Sweden - City running on biofuel
Kristianstad, the capital of the Skane province, with 81,000 inhabitants, has been effectively using biogas to produce electricity and heat, and to drive cars and buses. The city authorities, Krinowa Science Park, Kristinastad University and farmers, residents work together on this circular project. The municipal company Kristianstad Biogas manufactures biofuels in three plants. The following graphic shows the biogas cycle.
The biogas production process is as follows
- Harvested crops become food, feed for animals or natural resources. The resulting manure, sewage, food waste and waste on landfills are used to produce biogas.
- The purified gas is then used for several purposes:
- It goes to petrol stations, where you can refuel the car with an original biofuel.
- Houses and offices generate electricity and heat from biogas.
- Gas from landfills is used for combustion in a combined heat and power plant, which reduces oil consumption.
- The digestate is returned as a bio-fertilizer and replaces fertilizers.
One of the goals of this long-term project is to increase the use of biogas in urban and private transport. The installation for the production of gas processes about 85,000 tons of organic material annually. The city of surplus biogas is exported to several neighboring municipalities.