Further, Gasum said it is able to provide bio-LNG bunkering services to all shipping companies that have vessels running on liquefied natural gas as LNG and bio-LNG are fully interchangeable. They can also be mixed at any ratio. Biogas production is part of the circular economy, as biogas is produced from waste feedstocks such as biowaste, sewage sludge, manure and other industrial and agricultural side streams. The organic matter generated as a by-product of biogas production is high in nutrient content.