The company behind a refinery to turn fat and grease into renewable fuels says the pilot plant could soon offer another local market for Alberta farmers and cut greenhouse gas emissions at the same time. Edmonton-based SBI BioEnergy is building the approximately $10-million mini-refinery at the Edmonton Research Park to demonstrate proprietary technology that turns vegetable oils, animal fats and tall oil — a by-product of the pulp and paper industry — into renewable diesel a