(St. Paul, MN) Minnesota is looking to add a new energy source to the State's power grid. Leftovers. The energy source is called called an Anaerobic Digestor, which processes food and yard waste and turns it into fuel, similar to a stomach. “Think about it like your stomach,” said Shakopee-based Dem-Con President Bill Keegan. “You put food in and you get liquids, gases and