MBR three-layer automatic cleaning method

Abstract

The invention discloses an MBR three-layer automatic cleaning method. The method comprises the steps: closing an effluent washing pump, switching on a water pumping solenoid valve so as to achieve automatic backflow of water in an effluent tank and raising of clear water, filling the interior of an MBR so as to achieve automatic falling of a part of impurities on the MBR membranes through a node channel, starting a blower, shaking membrane pieces so as to clean the impurities, performing secondary cleaning of the membranes, scrubbing the surface of the MBR membranes by using polyurethane, starting the effluent washing pump so as to pump water to an effluent tank, blasting air to the MBR membranes for 2 minutes, turning off a rotating motor, switching on a water suction pump, injecting water until complete immersion of the MBR membrane group, generating bubbles in water through combination of the blower with through holes in a vertical spiral pipeline and through holes in a lateral spiral pipeline, performing flow diversion on the generated bubbles through blades so as to make the bubbles move clockwise with the water flow along an integrated treatment tank and perform circulation cleaning on the three-layer MBR membranes sequentially, switching off the blower after circulation cleaning of 1.5-2 minutes, switching on the effluent washing pump, discharging the water with the impurities, switching off the rotating motor after 5 minutes, and discharging the settled impurities so as to complete deep cleaning.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an MBR three-layer automatic cleaning method. Background technique [0002] my country's rural population is large, and the discharge of domestic sewage in rural areas is large. Due to scattered areas, large population, and difficulty in collection, rural sewage has become an important factor in my country's water pollution problems. The main source of rural sewage is domestic sewage, so its characteristics are relatively obvious, mainly organic matter and nitrogen, phosphorus and inorganic salts. With the strengthening of environmental protection awareness, various sewage treatment equipment have appeared on the market. However, the existing sewage treatment equipment does not work well, and the cleaning of the equipment is inconvenient. [0003] In particular, the existing sewage treatment uses MBR membranes for sewage treatment. However, the cleaning ef...

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Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and provide a three-layer MBR automatic cleaning method to solve the poor cleaning effect of the existing MBR membrane. After repeated use, the sewage treatment capacity gradually decreases, which seriously affects sewage filtration. Deal with the problem of effect

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