Method for realizing vertical flow of A20 process of sewage treatment and structure thereof

Abstract

The invention relates to a method for realizing vertical flow of A20 process of sewage treatment and a structure thereof. The structure consists of an anoxic area, an anaerobic area, an aerobic area and a sediment area in accordance with three large stereostructure of concentric circle. A backflow seam is arranged on the outer wall of the anoxic area, and a lift agitator and an aerating apparatus are further arranged. Pools adopting the normal A20 process are organically integrated by a stereo way to realize backflow of water and active sludge through the lift agitator and the backflow seam, thereby realizing circulation of water and active sludge in anoxic, anaerobic, aerobic processes, achieving the purpose of removing BOD5, ammonia nitrogen, total nitrogen and total phosphorus without configuring two sets of reflux pumps the same as the normal A20 process and solving the problems that a plurality of pools of the normal A20 process are arranged, the structure is loose with large occupied area and a plurality of backflow lines and valves are needed. Sewage treatment engineering medium and small water yields can be very flexibly used, thereby improving the effluent quality and enlarging the application range of the A20 process.

Description

technical field [0001] The invention relates to a sewage treatment and filtration process, in particular to a vertical flow A 2 O process, the conventional A 2 The individual process structures of the O process are organically integrated in a reaction tank, and the conventional advective A 2 The method and structure for changing the O process to the vertical flow method. Background technique [0002] Sewage treatment is divided into two types: organic pollutant sewage treatment and inorganic pollutant sewage treatment. The main removal of organic pollutant sewage treatment is BOD in water. 5 , ammonia nitrogen, total nitrogen, total phosphorus and other organic pollutants, and sewage often contains these pollutants exceeding the standard at the same time. [0003] Among these pollutants, BOD 5 and ammonia nitrogen need to be absorbed and degraded by the activated sludge in the water by an aerobic process; the total nitrogen needs to be removed by denitrification in the a...

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Problems solved by technology

[0004] This kind of A 2 The O process is currently widely used in municipal sewage plants with large water volumes, and the effect is also good. However, in some environments with small water volumes and limited sewage treatment areas, due to the large number of structures, scattered structures, and large footprints , more equipment (mixer, reflux pump), and more external pipelines have become disadvantages, which limit the application of this process; achieve A 2 The process of O process treatment effect

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