
4.1.7 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.
4.1.8 Fan: Used for contact oxidation tank gas supply, regulating tank pre aeration, and aerobic digestion treatment of sludge digestion tank.
4.2 Electrical Control Instructions
The sewage treatment equipment adopts PLC fully automatic control from inlet to outlet. The specific control content is as follows:
(1) The sewage regulating tank is equipped with a liquid level control device, which operates automatically at high liquid levels; Stop the pump at low liquid level.
(2) The fan operates alternately and provides uninterrupted air supply. Two fans can set the automatic switching interval time as required.
(3) It is recommended to use dual power supply for sewage treatment plants. The main machines and pumps in the processing technology are used alternately, with mutual use and backup, to achieve the goal of ensuring safety
The purpose of ensuring normal operation.
(4) The start-up, shutdown, and switching of various electrical equipment are automatically linked by a programmable controller according to the program. At the same time, there are automatic and manual transfer switches on the panel of the control cabinet, which can be switched to manual control if necessary.
(5) All types of electrical equipment are equipped with circuit short-circuit and carrier devices, and indicator lights are also installed to display the working status of each electrical equipment.
4.3 The electrical control cabinets in the equipment room and operation room should be installed in the ground building. It is recommended to arrange them in the water treatment room next to the main sewage treatment structure to facilitate daily operation management and equipment maintenance.
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