Pure carbon dioxide is released by yeast during fermentation. This gas is captured from the fermentation process and liquefied on-site by Yara. It is distributed in liquid form for use in a wide range of food, beverage and industrial markets.

Unlike power station carbon dioxide which is mixed with nitrogen and water vapour in flue gases, carbon dioxide produced by fermentation in a biorefinery is in a pure form. Capturing this carbon dioxide does not require expensive gas-separation technologies and is therefore one of the lowest cost routes to CO₂ capture on an industrial scale.

From 2010, Ensus will capture over 300,000 tonnes of CO₂ each year.

• Plant capturing carbon dioxide from Ensus fermenters