At the heart of a truly circular economy, Greenville Energy operates one of Northern Ireland’s most advanced biorefineries, transforming a wide range of organic waste – from dairy and agriculture to food and beverage by-products – into valuable renewable resources.

Through anaerobic digestion, these materials are converted into biogas, which is upgraded into biomethane and bio-LNG to power energy-intensive industries and transport fleets. The process also captures and purifies liquid CO₂ for use in food, industrial, and dry ice applications. By recycling nutrients as digestate fertiliser and using renewable energy to grow animal feed, the system supports sustainable milk and beef production, with over 8 million litres of milk delivered annually. All transport is powered by the biogas it helps create, closing the loop on waste, energy, and food production.