Sewage treatment aeration tank

Abstract

The invention discloses a sewage treatment aeration tank which comprises a first aeration tank and a second aeration tank; a fixed plate is fixedly mounted at the position, close to the lower portion,of the outer surface of the other side of the first aeration tank, a motor is fixedly mounted on the outer surface of the upper end of the fixed plate, and a first belt pulley is fixedly mounted on the outer surface of one side of the motor; the first belt pulley is connected with a second belt pulley through a transmission belt, a first stirring shaft and a second stirring shaft are fixedly mounted on the outer surfaces of one sides of the first belt pulley and the second belt pulley respectively, a fan is fixedly mounted on the outer surface of the upper end of the first aeration tank, anda first air inlet pipe is fixedly mounted on the outer surface of the front end of the fan. The key point of the invention is that after sewage and sludge are stirred and mixed, an exhaust pipe outputs pressure air bubbles through exhaust holes, and the sludge and the sewage are simultaneously treated by adopting a perforated aeration method, so that the floating time of the bubbles is greatly prolonged, the oxygen utilization rate is improved, the treatment efficiency is improved and the operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an aeration tank for sewage treatment. Background technique [0002] The aeration tank is a biochemical reactor designed according to the characteristics of microorganisms. The degree of degradation of organic pollutants mainly depends on the aeration reaction conditions designed by people. The aeration tank uses activated sludge method for sewage treatment, and a certain amount of sewage is provided in the tank. The residence time meets the oxygen required by aerobic microorganisms and the mixing conditions of full contact between sewage and activated sludge, so as to achieve the purpose of removing VOC and other pollutants by oxidation. [0003] In the prior art, the Chinese invention patent application number is 201610090165.1, which discloses a cycle purification system for odorous waste gas in an aeration tank in sewage treatment and its process. When the odorous ga...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned existing sewage treatment aeration tank still has the following disadvantages during use: it can only carry out aeration treatment for sewage, but cannot treat the sludge and sewage in the aeration tank at the same time; at the same time, its oxygen The utilization rate is low, when the perforated aeration is used, the oxygen utilization rate is less than 7%, and the oxygen utilization rate is only 20% to 30% when the microporous aeration is used.

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