Biomethanisation of CO2 in anaerobic digestion plants

A hybrid anaerobic digestion process will use hydrogen made from renewable sources like wind and solar power to convert waste CO₂ into biomethane at more than 95% purity. This matters because current biogas upgrading methods lose methane to the atmosphere and rely on energy-intensive separation techniques. The new process captures carbon that would otherwise be wasted and turns it directly into a fuel that can be stored, used to balance the electricity grid, or power vehicles. It is designed to be more environmentally friendly and sustainable than existing approaches, with reduced process loss of methane. If the research succeeds, the water industry could integrate the system into its existing infrastructure, making use of process heat and other by-products. A second target is smaller-scale farm operations, where waste biomass is abundant but suitable upgrading plant is scarce. The result would be a cleaner, more efficient way to turn organic waste into a versatile fuel, quietly improving how energy grids and transport systems operate without requiring entirely new infrastructure.