Beer Fact of the Day: Lager Yeast
In 1883 the Dane Emil Hansen published the findings of his research at the Carlsberg brewery in Copenhagen and described the isolation of a favourable pure yeast culture that he labeled “Unterhefe Nr. I” (bottom-fermenting yeast no. 1 Saccharomyces pastorianus formerly known as Saccharomyces carlsbergensis ), a culture that he identified as identical to the sample originally donated to Carlsberg in 1845 by the Spaten brewery of Munich. This yeast soon went into industrial production in Copenhagen in 1884 as Carlberg yeast no. 1.