All Focus Areas + All Technical Areas (178 hits)

Artificial wetlands in Trosa

Since 2003 the waste water from the town of Trosa (about 4500 citizens) has been treated in artificial wetlands, after the basic treatment in the sewage plant. Thanks to the wetlands the Trosa river and the town bay have been spared from eutrophicating substances (plant nutrients) as well as contagious substances (pathogenes). Besides the value of purifying the water, the wetlands are a popular recreation area. The wetlands are used for education and many study visits are made here. Vagnhärad, the neighbouring town with about 4500 citizens, has a similar area of artificial wetlands since 2001.

Bålsta extracts waste heat

The district heating plant in Bålsta supplies Håbo municipality with environmentally-friendly heat and hot water. The plant consists of three boilers: a wood chip boiler, a pellet boiler and an oil-fired boiler, which together represent 80% of the plants total energy production. The remaining 20% are taken from a adjucent gypsum factory, whose waste heat is led to the boiler through pipes.

Boat-washer in Trosa Marina

In Trosa Marina there is a boat-washer, which scrubs off the fouling on boat hulls. Thanks to the boat-washer, the boat-owners do not have to use environmentally-hazardous anti fouling paints anymore.

Congestion charges in Stockholm

The introduction of congestion charges in Stockholm was one of the reasons why Stockholm was awarded “European Green Capital 2010”. The introduction has led to reduced traffic with somewhere between 20 and 25% and that air quality has been improved, according to the Road Administration.

Extensive renovation made a 70´ies building energy

The City block Pennfäktaren was once a energy-guzzling building from the 1970’ies, which has been rebuilt and become one of Stockholm’s most modern office buildings, with many examples of cleantech installations.

Laduvikens Waterparc

At Laduviken, 5 million Swedish kronor is invested in a water park, which will reduce the amount of pollutants entering the lake through storm water. The aim is, among other things, to reduce phosphorus by 25%.

Landfill gas is being extracted in Bro

The district heat plant in Bro produces environmentally friendly power. About ¾ of the installation’s total heat production comes from landfill gas from Ragnsell landfill in Högbytorp. The remaining energy is produced by burning vegetable oil.

Myrsöns wetlands – cleaning verdure

An artificial wetland was built in the spring of 2006 next to the lake Myrsjön in Nacka. The aim is to use nature’s own mechanisms to clean the polluted storm water from an industrial area, before it runs into the lake Myrsjön.

Organic model farm at Nynäs gård

At Nynäs gård, there is a biogas installation, which is designed for the farm’s phosphorus needs. The farm does no longer need to purchase any chemical fertilizers, nor does it need to buy fuel for its vehicles.

Production of Liquid Biogas at Loudden

An installation for production of Liquid Biogas (LBG) is under construction at Loudden in Stockholm. This will be the first large-scale biogas installation in Stockholm, which produces biogas using organic waste.


Säbyverket produces heat by firing bio fuel and wood powder. Wood powder is a by-product from forestry industry and the incineration of this product entails no additional input of carbon dioxide to the atmosphere.

The eco-smart Kungsbrohuset

In Kungsbrohuset, there are several innovative cleantech solutions. Among other things, Kungsbrohuset recovers the excess heat, generated by the commuters at the Stockholm Central Station. Water from Klara Lake is used for cooling the building.

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