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BIOGAS: THE SWEDISH CASE

Published on 30 August 2017

Sweden is one of the countries where the use of biogas for transport has shown widespread and advanced use for years.

The first three Swedish cities are true witnesses: in Stockholm, biogas produced by wastewater allows the use of 36% of buses. The discharge water of one million citizens arrives at Henriksdal's depurator. Here, they receive the traditional treatment, with the various stages of screening, sedimentation, biological and chemical treatment, finally concluding with the discharge of clean water in nature, which is also the case for wastewater in Italy. The difference is that the mud resulting from filtration and decantation is not discarded, but fermented, until releasing bio methane, later on used to fuel urban biogas buses.

Gothenburg, with over 500,000 people, is the second largest city in Sweden. Here, since 2007, biogas is used to fuel up to 6,000 vehicles, as well as producing 72GWh of electricity every year.

Finally, Malmö, the third city in the country with almost 300,000 inhabitants: 50% of buses already travel thanks to biogas produced by food waste.