West Knox Utility District Daugherty Water Treatment Plant Expansion (8 MGD), Knoxville, TN
Prior to this expansion project, the 2 MGD Daugherty Water Treatment Plant utilized conventional turbidity removal facilities (coagulation, flocculation, sedimentation, filtration) to treat surface water from Melton Hill Lake. GRW provided planning, design, and construction phase services for the 8 MGD expansion with design considerations for a future expansion to 16 MGD. Membrane filtration technology with enhanced flocculation was selected for the filtration treatment due to the limited space on the site.
Key improvements included:
- New 8 MGD membrane treatment facilities with required supporting systems
- Conversion of the existing sedimentation basins to enhanced flocculation basins and construction of new chemical storage and feed facilities
- New on-site sodium hypochlorite generation facilities (two sodium hypochlorite generators, each capable of producing 450 pounds per day chlorine equivalent as 6,750 gallons per day 0.8% sodium hypochlorite)
- Upgraded plant control and SCADA systems
- Raw water and high service pump improvements
- 30,700 LF of 30”, 24” and 16” ductile iron potable water transmission mains
- 160 LF of 36” ball joint ductile iron raw water main in the lake and constructed using a barge and crane