'Poop to power' program turns pig manure into sustainable energy
Monday, January 9, 2012 - 16:00
in Earth & Climate
The nearly 9,000 hogs at Loyd Ray Farms in Yadkin County, N.C., produce 400,000 gallons of manure every week. Since the waste had too high a nitrogen content to be used as fertilizer, owner Loyd Bryant used to pump that waste into a local lagoon, where it released methane, ammonia and "an unholy stink," according to the Los Angeles Times.