The Wastewater Treatment Plant is located at 725 Industrial Drive. It sits on 125 acres and was originally built in 1983 as a biological and natural treatment process. Due to the rapid growth of the city, the treatment plant was modified and expanded in 1988 and again in 2002. The process now employed is called an oxidation ditch.
The oxidation ditch takes the wastewater and mixes it with various amounts of oxygen, naturally produced sludge and bacteria. During this mixing process, the bacterium uses the oxygen to reproduce and then feeds on the sludge and numerous other pollutants, effectively removing them from the wastewater.
The treated wastewater leaves the ditch and flows into two clarifiers, which separate the solids from the wastewater. Afterwards, the separated sludge is either sent back to the oxidation ditch for further treatment or is deposited into a six acre storage lagoon.
UV Disinfection and Discharge
The wastewater then flows through a UV disinfection chamber and is then discharged to Frey Creek or used through a spray irrigation system. The State of Tennessee presently permits the city to discharge 1.1 million gallons per day to Frey Creek with an additional permitted discharge of 300,000 gallons per day through the original plant’s spray irrigation system.