Water and Wastewater Brochure - Energy Systems Group - page 6

4 | Energy Systems Group
Water & Wastewater |
Experience
The Frederick Winchester Service Authority (FWSA) signed a $45 million
energy performance contract with Energy Systems Group (ESG) for the design
and construction of comprehensive energy efficiency and infrastructure
improvements at the Opequon Water Reclamation Facility. This 12.6 million
gallon per day enhanced nutrient removal facility has very strict nitrogen and
phosphorus removal requirements necessary to help preserve the well-being of
the Chesapeake Bay. This project is anticipated to achieve operational savings
that will cover not only the cost of the project, but create a revenue stream for
FWSA, that will stabilize rates for its customers and promote existing and future
economic development in the Winchester City and Frederick County area.
The centerpiece of the FWSA project is the construction of a Green Energy Facility,
which will process municipal sludge and high-strength organic waste to produce
methane gas, a renewable fuel, through the process of anaerobic co-digestion.
This methane gas will be utilized to generate up to 848 kilowatts of electricity
that, at start-up, will meet more than 50 percent of the treatment plant’s electrical
needs. This facility also includes a new sludge dewatering process that reduces the
use of chemicals and significantly reduces the amount of biosolids hauled to the
Regional Landfill for final disposal, by approximately 50 percent.
The Green Energy Facility will also harvest phosphorus from the wastewater
stream, a rare element that is an essential ingredient for fertilizer and crop
production. The facility is scheduled to be operational in 2016.
Treatment Infrastructure Renewal
• Anaerobic digestion: Three (3) 1.25 million gallon digesters, 13,000 sf control building
housing switchgear, lab, boilers, heat exchangers, grinders, pumps, compressors
• Dewatering: Gravity belt thickeners, belt filter presses, polymer feed pumps, progressive
cavity pumps and associated electrical
• Controls: SCADA control system upgrade
• Electrical: New primary 12.5 kV switchgear unit, 800 kW emergency power system
interconnected to cogeneration, net metering/grid paralleling capability
• Aeration: Replace Four (4) 450hp multistage blowers with Four (4) 200hp turbo blowers,
new electrical, fine bubble diffusers, piping and controls
Green Energy & Resource Recovery
• 848 kW electric cogeneration with biogas conditioning system
• High strength food waste and FOG receiving facility with segregated waste storage
• Ostara Pearl® phosphorus nutrient recovery system
Frederick-Winchester Service Authority
Winchester, Virginia
“The Green Energy Facility will
not only provide food processing
companies with local, sustainable,
cost-effective, and environmentally-
sound waste disposal solutions, it
will also significantly promote local
economic growth by creating jobs
and attracting new businesses and
revenue streams to the area.”
Jesse Moffett,
FWSA Executive Director
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