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The main method used for aeration of wastewater from wastewater containing mixed liquor is – air diffusion system.

system of air diffusion

In this system, wastewater is aerated by blowing compressed air is used by broadcasters porous. Broadcasters are porous tubes or plates or porous quartz aluminum oxide, which is released into the air as fine bubbles. tube diffusers are suspended along one side of the tank, while the diffuser plate placed in the bottom of the aeration tank. treatment systems wastewater commonly used in practice.

The tiles are flat or 30 cm x 30 cm x 25 cm thick tiles shaped or dome 10 cm to 17.5 cm in diameter. These are the most popular these days. In these systems, for about 1/10th of the tank, the diffuser has a surface.

Two agreements diffuser tiles are generally adopted:

(I) and the method of Groove Ride

In this sense, aeration soil wastewater consists of a series of ridges and furrows, usually placed lengthwise, with the speakers provided in the grooves and the main air pipes through small air. The air is released as fine bubbles, which rise and give effect to the wastewater, which flows in one direction perpendicular. Thus, the traces of the air path in the gas wastewater.

(Ii) the spiral flow method:

In this regard, the speakers are placed on one side of the tank floor. The corners of the tank are chamfered, so that for the air bubbles passing by are deflected. longitudinal displacement of wastewater produced a helix. This sheds a certain amount of air through the tank and down. It also gives a greater distance of travel of air bubbles and wastewater and allows a greater absorption of atmospheric oxygen on the surface of the wastewater during aeration. systems of wastewater treatment of this type require broadcasters fewer and less the amount of air tablet. As a result, this method is less expensive. He, however, defaults, and it is the formation of pockets of stagnation, which interferes with the method of aeration.

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