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DENVER — CH2M HILL’s Spotsylvania County Livingston Composting Facility in Fredericksburg, Va., has earned a Composting Systems Gold Excellence Award from the Solid Waste Association of North America (SWANA).
Contracted by Spotsylvania County, CH2M HILL designed, permitted and constructed the 80 ton-per-day biosolids composting facility, developing sustainable operating solutions to fulfill the existing and future needs of the county.
SWANA awards recognize waste programs and facilities that promote and improve environmentally and economically sound solid waste management via progressive designs, operations and community impact.
“We have been working with Spotsylvania County since 2005, helping the community improve its wastewater residuals and biosolids management program,” said Todd Williams, CH2M HILL Global Technology Leader for Residuals Resource Recovery. “Earning this award is a testament to the County’s vision of sustainability and how CH2M HILL works to deliver innovative solutions.”
The evaluation of wastewater residuals management alternatives in Spotsylvania County determined that not only would the composting alternative be less expensive, but also it would be able to generate a revenue stream, significantly lowering the facility’s projected operating costs. In addition, the project has the added benefit of diverting 100% of the brush collected at the landfill and the county’s convenience centre out of the landfill waste stream and into the compost operation for recycling. Based on the need to expand the small scale composting operation, CH2M HILL designed, permitted and constructed the $15.5 million dollar, 80 ton-per-day biosolids composting facility that is capable of managing all wood wastes and wastewater residuals produced by the county into the foreseeable future.
CH2M HILL used an innovative biofilter system, equipped with a supervisory control and data acquisition (SCADA) control system, to operate at 90% odor removal. CH2M HILL also designed the patented underground aeration system to increase the efficiency of the composting process and reduce costs associated with comparable aboveground piping systems for all dewatered biosolids and shredded brush that is processed through the facility and saving valuable landfill space. This approach saved over $3 million in facility costs through avoiding added building infrastructure and odor control equipment cost and eliminating extra corrosion control, sprinklering and decreasing air handling and odor control systems equipment sizing by 70%.
The resulting Spotsylvania County Livingston Composting Facility, completed in 2010, produces high-quality compost, known as the Livingston’s Blend. The plant has the capacity to recycle 29,250 tons of biosolids annually with additional capacity to double production to 160 tons-per-day in the future.