Two main types of beer fermentation technology:Bottom fermentation and top fermentation The task of beer yeast in the fermentation stage is to convert part of the sugar in the wort into alcohol. The fermentation process is interrupted (not 100% sugar conversion) at the set fermentation level. The so-called young or green beer is pumped into another container, where the continuous fermentation process has a lower intensity, but at a lower temperature and a higher pressure, while the beer is carbonated by carbon dioxide, this part of the fermentation process is It is called beer maturation, also called aging.