Pig Poop Powers North Carolina Farm

Scaling up waste-to-energy technology could transform the hog farming industry. 

In the heart of North Carolina’s bucolic wine country, east of the Great Smoky Mountains, lies Loyd Ray Farms — a factory farm that turns pig poop into energy. From the road, the sprawling site looks like a typical concentrated animal feeding operation, or CAFO, with nine elongated metal barns housing nearly 9,000 hogs and an open lagoon that stores liquefied manure. But next to the lagoon is a bizarre basin covered by an inflated tarp: the biodigester. Every week, this swollen struc...

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