The spent grain or “mash” produced in our mash tun is a source of renewable/sustainable energy. It ends up at a local cattle farm’s biodigester along with other organic wastes from various industries, where the grains are converted into methane gas. The gas is burned in an electric generator that feeds energy directly to the electrical grid. On top of that, the leftover material in the digestor can be used as digestate to fertilize crops around the farm that can one day become beer again! We also use this spent grain to make delicious, all natural and organic dog treats for your four-legged bestie!