Improved aeration settling tank

Abstract

The invention belongs to waste water treatment equipment, especially relating to an improved aeration settling tank. The improved aeration settling tank comprises a tank body, a water inlet pipe arranged in front of the side wall of the tank body, a slope tilting downwards from end to beginning and arranged on the bottom of the tank body, an aerator arranged on the bottom of the tank, a water tank arranged at the inner side of a tank wall on the tail end of the tank body and inclined plates distributed at interval and in parallel in front of the water tank; the front side and the back side of the inclined plate are respectively provided with a first partition wall and a second partition wall; the first partition wall and the second partition wall divide the tank body into an aerobic zone, a pre-settling zone and a clean water zone which are arranged from front to back at interval; the pre-settling zone is communicated with the aerobic zone through water inlet holes and sludge returning holes arranged on the first partition wall; a perforated water collector pipe is arranged in parallel on the upper portion of the second partition wall; the inlet of the perforated water collector pipe is arranged in the pre-settling zone above the inclined plate, and the outlet thereof is arranged in the clean water zone; a sludge pipe is arranged on the bottom of the tail end of the clean water zone; the bottom of the water tank is communicated with the exterior of a water pipe. The improved aeration settling tank overcomes the technical defect that the degradation rate of pollutants is low in the prior art and has the advantages of good sludge settling effect, high degradation rate of the pollutants and so on.

Description

technical field [0001] The invention belongs to sewage treatment equipment, in particular to an improved aeration sedimentation tank. Background technique [0002] In recent years, although sewage treatment technologies have emerged, biochemical methods are still widely used as a cost-effective water treatment method. Aerobic biological treatment is one of the biochemical treatment methods. The traditional aerobic biological treatment consists of an aeration tank and a sedimentation tank. The aeration tank is the main equipment of the aerobic biological treatment. There are a large number of aerobic microorganisms in the aeration tank to form the active sewage. Sludge, aerobic sludge degrades organic matter in wastewater in the presence of oxygen, and purifies water to complete the wastewater treatment process. The main function of the sedimentation tank is to separate mud and water by gravity. Part of the separated sludge is returned to the aeration tank through the return...

AI Technical Summary

Problems solved by technology

Traditional aerobic treatment equipment has the following disadvantages: 1. A sludge return system needs to be installed, which consumes a lot of energy and requires a high investment

2. The sedimentation tank needs to be set up separately, which increases the floor area and investment cost of the system

3. The operation is cumbersome and difficult to control, and improper operation can easily have a major impact on the stable operation of the system

[0005] Since the inclined plate is directly installed in the aeration tank and there is no obvious division between the aeration part, it is difficult for the sludge to settle due to the disturbance of the water flow in the aeration tank, and only a small amount of sludge can be refluxed, and the effluent still contains a large amount of sludge, which needs to be aerated again The rear end of the aeration tank is connected to the sedimentation tank to complete the separation of mud and water. Like the traditional aerobic treatment system, it has the problems of large area and high investment costs; at the same time, the rear part of the aeration tank is easy to form a dead water area, and the sludge is easy to deposit at the bottom. Sludge will be anaerobically fermented and then float up, seriously affecting the water outlet effect

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