The integrated sewage treatment device is mainly designed to treat domestic sewage and similar industrial organic sewage. The main treatment method is contact oxidation, which is a mature biochemical treatment technology at present. Water quality design parameters are also calculated according to the water quality of ordinary domestic sewage. The average influent BOD is 5200mg/L and effluent BOD5 is 20mg/L.. * * It consists of six parts: (1) Primary sedimentation tank (2)
(1) Primary sedimentation tank: the primary sedimentation tank is a vertical flow sedimentation tank. The rising speed of sewage in the sedimentation tank is 0.2-0.3 mm/s, and the settled sludge is lifted to the sludge tank by air. (Note: WSZ0.5-5m3/h does not include the primary sedimentation tank)
(2) Contact oxidation tank: the water after primary sedimentation flows into the contact tank for biochemical treatment. The contact tank is divided into three stages, with a total residence time of 4-6 hours. The filler is a new type of trapezoidal filler, which is easy to conjunctiva and does not block. The specific surface area of the filler is 160m2/m3, and the gas-water ratio of the contact tank is about 12: 1. (Note: WSZ0.5-5m3/h contact pool is Class II)
(3) Secondary sedimentation tank: Biochemical sewage flows into the secondary sedimentation tank, which is operated by two vertical sedimentation tanks in parallel, and the rising speed is 0. 1-0. 15mm/s, and the sludge is discharged from the air into the sludge tank. (WSZ0.5-5m3/h sludge is injected into the sludge pool by itself)
(4) Disinfection pool and disinfection pool are 30 minutes according to the specification (TJ 14-74). If it is hospital sewage, the retention time of disinfection tank can be increased to 1- 1.5 hours. Disinfection adopts the disinfection method of solid chlorine tablets contacting and dissolving, and the disinfection device can constantly change the dosage according to the water output, so as to achieve the purpose of adding more water and more drugs, less water and less drugs. Other necessary disinfection equipment can be prepared separately. (Note: If it is used for industrial sewage, the disinfection tank and disinfection device can be omitted. )
(5) Sludge pond: all the sludge in the primary sedimentation pond and the secondary sedimentation pond is lifted to WSZ sludge pond by air for aerobic digestion, and the supernatant of the sludge pond is refluxed to the contact oxidation pond for reprocessing. There is little excess sludge after digestion, which is generally cleaned once every 1-2 years. The cleaning method can be carried out by putting the dung suction car into the bottom of the sludge tank for suction. (Note: WSZ0.5-5m3/h sludge anaerobic digestion)
(6) Fan room and fan: The fan room is located above the disinfection pool, and the entrance of the fan room adopts double-layer sound insulation, and the entrance is equipped with muffler and fan filter, which is basically noiseless during operation.
I. Integrated buried domestic sewage treatment equipment
Integrated buried domestic sewage treatment equipment is a kind of domestic sewage and industrial wastewater similar to domestic sewage, which is mainly based on A/O biochemical process and integrates the sedimentation, oxidation and disinfection of biodegradable sewage. The equipment is compact in structure, occupies less land, and is all located underground, with economical operation, strong impact resistance, high treatment efficiency and convenient management and maintenance. After user's use, the performance of the equipment meets the relevant requirements, and the product has been approved by the State Environmental Protection Administration. These products will surely bring good news to the protection of human living environment.
device characteristics
1, which can be buried below the surface. Flowers and trees and lawns can be planted on the upper part of the equipment, or it can be set indoors.
2, no impact on the surrounding environment, less sludge production, noise is less than the second class area standard.
3, fully automatic control, no need for professional management.
4. Simple operation, convenient maintenance, novel technology, good effect and long service life.
5. The equipment can be arranged according to the standard or specially according to the terrain.
Application scope of equipment
1, water treatment capacity: the standard type is 1.0 ~ 80.0(m3/h), and it needs to be designed separately if it is greater than 80.0(m3/h).
2. Raw water concentration: BOD5: standard type ≤250mg/L, enhanced type ≤400mg/L, if it exceeds 400mg/L, it should be designed separately. ..
3. The equipment is mainly suitable for domestic sewage and similar industrial wastewater in residential areas, hotels, docks, airports, shopping malls, sanatoriums, schools, factories and mines.
Material selection of sewage treatment equipment
1, all stainless steel structure
2.A3 steel plate structure
3.(Q235) Steel Plate and FRP Composite Structure
4, glass fiber reinforced plastic round
5. Reinforced concrete structure
Process description of wsz equipment
This equipment is mainly designed for the treatment of domestic sewage and industrial organic sewage. The main treatment method is to contact the oxidation tank with the mature biochemical treatment technology at present. The design parameters of water quality are calculated according to the influent BOD5 of sewage being 250mg/L and effluent BOD5 being 20 mg/L. * * * consists of seven parts: (1) primary sedimentation tank; (2) anoxic pool; (3) contacting the oxidation tank; (4) secondary sedimentation tank; 5] Disinfection pool and disinfection device; [6] Sludge tank; Once the fan room.
(1) Primary sedimentation tank: the primary sedimentation tank is a vertical sedimentation tank, and the rising speed of sewage in the sedimentation tank is 0.3 ~ 0.4 mm/s, and the settled sludge is lifted to the sludge tank. There is no primary sedimentation tank for SFW-5 and below equipment.
⑵ anoxic tank: an anoxic tank is set up for denitrification, and YDT-type three-dimensional elastic filler is set in the tank as the carrier of denitrifying bacteria. Under the action of denitrifying bacteria, denitrifying ammonia and nitrous oxide in the nitration solution are reduced to nitrogen, achieving the purpose of denitrification. The effective retention time of anoxic tank is 2.5～3.5h, and the dissolved oxygen is controlled at ≤ 0.5mg/L. ..
⑶ Contact oxidation tank: Sewage flows into the contact tank for biochemical treatment. The contact tank is divided into three stages, and the retention time is 8h. (The contact oxidation time of reinforcement equipment can reach 8 ~ 12h. The filler is a new type of elastic filler, which is easy to conjunctiva and not blocked. The gas-water ratio of the contact oxidation tank is about 15: 1.
(4) Secondary sedimentation tank: biochemical sewage flows into the secondary sedimentation tank for vertical sedimentation, with surface load < 1.0m3/m2.h, and sludge is discharged into the sludge tank.
(5) Disinfection pool and disinfection device: according to the standard of TJ 14-74, the disinfection pool shall last for at least 30 minutes. If it is hospital sewage, the retention time of disinfection tank can be increased to1~1.5h. ..
Disinfection adopts the disinfection method of contact dissolution of solid chlorine tablets. The disinfection device can continuously change the dosage according to the water output, so as to achieve the purpose of more water, more medicines and less water. If necessary, other disinfection equipment can be prepared separately.