Two new biogas plants have been recently completed in the US, one in California and the other in Washington. Sacramento-based waste-to-power business Cleanworld has brought online what it claims to be the country’s largest commercial-scale anaerobic digestion system. The system is set to convert 25 tonnes of food and organic waste materials a day into electricity and renewable natural gas, with a further 30,000 tonne-per-year scale-up planned for January. And beef producer Agri Beef has added a biogas plant to its beef processing facility in Toppenish, Washington to help power onsite operations. Methane captured and processed in an anaerobic lagoon has replaced almost 20% of the facility’s natural gas needs.