Biochemical treatment device for sewage and treatment method thereof

Abstract

The invention relates to a biochemical treatment device for sewage, which comprises an air supply pipe, a biochemical pool body, and a water outlet and a sewage inlet both formed in the biochemical pool body; an inverted-cone-shaped separation rotational flow mud collecting pit is formed at the bottom of the biochemical pool body; a mud discharging port is formed in the mud collecting pit; a horizontal water pipe connected with the sewage inlet, as well as tangential water jetting heads, is distributed above the mud collecting pit; the sewage inlet is arranged above the horizontal water pipe and the tangential water jetting heads; at least one riser tube is vertically arranged above the biochemical pool body; the air outlet end of the air supply pipe extends into the lower part of the riser tube, and the air inlet end extends out of the biochemical pool body; the biochemical pool body is sequentially divided into an aerobiotic zone, an oxygen-poor zone, and an anaerobic zone from the top down; the water outlet is arranged at the upper part of the aerobiotic zone; a baffle is arranged in the biochemical pool body close to the water outlet; and the top of the baffle is higher than the water outlet on the pool body. The invention further relates to a treatment method adopting the treatment device. The biochemical treatment device for sewage and the treatment method thereof have the characteristics of simple technology, low cost and energy conservation.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a sewage biochemical treatment device and a treatment method thereof. Background technique [0002] In recent years, my country's urban sewage treatment rate has been continuously increasing, but the problem of water eutrophication caused by nitrogen and phosphorus pollution has not only not been resolved, but has become increasingly serious. Therefore, the aggravation of water eutrophication puts forward strict requirements for the removal of nitrogen and phosphorus. It can be seen that the main contradiction of sewage treatment has changed from the removal of organic pollutants to the removal of nitrogen and phosphorus pollutants. my country's effluent standards for urban sewage treatment plants are getting higher and higher, especially the standards for nitrogen and phosphorus. Therefore, many urban sewage treatment plants that have been built need to be upgraded to...

AI Technical Summary

Problems solved by technology

[0007] The sewage is horizontally tangentially jetted from the bottom, so that the inverted cone at the bottom of the pool acts as a cyclone to sort the sludge microscopically. The power of the horizontal rotation required for the sorting comes from the function of water inflow. When necessary, water needs to be added. Under normal circumstances, it is not enough to rely on the function of water inlet to provide the power of horizontal rotation required for sorting, and it is necessary to add an underwater mechanical stirring propeller to ensure the power of horizontal rotation; in addition, the process adopts The device is not only equipped with a secondary sedimentation tank, but also has an annular skirt to block floating objects and at least one laminated slide filter outlet well or laminated slide filter outlet weir. It directly restricts the wide application of vertical segmented integrated sewage biochemical treatment devices in the field of sewage treatment

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