Immersed MBR membrane tank device, and method for treating sewage by using same

Abstract

The invention relates to an immersed MBR membrane tank device, and a method for treating sewage by using the same. The immersed MBR membrane tank device comprises a PLC, a total liquid level sensor, a raw water pump, a sewage treatment tank, an MBR membrane filtration assembly, an aeration washing assembly, a backwashing assembly, a water production assembly and a sludge discharge pump, and the MBR membrane filtration assembly comprises at least two MBR membrane filtration units. According to the invention, the defects of large occupied area, high manufacturing cost, low activated sludge concentration, low sewage treatment efficiency, low membrane flux recovery degree after MBR membrane cleaning and the like of the existing sewage treatment device are overcome; the MBR membrane filtration assembly is arranged in the sewage treatment tank, and the aeration washing assembly, the backwashing assembly, the water production assembly and the sludge discharge pump are connected into the sewage treatment tank and are controlled by the PLC, so that aeration, filtration, water production and backwashing are performed in the same sewage treatment tank; and the device has the advantages of standard water quality after treatment, small occupied area, low manufacturing cost, high activated sludge concentration, high sewage treatment efficiency, high membrane flux recovery degree after membrane cleaning and the like.

Description

technical field [0001] The invention relates to a submerged MBR membrane pool device and a sewage treatment method using the same, which are applied in the field of sewage treatment. Background technique [0002] Existing sewage treatment devices include aeration reaction tanks and secondary sedimentation tanks. The biological aerated filter is filled with biological fillers (activated sludge, etc.), the sewage is first reacted in the aeration reaction tank, and then enters the secondary sedimentation tank for precipitation, and then the supernatant in the secondary sedimentation tank (i.e. Sewage after sewage treatment) is discharged. However, its existence such as the removal of chlorine ions and total phosphorus is too high, the content of suspended solids, CODcr and ammonia nitrogen in the treated water does not meet the requirements, and it occupies a large area, high cost, low concentration of activated sludge, low sewage treatment efficiency, etc. many questions. A...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing sewage treatment equipment, such as large footprint, high cost, low concentration of activated sludge, low sewage treatment efficiency, and low recovery of membrane flux after MBR membrane cleaning, the invention provides a submerged The MBR membrane tank device and the method of using it for sewage treatment, by setting the MBR membrane filtration module in the sewage treatment tank, connecting the aeration flushing component, the backwashing component, the water production component and the sludge discharge pump into the sewage treatment tank, And it is comprehensively controlled by the PLC controller, so that aeration, filtration, water production, and backwashing are all carried out in the same sewage treatment tank. High treatment efficiency, high membrane flux recovery after membrane cleaning, etc.

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