Knowledge Base

The process of CO₂ liquefaction starts with the CO₂ stream separated during biogas upgrading, which is then compressed, cooled, and purified to the point where it condenses into a liquid. Achieving food-grade quality requires additional purification steps to remove trace impurities and contaminants, ensuring the liquid CO₂ meets the standards required for use in food and beverage applications. Once liquefied, the CO₂ is stored in dedicated pressurized, insulated tanks before being transported off-site to customers in the food and beverage, horticulture, or industrial gas sectors. At HoSt’s Lorca Bioenergy project, this CO₂ liquefaction process is integrated directly alongside the biogas upgrading systems, supplied by Bright Renewables, so that biomethane production and CO₂ liquefaction operate as a single, coordinated process on-site.