Also called aerification, it is the process of bringing water and air into close contact in order to remove dissolved gases, such as carbon dioxide, and oxidize dissolved metals such as iron. It can also be used to remove volatile organic chemicals (VOC) in the water. Aeration is often the first major process at the treatment plant. During aeration, constituents are removed or modified before they can interfere with the treatment processes. Also, it is essential to supply soil and roots with air or oxygen.
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