Wastewater Upgrade Facts

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*Interested in bidding on the Wastewater Plant Upgrade project? Contact CDM Smith in Nashville for more information at (615) 320 – 3161

The City of Franklin operates one of the best performing wastewater treatment facilities in the state.  The City is currently working on an upgrade and expansion to the plant based on science and extensive modeling of its impact on the Harpeth River and designed to meet the growing needs of our community for the next 30+ years.  The upgrade and expansion will bring enhanced, state-of-the-art treatment technology designed to further REDUCE nutrient discharge into the Harpeth River.  In 2017 the Tennessee Department of Environment and Conservation issued a new discharge permit to the city, and Franklin was also approved for a 100 million State Revolving Fund loan to help pay for the treatment plant enhancements, which will save Franklin rate payers more than 30 million dollars over the life of the loan.

The following are information sheets about various process upgrades

Anaerobic Digestion

Biological Nutrient Removal (BNR) Basins

Clarifiers and Influent Clarifier Systems

Combined Heat and Power Systems

Deep Bed Filters

Flow Equalization System

Fats Oils and Grease (FOG) Receiving Station

Headworks and Odor Control

Reuse Pumps


Thermal Hydrolysis

Traveling Bed Filters

UV Disinfection

Waste Activated Sludge (WAS) Storage Tank