Submersible aerators are used at wastewater treatment facilities to aerate industrial wastewater and other water that needs treating. The principal function of the aerators is to produce tiny bubbles in the liquid that requires to be treated. The air required to produce the bubbles is drawn from above the surface of the liquid by furiously mixing air and liquid and then discharged outside. The aerated water will contain a high amount of dissolved oxygen. This process brings air and water into close contact thereby removing any organic volatile chemicals.