Improving Solids Handling for Better Performance

Problem

The Cookeville WWTP was experiencing increased maintenance with antiquated blowers, pumps, valves, older sludge press, the lime pasteurization system, and lack of aeration at the basins. Challenges included the dewatering building ceiling height and older electrical systems. The plant wished to produce a drier solid for land applications and reduce hauling costs.

Solution

CTI compared the replacement costs of the lime pasteurization system vs a direct heat drier and, ultimately, the plant elected to stay with a lime pasteurization system. To produce an overall drier solid, CTI’s designs included replacing old blowers with newer more efficient blowers, increasing the number aeration diffusers in one basin, adding a thickener, replacing the older sludge press with a centrifuge, and replacing the older lime pasteurization system with a newer version.

Project Elements

• Provide overall drier solids
• Addition of a thickener
• Replacement of sludge press with a centrifuge
• Replacement of an outdated lime pasteurization system with a new one
• Replacement of older pumps, valves, and electrical equipment

CTI Services

• Design
• Bidding and Award
• Construction Administration
• Resident Project Administration
• As Needed Engineering Services