Yeast is divided into upper (ale) and lower (camp). Yeast for ales works at 16-26 ° C, and camp yeast — at 8-15 ° C. During fermentation, ale yeast forms a larger number of by - products - esters and phenols. They give beer fruity or spicy flavors and aromas. Beer fermented with camp yeast at low temperatures, on the contrary, has a cleaner taste and aroma, in which the taste of malt and hops prevails. At home, it is easier to maintain the temperature for fermentation of ales. Fermentation of camp yeast usually requires special refrigeration equipment. Such styles as all kinds of ales, wheat beer, porters, statutes, etc. are fermented with horse yeast. Lagers, pilsners, bocks, etc. are fermented with grassroots yeast.
