There is a great interest in biogas as an environmentally friendly alternative to oil and other fossil fuels. However, biogas has been criticized for releasing methane. As a greenhouse gas, methane is 20-25 times worse than carbon dioxide. But new calculations now show that biogas is nevertheless better than fossil fuels as long as the methane emissions are lower than 10-20 percent. It was previously believed that the cut-off point was about 5 percent.
“The margins are thus considerably greater than was previously assumed. Normally methane emissions from biogas are about 2-3 percent,” says Maria Berglund, researcher on Environmental and Energy Systems at Lund University in Sweden.
The point of departure for her dissertation, Biogas production from a systems analytical perspective, has been to study how biogas actually behaves from the point of view of energy and the environment.
Kristina Lindgärde | alfa
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