Fermentation (Fermentation).Fermentation is the process of changing the sugar in the juice fermented into alcohol (ethyl alcohol), a. thathin and carbon dioxide. The fermentation process is divided into two, the first is that the range of yeast cells to break made the most. During this period it is necessary to provide the air force with the yeast. The second range is the range of the sugar into alcohol. During this period the weather is not required, so the yeast in the fermentation process, so it is necessary to have a special type of fermentation tank cap off the air, but they can not leave the carbon dioxide resulting from the fermentation, which will call this type of stopper air locked.
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