Fruit shades that can be felt in beer are usually
formed by yeast if the recipe does not have real fruits. During the fermentation process, a reaction occurs between the organic acids present in the wort and the resulting ethyl alcohol. Its result is the appearance of ethers. Most often, esters can manifest themselves in the form of the aroma of banana, pear, apple, honey, rose, and in some cases, solvents.
Since the formation of esters occurs as a result of the reaction between alcohol and acids, there are three factors that can influence the course of this process. Understanding and managing them, the brewer can achieve the required level of esters in beer. Continue reading