How to make bio-LNG?
Bio-LNG is liquefied methane (CH4) with a temperature of -162oC. The methane comes from biogas, which is produced by the anaerobic digestion of organic waste. This biogas must be treated to seperate the methane from the carbon dioxide (CO2) and some critical contaminants. This step is called upgrading and is complex. The methane purity must be very high before the methane can be liquefied.