#Danish #botanist who #revolutionised #beer-making through development of new ways to #culture #y…

#Danish #botanist who #revolutionised #beer-making through development of new ways to #culture #yeast.

He financed his education by writing novels. Though he never reached an M.Sc., in 1876, he received a gold medal for an essay on #fungi.

In 1879, he became superintendent of the #Carlsberg breweries. In 1883, he successfully developed a #cultivated yeast that revolutionized beer-making around the world, because Hansen by refusing to patent his method made it freely available to other #brewers.

He also proved there are different #species of yeast. Hansen separated two species: #Saccaromyces cerevisae, an over-yeast (floating on the surface of the #fermenting beer) and S. carlsbergensis*, an under-yeast (laying on the bottom of the liquid).

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