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...