Talk:Steam beer

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Top fermenting vs bottom fermenting[edit]

Both ale and lager yeasts settle on the bottom after fermenting. Top fermenting vs bottom fermenting are confusing terms that do not add to the article. In any case it's factually incorrect to claim that ale yeasts "settle on top"

83.250.98.32 (talk) 09:31, 12 March 2016 (UTC)

Do you have a source for that? There are plenty (and one is long-included here) to say the opposite. I'm not a lager brewer, but the yeasts I am familiar with are top fermenting and produce a floating crust that is (apocryphally), "thick enough for a rat to run across the top". Andy Dingley (talk) 10:55, 12 March 2016 (UTC)
Sure: Papazian, The New Complete Joy of Homebrewing, page 81. Kräuzen is not the same as settling, all yeasts eventually flocculate and settle on the bottom.

83.250.98.32 (talk) 14:53, 12 March 2016 (UTC)

"Top-fermenting" and "bottom-fermenting" are historical terms that date back to the 16th and 17th centuries, when a new strain of yeast in Bavaria, and a new way of aging beer in cold cellars produced a style known as "tollbier" or "tolles bier". The behaviour of the new yeast was called "bottom-fermenting" (as opposed to the "top-fermenting" yeast used since prehistoric times) because of lower krausening during fermentation (due to the colder fermentation temperatures). In 1841, Anton Dreher the Younger, using bottom-fermenting yeast provided by his friend Gabriel Sedelmayr II of Spaten Brewery in Munich, coined the term "lagerbier" ("stored beer") to describe his new "Schwechater Lagerbier". While the actions of both strains of yeast are similar, "bottom-fermenting" has come to mean lager yeast (Saccahromyces pastorianus), while top fermenting refers to ale yeast (Saccharomyces cerevisiae). Steam beer is a "hybrid" -- a beer produced with lager yeast (bottom-fermenting) but fermented warm like ale. Likewise but in reverse, altbier and kolsch use ale yeast, but fermented cold like lagers. (From my course BREW1104 History of Beer and Brewing, offered at Niagara College, Canada as part of the Brewmaster and Brewery Operations Management program.) Guinness323 (talk) 18:26, 12 March 2016 (UTC)