A2/O biochemical pool structure suitable for sewage treatment plant and capable of being overhauled without cutting off water

Abstract

The invention provides an A < 2 > / O biochemical pool structure suitable for a sewage treatment plant to maintain without cutting off water, the A < 2 > / O biochemical pool structure comprises an anaerobic pool (1), an anoxic pool (2) and an aerobic pool (3), the anaerobic pool (1) and the anoxic pool (2) are arranged side by side, the aerobic pool (3) is divided into N treatment units, the N treatment units are sequentially arranged in the length direction of the anoxic pool (2), the device is characterized in that an overrunning system is arranged at the front end or the tail end of a part of the treatment units, a water inlet and outlet control structure connected with the upstream treatment unit and the downstream treatment unit is arranged on the side wall of the part of the treatment units, and an aerobic tank starting gate (18) connected with the anoxic tank (2) is arranged on the adjacent wall of the first treatment unit (9) and the second treatment unit (10). The requirement for maintenance without cutting off water in the process section can be met, the water outlet effect is hardly affected, the application scene is flexible, and operation is easy and convenient.

Description

technical field [0001] The invention relates to the field of sewage treatment engineering, in particular to an A2 / O biochemical pool structure suitable for continuous maintenance of sewage treatment plants. Background technique [0002] Sewage treatment plants, as one of the important urban infrastructure, according to the "Technical Specifications for the Operation Supervision and Management of Urban Sewage Treatment Plants" (HJ 2038-2014), "Technical Regulations for the Operation, Maintenance and Safety of Urban Sewage Treatment Plants" (CJJ60-2011) and Local regulations require higher and higher requirements for effluent water quality and stable operation. [0003] As the core treatment unit of the sewage treatment plant, the biochemical pool has the following characteristics: 1. It covers a large area and has a long hydraulic retention time. It undertakes the main task of removing pollutants and cannot surpass this process unit; 2. There are many equipments at the bottom...

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Problems solved by technology

[0003] As the core treatment unit of the sewage treatment plant, the biochemical pool has the following characteristics: 1. It covers a large area and has a long hydraulic retention time. It undertakes the main task of removing pollutants and cannot surpass this process unit; 2. There are many equipments at the bottom of the pool. There is the possibility of tank cleaning and maintenance. As the requirements for effluent indicators become more and more stringent, the design of biochemical tanks becomes more and more complicated, and there are more and more equipment at the bottom of the tank. Problems such as the displacement of the odor device and the falling off of the mixer will affect the design water quality, which needs to be repaired immediately, and there are working conditions for cleaning and repairing the tank; 3. There are few groups, considering the comprehensive economy, technology and operation. 4. The load rate is high. With the improvement of the pipeline network in various places and the requirements of environmental protection assessment, the actual load rate of most urban sewage treatment plants in the country is above 70%, which is difficult Suspend production or reduce production for maintenance

Based on the above analysis, the biochemical tank of the sewage plant is an insurmountable unit in the production process, and there is a need for tank cleaning and maintenance. However, it is difficult to obtain the opportunity for production reduction and maintenance from the production and supervision departments of the whole plant. The contradiction between the above two often affects Sewage treatment plant operating units have a greater impact

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