Primary settling tank-transformed biological alternating tank structure and sewage treatment method of primary settling tank

Abstract

The embodiment of the invention discloses a primary settling tank-transformed biological alternating tank structure. The structure comprises a round radial flow type primary settling tank body, wherein the round radial flow type primary settling tank body comprises a tank region and also comprises a stirring push flow device and an aerating device, wherein the tank region is mainly formed by enclosing the tank bottom by using the tank wall; the stirring push flow device is used for making active sludge in the tank region maintain the suspension state under the anaerobic or oxygen-deficient environment; the aerating device is used for enabling the tank region to form an aerobic environment; the tank region comprises at least four groups of reaction regions; each group of reaction region takes the shape of a fan; the reaction regions are arranged adjacent to each other; and the stirring push flow device and the aerating device are connected to the at least four groups of reaction regions respectively. The embodiment of the invention also discloses a sewage treatment method of the primary settling tank. According to the invention, the primary settling tank in a large number of original sewage treatment plants is transformed and utilized and the transformation cost is low; the structure is arranged reasonably, various working conditions can be controlled according to the water quality condition, and the functions of removing nitrogen and phosphorus are achieved; the treatment effect is stable; and the method is easy to implement.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a structure of a biological alternating pool transformed from a primary sedimentation tank and a sewage treatment method thereof. Background technique [0002] The primary sedimentation tank has the function of removing suspended pollutants in wastewater. After the wastewater is treated by the primary sedimentation tank, it can remove about 50% of the suspended matter and 20% of the BOD. Calculated by removing the unit mass of BOD or suspended matter, the primary sedimentation tank is the most economical purification step. For domestic sewage and Industrial sewage with high suspended solids can be pretreated by primary sedimentation tanks. The main functions of the primary sedimentation tank are as follows. [0003] 1. Remove suspended solids and reduce the load on subsequent treatment facilities. [0004] 2. Some wastewater treatment process systems return part of the sludge f...

AI Technical Summary

Problems solved by technology

[0005] The existing transformation of the primary sedimentation tank is not only complex in engineering, but also has certain limitations in its practical application in terms of its treatment efficiency and energy saving. This limitation is mainly reflected in:

[0006] 1. The traditional primary sedimentation tank does not have the function of biochemical treatment, for example: it does not have the function of nitrogen and phosphorus removal

[0007] 2. In order to ensure a better biochemical treatment effect, the structure usually occupies a large area and the cost of civil construction is high. If the function of denitrification and phosphorus removal is required, a new pool needs to be added

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