A $100-million utility-scale biogas facility began construction in mid-December in North Carolina. The facility is the first in a planned pipeline of large-scale anaerobic digestion and biogas treatment facilities developed by Carbon Cycle Energy (C2e), renewable energy development company based in Boulder, Colo.

Upon completion in late 2017, the biogas facility, known as C2e Renewables NC, will process in excess of 750,000 tons of organic waste per year. It will produce enough fuel annually to generate approximately 290,000 megawatthours of electricity.

The facility will rely in part on waste from nearby pig farms.The facility will rely in part on waste from nearby pig farms.C2e says it has signed contracts to supply all of the plant's output of biomethane to Duke Energy and a second, unnamed company.

At full capacity, the plant will generate 6,500 dekatherms of biomethane per day, equivalent to roughly 50,000 gallons of diesel fuel, the company says. C2e has secured access to a variety of organic waste streams, comprised of manure and other agricultural waste as well as industrial food processing waste. These will be converted by anaerobic digesters into raw biogas, upgraded on site, and injected directly into the natural gas pipeline system.

C2e chose North Carolina's Duplin County as the location for its first project based on its proximity to a natural gas pipeline and its access to large volumes of agricultural and food waste. With more than 530 hog operations, Duplin County has one of the highest concentrations of hog farms in the world, the company says.

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