Journal
PROCESSES
Volume 9, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/pr9050839
Keywords
brewing; Saccharomyces; non-Saccharomyces; non-conventional yeasts
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In the beer industry today, the quality of beer is closely tied to the fermentation activity of yeasts, with researchers and brewers now focusing on selecting new yeast strains with specific technological and metabolic characteristics to meet the growing demand for innovative and specialty beers. Saccharomyces and non-Saccharomyces yeasts are being used in brewing to produce beers with unique properties, highlighting a new biotechnological approach in the field of beer production.
Nowadays, in the beer sector, there is a wide range of products, which differ for the technologies adopted, raw materials used, and microorganisms involved in the fermentation processes. The quality of beer is directly related to the fermentation activity of yeasts that, in addition to the production of alcohol, synthesize various compounds that contribute to the definition of the compositional and organoleptic characteristics. The microbrewing phenomenon (craft revolution) and the growing demand for innovative and specialty beers has stimulated researchers and brewers to select new yeast strains possessing particular technological and metabolic characteristics. Up until a few years ago, the selection of starter yeasts used in brewing was exclusively carried out on strains belonging to the genus Saccharomyces. However, some non-Saccharomyces yeasts have a specific enzymatic activity that can help to typify the taste and beer aroma. These yeasts, used as a single or mixed starter with Saccharomyces strains, represent a new biotechnological resource to produce beers with particular properties. This review describes the role of Saccharomyces and non-Saccharomyces yeasts in brewing, and some future biotechnological perspectives.
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