Biogas buses in Växjö / Sweden
Topic of the practice
Renewable energy , sustainable transport
Good Practice Information
Buses in the city of Växjö are now fuelled by biogas, instead of diesel. The gas is produced by anaerobic digestion of the food waste from households, resturants and food industry together with sludge from the sewage treatment plants in the city. The residue is used as a natural fertiliser in agricultural production of food, and thereby constitutes a closed loop of circulation of nutrients.
The city of Växjö has built the facilities including filling stations for the buses, while the buses themselves are run by a private company that won in a bidding process of the public purchase of the service. The costs, from household equipment for source sorting to filling facitlites, are 20 M Euro. The project recived a 1,5 M Euro subsidy from the Swedish government.
Evidence of success
The current gas production from the anaerobic digester is 1 100 000 Nm3/year, the full potential capacity is 2 500 000 Nm3/year. The current production reduces the use of diesel by 1 100 000 litres/year which leads to a 3 million tonnes per year reduction of CO2-emissions. More than 77% of the households have chosen to sort their food waste and the material is 98.5% clean.
Contact details to obtain further information on the practice
Annex completed on: 06-28-2013