Biogas gives 95% CO2 reduction
February 18, 2010 § Leave a comment
Biogas derived from sewage sludge or refuse produces 95% less carbon dioxide than petrol, according to a new study from Lund University (pictured), Sweden, with a 120% reduction feasible with minor modifications to biogas-producing factories ; it could thus be more than a climate-neutral fuel. This improves on earlier estimations of an 80% benefit, partly because new factors such as methane by-products and the use of biofertilisers were taken into account.
The research team analysed a biogas plant in the Skane region, one of over 20 similar facilities; they recommended that for further improvements, the plants should be heated using wood chips, and should have their biofertiliser stores covered to reduce nitrogen losses. Over 23,000 vehicles in Sweden are thought to run on biogas.