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What is (why) aeration in water treatment? Purpose of aeration in water treatment?

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What is (why) aeration in water treatment? Purpose of aeration in water treatment?

Aeration (aerator) is used in aerobic tank to increase oxygen concentration in waste water treatment, to promote microbial metabolism and decomposition of organic pollutants and decrease the standard of sewage BOD.

Function of aeration in water treatment?

There are two main functions for aeration in water treatment. One is transfer oxygen into sewage. The other is stirring effect.

Transfer oxygen into sewage: adjust dissolved oxygen concentration to meet the needs of microbial metabolism under different oxygen concentrations (AO, Aerobic)

Stirring effect: When the aerator is working, bubble goes up and it takes water to lift which causes the sewage stirring circularly. It can prevent sludge to deposit, and make activated sludge, organism and organic distribute even in the whole sewage tank. It creates proper environment to promote organic degradation. Otherwise, sludge settling and local hypoxia are not good for waste degradation.

We focus on fine bubble aeration. If you have any question or project calculation for aerobic tank or aerator, please feel free to contact with us.