Butor Group, an agricultural company near Krakow that produces milk, alcohol and oil, has been turning its attention to the production of biogas since the early 2000s. It currently owns two plants powered by manure, agricultural waste and decoction from the distillery, producing a total of 1MW of electricity and heat. The heat supplies the distillery, while the digestate is used in the fields. The company's success lies precisely in its ability to exploit and reuse all the waste from its processes, creating a virtuous circle.