Aeration

Often the first major process in a treatment plant, aeration brings water and air in close contact to remove any dissolved gases and oxidizes dissolved metals. During the aeration process, these unwanted constituents are removed or modified before they interfere with the rest of the treatment process. Aeration can be achieved by exposing thin sheets of water to the air or by injecting small bubbles of air and letting them rise up a body of water. The turbulence of aeration physically removes dissolved gases from the water so that they could escape into the air. Oxidation will also occur helping remove dissolved metal. They will become particles easily removed by filtration after that.