Cleaner air in Stockholm with sewage sludge
Two sewage treatment works in Stockholm are producing biogas from sewage sludge. After having purified the gas, it can be used for both heating and vehicle fuel and in addition creates no net emissions of carbon dioxide. Consequently, the treatment works have reduced their amount of emissions and become energy suppliers. Therefore, sewage sludge is no longer an environmental problem, but an important energy resource.
Environmental investments in Vällingby Centrum
Svenska Bostäder have invested over three million Swedish kronor in an installation for geothermal energy and a recycling central. Thanks to the investment, Vällingby Centrum produces nowadays its own energy, which provides the shopping centre with 60 % of its need for heating and 90 % of its need for cooling.
Käppala – an efficient water treatment plant
Käppalaverket is one of the world’s most efficient water treatment installations, with the entire northern Stockholm as a catchment area. Apart from the fact that the installation treats water for over 500 000 people, it also produces biogas, running 100 busses.
Sjöstadsverket tests new treatment methods
Hammarby Sjöstadsverket in Stockholm, Sweden, was built as part of the Hammarby Sjöstad initiative, with the aim of halving environmental impact by demonstrating new technology and innovative solutions. The facility is now continuing to serve as a development centre for new water treatment technology.