Gas stripping type backflow integrated MBR sewage treatment equipment

Abstract

The invention discloses gas stripping type backflow integrated MBR sewage treatment equipment. The equipment includes an MBR biochemical reaction tank, which comprises an anaerobic reaction pool, an anoxic reaction pool and an aerobic reaction pool that are arranged in order. The aerobic reaction pool is internally equipped with a multi-point backflow pipe communicated with the anaerobic reactionpool and the anoxic reaction pool, one side of the aerobic reaction pool far from the anaerobic reaction pool is equipped with a disinfection pool, the aerobic reaction pool is internally equipped with an MBR membrane assembly, the aerobic reaction pool MBR membrane assembly is connected to a self-priming pump, and the self-priming pump is connected to the disinfection pool through a pipeline. Thegas stripping type backflow equipment provided by the invention replaces the traditional water pump backflow way, reduces the investment of mechanical equipment, effectively utilizes the surplus airvolume of a fan to reduce the operation cost, the multi-point backflow way guarantees the requirement of the process for nitrogen and phosphorus removal, also the backflow quantity can be flexibly adjusted according to operation conditions, the disinfection pool and a control system are integrated in the biochemical reaction tank, and construction investment of civil engineering is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an air-lifting reflux integrated MBR sewage treatment equipment. Background technique [0002] At present, most domestic sewage needs to meet the first-level A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" and be discharged directly, or meet the corresponding reuse water standards for reuse. The requirements for sewage treatment are relatively high, and commonly used small integrated equipment Mainly adopt the technology with MBR as the core. MBR, also known as membrane bioreactor, is a new water treatment technology that combines activated sludge method and membrane separation technology. The traditional activated sludge method uses the density difference between microorganisms and water to separate sludge and water (activated sludge and water) through gravity sedimentation. This sedimentation method is greatly affected by the change...

AI Technical Summary

Problems solved by technology

However, the construction of the disinfection tank is cumbersome and requires a large investment. Building a disinfection tank alone increases the floor area of ​​the domestic sewage treatment system, and using a water pump to return the mixed solution increases energy consumption. Generally, it only returns to one reaction tank when the gas lift is used.

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