Legend has it that before 1842, all beers were Top Fermented. In the olden days, before the discovery of the existence of micro-organisms, brewers had to rely on natural sources of yeast. Top-fermenting yeast is a common yeast that became the cornerstone for the Top Fermentation definition.

As one of the oldest alcoholic beverages, beer is known as "liquid bread". It is mainly made of barley malt and water with hops added and fermented by yeast, among which brewer's yeast plays an important role. It is the power source of the whole fermentation process. How much do you know about brewer's yeast? Today, beer equipment manufacturers to take you to understand.