top fermentation

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Noun

top fermentation - a violent kind of alcoholic fermentation at a temperature high enough to carry the yeast cells to the top of the fermenting liquid; used in the production of ale; "top fermentation uses a yeast that ferments at higher temperatures than that used for bottom fermentation"

fermenting, zymolysis, zymosis, fermentation, ferment - a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol

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Lager beer is prepared from bottom-fermenting yeast and ale, while porter and stout are prepared using top fermentation.

Asia Pacific Beer Market - Industry Analysis, Size, Share, Growth, Trends and Forecast, 2014 - 2020

Bottom fermentation takes place at lower temperatures than top fermentation, of between 40 degrees F and 55 degrees F, and the yeast settles to the bottom of the fermenting vat, out of harm's way.

Beer essentials: outlining the basics of the brewing process, a thumbnail guide to beer styles and a little beer history

Proud of its heritage, the master brewers use natural ingredients and an age-old top fermentation method to give its brews a unique cloudy finish.