The Tropenhaus (English: Tropic House) in Frutigen, Switzerland is a commercial project using geothermal energy from the Lötschberg rail tunnel for the production of exotic fruit, sturgeon meat and caviar in a tropical greenhouse in the Swiss alps. In 2007, the project received the Prix Evenir, the Swiss petroleum industry's CHF 50,000 award for sustainable development.

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  • Das Tropenhaus Frutigen ist ein Gewächshaus und eine Zuchtanlage in der Schweizer Gemeinde Frutigen. In der ausgedehnten, öffentlich zugänglichen Anlage des Tropenhauses werden Wärme liebende Fische und Pflanzen in einem tropischen Klima gezüchtet. Die Wärme wird durch das Bergwasser des Lötschberg-Basistunnels gewonnen. Im Tropenhaus Frutigen mit seinen 88 Angestellten befinden sich die erste Störzucht des alpinen Raums und der einzige Schweizer Betrieb zur Gewinnung von Kaviar.
  • The Tropenhaus (English: Tropic House) in Frutigen, Switzerland is a commercial project using geothermal energy from the Lötschberg rail tunnel for the production of exotic fruit, sturgeon meat and caviar in a tropical greenhouse in the Swiss alps. In 2007, the project received the Prix Evenir, the Swiss petroleum industry's CHF 50,000 award for sustainable development. The idea for the greenhouse was born in 2002 when it became apparent that the water continuously flowing out of the world's longest land tunnel could not be diverted to the local river, the Kander, as its temperature of 20 °C (68 °F) would disrupt the biological rhythm of the endangered trout there. Rather than cooling the water artificially, wasting its thermal energy, tunnel engineers founded a start-up company to use the warm water to heat a greenhouse. Construction of the site, which started in May 2008 at a cost of CHF 28 million, is due to be completed at the end of 2009. A sturgeon farm, one of few in Europe, is the heart of the Tropenhaus. Some 60,000 fish are intended to be grown in 40 outdoor basins. The sturgeons thrive in permanent Siberian summer conditions and are intended to yield 20 tonnes of meat as well as two tonnes of caviar annually. The first sturgeon fillets were sold in local stores in November 2008. The rest of the greenhouses are dedicated to the production of exotic fruit, such as banana, papaya, mango and guava, of which about 10 tons are intended to be grown annually in an area of 2,000 m (21,500 sq ft). The Tropenhaus is also intended to be a tourist destination, with a visitors' centre, a visitors' trail through the installation, a restaurant, and an exhibition room (paid for by a Bernese energy company) showcasing the project's use of renewable energy and sustainability.
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  • Das Tropenhaus Frutigen ist ein Gewächshaus und eine Zuchtanlage in der Schweizer Gemeinde Frutigen. In der ausgedehnten, öffentlich zugänglichen Anlage des Tropenhauses werden Wärme liebende Fische und Pflanzen in einem tropischen Klima gezüchtet. Die Wärme wird durch das Bergwasser des Lötschberg-Basistunnels gewonnen. Im Tropenhaus Frutigen mit seinen 88 Angestellten befinden sich die erste Störzucht des alpinen Raums und der einzige Schweizer Betrieb zur Gewinnung von Kaviar.
  • The Tropenhaus (English: Tropic House) in Frutigen, Switzerland is a commercial project using geothermal energy from the Lötschberg rail tunnel for the production of exotic fruit, sturgeon meat and caviar in a tropical greenhouse in the Swiss alps. In 2007, the project received the Prix Evenir, the Swiss petroleum industry's CHF 50,000 award for sustainable development.
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  • Tropenhaus Frutigen
  • Tropenhaus Frutigen
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