The Art of Great Fermentation: Mastering the Craft of Brewing Kumar Jeetendra | September 17, 2023 Fermentation definition: fermentation is an anaerobic chemical process that breaks down molecules like glucose. More specifically, fermentation is the foaming that happens during the creation of wine and beer, a procedure that has been around for at least 10,000 years. Making sure that your beer or other fermented beverages ferment successfully and consistently is an …