"The membrane is the real challenge, " says Stein Eirk Skilhagen, vice president of the Osmotic Power project at Statkraft.
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Since then, Statkraft has greatly scaled up the size of its osmotic generators.
Existing membranes cater to the desalination industry and haven't combined the two essential features needed for an osmotic power plant, said Skilhagen.
In June, Statkraft began building the world's first osmotic power plant, and hopes to have it up and running by the end of the year.
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