Filtering device, sewage filtering system, and sewage filtering technology

Abstract

The invention provides a filtering device, a sewage filtering system, and a sewage filtering technology, and belongs to the technical field of sewage treatment. The filtering device comprises filter tubes, magnetic rings and a water collecting tube, every filter tube comprises an outer screen tube, an inner screen tube and magnetic particles, and the magnetic rings can move along the length direction of the outer screen tubes in order to drive the magnetic particles to wriggle; and the water collecting tube communicates with the bottoms of the inner screen tubes to discharge filtered water. The filtering device can achieve rapid sludge formation, reduce the compactness of a sludge cake layer, increase the water permeability of the sludge layer, prolong the filtration cycle of a micro-screen dynamic membrane and improve the outlet water quality of the dynamic membrane. The sewage filtering system comprises a membrane tank, a gas supply device, a lifting device and the filtering device. The system has the advantages of the filtering device, the sewage filtering technology adopts the filtering system, and can effectively improve the sewage treatment effect through a membrane forming process, a filtering process and an aeration desliming process.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a filtering device, a sewage filtering system and a process. Background technique [0002] The current sewage treatment process uses activated sludge to assimilate organic matter in water to remove pollutants in water. The final process of sewage treatment is a sedimentation tank to achieve solid-liquid separation. However, the secondary settling tank occupies a large area, is unstable in operation, and has poor effluent quality. [0003] Membrane bioreactor technology is a high-efficiency sewage resource technology that has developed rapidly in recent years. In recent years, it has been rapidly developed and widely used. However, membrane filtration technology is a physical screening process. With the long-term operation of the membrane, The problem of membrane fouling is inevitable, and membrane cleaning is a cumbersome process, so new forms of membrane filtration eq...

AI Technical Summary

Problems solved by technology

However, with the extension of filtration time, the mud cake layer is gradually compacted, resulting in a gradual decrease in filtration flux and affecting the water output.

In addition, the mud cake layer is gradually compacted, which will also affect the cleaning effect, and the mud cake is not easy to be washed off

Moreover, frequent cleaning will compact the mud cake layer and repeat the film-forming process to ensure the relaxation of the mud cake layer. However, during the film-forming period, due to the incomplete formation of the mud cake layer, the effluent water will cause excessive turbidity. Affects the water quality of the effluent, and it is also used to return the effluent to the original system during this period of time, but it will increase the energy consumption of the system

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