Grand Island Independent: The Nebraska State Fair is a lot of fun and a lot of food. Make that a lot of deep-fried food. Even the most health-conscious fair-goer is tempted by the many deep-fried food fancies offered at the fair. But that’s all right with Robert Byrnes, owner of Nebraska Renewable Energy Systems. Robert Byrnes, owner of Nebraska Renewable Energy Systems, pours a jug of used fryer oil through a filter after collecting the oil from food vendors at the Nebraska State Fair in Grand …