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•Case Study: Squeeze Play - How Nashville Gained Savings In Dewatering Sludge

Wastewater treatment plant managers often modify their process or infrastructure to achieve regulatory compliance and more cost-effective operations. One example involved the Central Wastewater Treatment Plant (WWTP) in Nashville, Tennessee where the Solids Processing Team, led by Joe White, set out to increase the feed solids to their belt presses. The approach promised to deliver significant costs savings by reducing the volume of wet cake hauled to landfills since the utility ceased using incineration in 1994.

Central WWTP has been the workhorse for the Nashville utility since it entered service in 1958. The city encompassed only 22 square miles at the time and had a collection system that totaled 440 miles of lines. The earliest segments of the system, some already a century old, included combination sewers with all the contingent challenges during rain events. Today, the plant's rating for rainy weather still reflects the impact of runoff. It stands at 330-MGD during peak wet weather versus the 250-MGD rating for peak dry weather flow.

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•Case Study: Squeeze Play - How Nashville Gained Savings In Dewatering Sludge

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