After screening and grit removal wastewater still contains organic residues. Aeration incorporates oxygen into the wastewater, which stimulates aerobic bacteria to breakdown the organic matter.
Diffused aerators are extremely efficient. They are placed at the bottom of the tank and release a continuous supply of bubbles into the wastewater. As they work their way to the surface, air from inside the bubbles dissolves into the wastewater and provides a continuous supply of oxygen. Diffused aerators are designed to distribute oxygen evenly throughout the entire tank.