Moores Creek Wastewater Treatment Plant

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Moores Creek Wastewater Treatment Plant
Summary
Type wastewater treatment
Owner RWSA
Built late 1950s
Capacity 15 MGD
The Moores Creek Wastewater Treatment Plant treats wastewater at a design flow of 15.0 million gallons per day (MGD) with a discharge to Moores Creek.

Contents

Construction history

The plant was built in two phases. The first section was built in the late 1950s and "included a grit basin, grit decanting bed, pre-aeration basins, intermediate, primary and final clarifiers, primary and secondary trickling filters, sludge drying beds, and primary and secondary digesters"[1].

The second phase consisted of an upgrade on the south side of Moores Creek in 1981, and "incorporated preliminary screening and grit removal, daily flow equalization, primary clarification, biological treatment, secondary clarification, chlorination and tertiary settling in flocculation and settling basins, as well as in final clarifiers." [1].

"In 1988, the aeration basins, which provide biological treatment, were retrofitted with limited modifications in an attempt to create an initial anoxic zone. Due to the fact that the anoxic zone is mixed using diffused aeration, the existing facility configuration can not reliably provide significant biological nutrient removal. Solids are thickened, anaerobically digested, and compressed through filter press equipment before disposal." [1].

Expansion

The engineering firm Hazen and Sawyer is designing for an average design flow of 15 MGD and a peak flow of 37.5 MGD with provisions for possible future expansion to a design capacity of 20 MGD and a peak flow of 50 MGD. As of November 1 2009, the work on the expansion project is 13.5% complete[2].

Notes

  1. ↑ 1.0 1.1 1.2 DEQ Project Site for Moores Creek
  2. ↑ RWSA Engineering Staff. Report on On-Going Projects. Issue brief. Rivanna Water and Sewer Authority, 24 Nov. 2009. Web. 23 Nov. 2009. <http://www.rivanna.org/documents/agendas/agenda_nov24_2009_doc6c.pdf>.

External links

Project description on Department of Environmental Quality's website

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