Waste Water Treatment Plants

Aeration is the process of adding air into wastewater to allow aerobic bio-degradation of the pollutant components. Unlike chemical treatment, aeration enhances biological treatment, uses micro-organisms that occur naturally in wastewater to degrade wastewater contaminants.

Aeration is the first major process at the treatment plant.

Constituents are removed or modified before they can interfere with the treatment processes. 

The efficiency of aeration depends on the amount of surface contact between air and water, which is controlled primarily by the size of the air bubble.

Constituents commonly affected by aeration are:

    • VOCs, such as benzene, trichloroethylene, dichloroethylene, and perchloroethylene
    • Ammonia, Hydrogen sulfide stripping
    • Chlorine
    • Carbon dioxide,
    • Methane, Iron and Manganese

Aeration brings water and air in close contact in order to either add a gas such as oxygen and also to remove dissolved gases (such as carbon dioxide) and oxidizes dissolved metals such as iron, hydrogen sulfide, and volatile organic chemicals (VOCs).