To a visitor, the hog houses down a dusty dirt road outside Magnolia, North Carolina look like any other hog houses. Here in Duplin County, there are low-slung buildings like this one around every bend, filled with hundreds of thousands of hogs. But this facility is different — just how different can be found down the hill behind the building. Manure, flowing from the hog house, falls out of a pipe and into an open-air cement tank. From here, it goes to a much larger, circular, blue tank called a digestor. “It’s basically an indoor lagoon, is what it is,” says Wiley Williams, the operations manager for Revolution Energy Solutions. On a typical farm, hog manure goes into a lagoon, separates, and then gets sprayed out onto fields. Here, Revolution Energy Solutions takes the manure from ten hog houses and sends it to two digestors. The methane is then separated, captured and pumped through underground pipes a few hundred yards away to a circular, inflatable storage facility. There, it
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