Carbon Cycle Energy, a Boulder company also known as C2e, plans to build a processing facility in North Carolina to turn swine and poultry waste and other biomass materials into biogas for one of the nation's largest power utilities.

Charlotte-based Duke Energy (NYSE: DUK) -- which supplies power to more than 7 million customers in the Southeast and Midwest -- has signed agreements to buy biogas from C2e's planned biogas project.

Duke confirms it will use what is called “directed biogas” from C2e's to produce some power at four of its North Carolina plants.

The amount of power produced by the renewable gas will still be relatively small. But it will put Duke on the path to meet state renewable energy requirements for power production from the animal wastes.

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