CARACTERIZAÇÃO DE LEVEDURAS SELVAGENS PARA A PRODUÇÃO DE CERVEJA
CARACTERIZAÇÃO DE LEVEDURAS SELVAGENS PARA A PRODUÇÃO DE CERVEJA
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DOI: 10.22533/at.ed.1222323104
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Palavras-chave: Leveduras selvagens; seleção; fermentação alcoólica; cerveja especial.
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Keywords: Wild yeast; screening; alcoholic fermentation; craft beer.
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Abstract: Beer, one of the oldest beverages in the world, has played roles of social, political, and economic significance throughout history. Initially, it was obtained from cereals through spontaneous fermentation, as the existence of microorganisms was not yet known. Currently, spontaneous fermentation is still employed for beer production, such as the famous beers produced in the Brussels region, the Lambic beers. However, for large-scale production, the fermentation process is carried out by selected yeast strains under controlled conditions. To be used as brewing yeast, the strain must exhibit appropriate technological characteristics, as well as produce metabolites that contribute to the beer's aroma and flavor. The use of new yeast strains can lead to obtaining beers with unique characteristics; thus, the screening of wild yeasts is an important alternative, given the large number of still unknown microorganisms. In this context, the aim of this study was to evaluate physiological and/or technological characteristics of wild yeasts for potential use in beer production. Among the evaluated characteristics, fermentative metabolism, tolerance to different ethanol concentrations, and cell flocculation capacity stand out. The tests conducted demonstrated the feasibility of using wild yeast strains, as they exhibited technological potential for the evaluated characteristics.
- Osmar Roberto Dalla Santa
- João Manoel Folador Rodriguez
- Cristina Maria Zanette