Water Treatment "Part 14": Other methods of aeration!

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Spray aerator:

Low concentrations of volatile pollutants, particularly radon, are eliminated by spray aeration. The efficiency varies depending on the kind of gas. This procedure ranges from 40 to 50% in its efficacy in removing carbon dioxide; while the effectiveness of removing methane varies between 80% and 90%. Spray aerators can be installed right above the filters, breaking up the water into little droplets and creating a broad contact area where the water and air will touch.


Aerated water coming from a faucet.

Aeration towers:

Aeration towers are formed of a cylinder made of steel or synthetic material and filled with a specific filling material; its primary function is to oxygenate water. Over the filling material in the upper portion of the tower, water is spread, and it then drips from the surface. A large contact surface between water and air is created to transfer gas as a result of the flow of water on the filling medium. Natural ventilation or a fan can be utilized to replenish the air, and if a fan is employed, flows that are parallel to or the opposite of the present flow may be produced inside the tower. The efficiency of this process in removing gases can reach 95 percent.
The aeration towers are prone to clogging if there is iron in the groundwater because it oxidizes and precipitates, causing pollution that must be removed by backwashing the towers.

References:

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