MBR membrane domestic sewage treatment equipmentThe main purpose is to treat domestic sewage and similar industrial organic wastewater to meet the water quality requirements for reuse, so that the treated wastewater can be utilized as a resource. On the basis of summarizing domestic and foreign experiences, continuous improvement of sewage treatment processes has promoted the great development of sewage treatment equipment.

case

The upgrading and renovation project of Tongchuan Sewage Treatment Plant in Yijun County, Shaanxi Province has been completed, with a total investment of 7.75 million yuan. The renovation involves adding one pre reaction tank, one flocculation tank, and one fixed plate filter tank on the basis of the original treatment process. The aeration head, reflux pump, and sludge pump in the CASS tank will be replaced, and dosing equipment will be added. The supporting systems such as self-control, water, electricity, and heating will also be upgraded to ensure that the sewage discharge meets the Class A discharge standard and the COD (Chemical Oxygen Demand) discharge concentration does not exceed 50mg/L.

The upgrading and upgrading project of the sewage treatment plant in Baiyun District, Guiyang City, Guizhou Province has been completed. The designed effluent quality of the original sewage treatment plant has been raised from the national "Pollutant Discharge Standards for Urban Sewage Treatment Plants" level I B standard to * A standard, with a total investment of 36.8142 million yuan and a construction scale of 60000 tons/day. The construction includes equipment and buildings such as intermediate lift pumps, sedimentation tanks, filtration tanks, dosing rooms, air compressor rooms, and intermediate lift pump rooms. The key core part is the process of water being lifted by the intermediate lift pump and reaching the reaction tank, sedimentation tank, filtration tank, and dosing room, which can reduce suspended solids and total bacterial communities in the water, thereby improving water quality.

MBR membrane domestic sewage treatment equipmentThe six parts consist of: (1) primary sedimentation tank; (2) Contact oxidation tank; (3) Secondary sedimentation tank; (4) Disinfection pool and disinfection device; (5) Sludge tank; (6) Fan room, fan. The following are discussed separately:

(1) Primary sedimentation tank: The equipment's primary sedimentation tank is a vertical flow sedimentation tank, and the upward flow velocity of sewage in the sedimentation tank is 0.6-0.7 mm/s. The settled sludge is carried to the sludge tank by air. (Note: WSZ-A O.5-5m/h does not have a primary sedimentation tank)

(2) Contact oxidation tank: After initial sedimentation, the water flows automatically to the contact tank for biochemical treatment. The contact tank is divided into three stages with a total residence time of more than 1 hour. The contact oxidation time of the reinforced equipment can reach 6 hours, and the filler is a novel trapezoidal filler. Easy to form conjunctiva and not clog. The specific surface area of the filler is 160m/m, and the gas water ratio of the contact tank is around 12:1. (WSZ-A 0.5-5T/h, contact cell is secondary)

(3) Secondary sedimentation tank: Biochemical wastewater flows into the secondary sedimentation tank, which consists of two vertical flow sedimentation tanks operating in parallel. The upward flow velocity is 0.3-0.4 millimeters per second. The sludge is discharged by air lifting to the sludge tank. (Note WSZ-A0.5-5mT/h, sludge flows automatically into the sludge tank)

(4) Disinfection pool and disinfection device: The disinfection pool is designed according to the specifications: "TJI4-74" standard is 30 minutes. If it is hospital sewage, the disinfection pool can increase the residence time to 1-1.5 hours, using a solid chlorine contact dissolution disinfection method. The disinfection device can continuously change the dosage according to the size of the water output, achieving the goal of adding more water and more medicine, and adding less water and less medicine. Other disinfection devices can be prepared separately. (Note: If used for industrial wastewater disinfection tanks and disinfection devices, it is not necessary)

(5) Sludge tank: All sludge from the primary and secondary sedimentation tanks is transported by air to the WSZ-A sludge tank for aerobic digestion. The clear liquid from the sludge tank flows back to the contact oxidation tank for further treatment. After digestion, there is very little residual sludge, usually cleaned once every 1-2 years. The cleaning method can be to use a suction truck to extend from the inspection hole of the sludge tank into the bottom of the sludge and carry out suction and transportation. (WSZ-A 0.5-5T/h, sludge is digested anaerobically)

(6) Fan room and fan: The fan room of equipment WSZ-A is located above the disinfection pool, and the inlet adopts double-layer sound insulation. The inlet has a muffler and fan filter, so there is no noise during operation. The fan adopts two L-shaped Roots blowers, which can automatically alternate operation. The operating life of a single wind turbine is about 30000 hours.