Principle of aeration in sewage treatment

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Aeration is a means to make air and water come into strong contact. Its purpose is to dissolve oxygen in the air in the water, or to remove unwanted gases and volatile substances from the water into the air. In other words, it is a means to promote the exchange of substances between gas and liquid. It also has other important functions such as mixing and stirring.

The oxygen in the air is transferred to the water by aeration, and the oxygen is transferred from the gas phase to the liquid phase by mass transfer. This theory of mass transfer and diffusion is widely used by Lewis and Whitman.


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