Abstract
In order to select the non-Saccharomyces yeasts for orange wine fermentation, the enological traits and volatile compounds formation of ten non-Saccharomyces yeast strains were evaluated through physicochemical methods and solid-phase microextraction coupled to GC-MS, respectively. The results indicated that non-Saccharomyces yeast fermentation had lower maximum populations (7.8-8.0Logcfu/mL), longer fermentation period (7-10days), lower ethanol (4.13-7.79%), lower total acids (7.48-8.51g/L) and higher volatile acids concentrations (0.08-0.23g/L) when compared with those of Saccharomyces cerevisiae fermentation. Hanseniaspora uvarum, Hanseniaspora opuntiae, Hanseniaspora occidentalis, Pichia kudriavzevii and Torulaspora delbrueckii were selected as candidates for orange wine fermentation with higher volatile compounds concentration, odor active values and sensory evaluation scores. This study will provide a valuable selection method of non-Saccharomyces yeasts for orange wine fermentation, and an approach to improve the flavor of orange wine or other fruit wine.
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