The Gallatin Wastewater Treatment Plant has an organic treatment capacity of 12.5 million gallons per day. The plant is also capable of being operated in "Storm Mode" with a resulting hydraulic capacity in excess of 30 million gallons per day, while meeting all NPDES effluent limitations. This facility consists of a headworks building (with three large rotary screens), two oxidation ditches, four large diameter clarifiers, four polishing clarifiers, an ultraviolet disinfection system, a 1,100 foot long, 42 inch diameter ductile iron outfall line, six digesters, a biosolids processing facility (three centrifuges with pumps and polymer feed system, and a lime stabilization system), and an operations building. The plant features a state of the art SCADA system which provides a complete system integration for the control and operation of the plant.

The new Gallatin Wastewater Treatment Plant was featured in the December, 2012 issue of the Treatment Plant Operator magazine.

UV Disinfection - Zapping Bacteria with Light

One of the key features of our recently completed construction at the wastewater treatment plant is a system that uses ultraviolet light to help disinfect wastewater. At the end of the wastewater treatment process, the treated effluent passes through a series of special light bulbs where it is exposed to ultraviolet light before being discharged into Old Hickory Lake. The intense ultraviolet light kills the bacteria.

Plant Processes

Above is a drawing of the Gallatin Wastewater Treatment Plant. View brief descriptions of the processes below:

• Headworks Building
• Digesters
• Clarifiers
• Polishing Clarifiers
• Oxidation Ditches
• UV Disinfection Building
• Biosolids Buildings
• Administration Offices

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