Large Phosphorus retention dam and Calcium filter bed installed in Gäddeholm, Västerås

In september 2020 the new Phosphorus retention dam at Gäddeholm, Västerås, was finalised. The dam is nearly two hectares in size. The Calcium filter bed at it’s outlet is one of the larger beds installed so far, with 400 m3 Calcium material. This measure will reduce the amount of Phosphorus and Nitrogen transported by the stream to lake Mälaren.

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