Study on the technology of producing wheat beer by secondary fermentationSecondary fermented wheat beer is a beer produced by using the upper fermentation yeast No.354 and the lower fermentation yeast No.308 as production strains, using wheat malt and special malt as raw materials

The freezing point temperature at which beer or fermentation liquid freezes can be calculated by referring to the following formula:T ice = - (alcohol content × 0.42 + wort concentration × 0.04 + 0.2)

Both the non-enzymatic decomposition of α-acetolactate and the enzymatic reduction of diacetyl are temperature-dependent. The higher the temperature, the faster the reaction. Therefore, if the main fermentation temperature is increased, or the fermentation temperature is maintained at a higher temperature before the end of the main fermentation, the diacetyl is reduced quickly, and the post-fermentation time of the beer is greatly shortened.