After biogas upgrading, this CO2 source is today typically vented to the atmosphere. However, with Airco’s Bio CO2 recovery, it will be possible also to utilize this value stream.
Capturing Bio CO2 is relatively simple compared to capturing CO2 from many other sources. For instance, the concentration of CO2 in this off-gas is very high and only contains a limited number of unwanted impurities. Therefore, it is easier, cheaper, and more energy-efficient to capture, purify and liquefy.