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The role of aerator in the sewage treatment process

The role of aerator in the sewage treatment process

Aug 06, 2019

In the process of sewage treatment, the biological treatment method can be divided into aerobic method and anaerobic method according to the aerobic conditions of the participating microorganisms.

Generally, the aerobic method is more suitable for lower concentrations of sewage, such as domestic sewage. The oxygen pressure method is more suitable for treating sludge and higher concentration sewage.


In the aerobic biological treatment process, the aerator is generally used to replenish the treatment tank to increase the oxygen content in the treatment tank, so that the microorganisms can fully act on the sewage. In the aeration tank of the sewage treatment biochemical system, the oxygenation efficiency is related to the growth of aerobic microorganisms, and the supply of dissolved oxygen is determined according to the quantity, biological characteristics and concentration of aerobic microorganisms. This will achieve a good state of degrading organic matter.


The type of aeration can be roughly classified, one type of blast aeration, and the other type is mechanical aeration. Aeration gas is an aeration method in which air bubbles are introduced into the water by using an aerator diffuser or a diffuser. The microbubbles of the product can better contact with sewage and sludge, and are better for the growth of microorganisms.

The microbubble aerator is also called a microporous aerator, and is made of a porous material in the form of a diffusion plate, a diffusion tube, and a diffusion cover. According to the installed type, it can be divided into a lifting microporous aerator and a fixed microporous aerator.


Another type of pipe is directly aerated in the form of a pipe.

Tubular diaphragm microporous aeration tube. The pipe made of ABS or UPVC is used as a gas pipe, and the pipe wall is provided with a vent hole, and the outer circumference of the gas pipe is covered with a membrane made of synthetic rubber, and the diaphragm is fixed on the pipe by a metal clip. Uniformly distributed perforations are produced by laser or the like on the synthetic rubber film.

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