Design principle of aerator

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Design principle of aerator

Update:10 Feb 2020

In aquaculture production, the use of aerators is becom […]

In aquaculture production, the use of aerators is becoming more and more widespread, but at present some fishermen do not understand its working principle, types and functions, and it appears blind and arbitrary in actual operation. Therefore, you must first understand how it works, its types, and its functions before you can master how to use it in practice.

1.Design principle

The purpose of using aerators is to increase dissolved oxygen to water bodies. This involves both the solubility of oxygen and the rate of dissolution. The former includes ① water temperature, ② water salt content, ③ oxygen partial pressure; the latter includes ④ dissolved oxygen unsaturation, ⑤ water-gas contact area and method, ⑥ water sports conditions. Among them, ① and ② are a stable state of the water body and generally cannot be changed. ④ are the factors we want to change, and they are also a current state of the water body. Therefore, in order to achieve oxygen increase to the water body, it is necessary to directly or indirectly change ③⑤⑥3 factors. In response to this situation, the measures taken when designing the aerator:

(1) Agitate the water body with mechanical parts to promote convection exchange and interface update;

(2) Disperse water into fine mist droplets and spray it into the gas phase to increase the contact area of ​​water and gas;

(3) Inhale through negative pressure to disperse the gas into micro-bubbles and press it into water.

Various types of aerators are designed and manufactured according to these principles. They either take one measure to promote the dissolution of oxygen, or take two or more measures.