Effects of Mixed Yeast Fermentation of Pichia kudriavzevii and Saccharomyces cerevisiae on Whiskey Volatile Aroma Components
In this paper,the effects of Pichia kudriavzevii and Saccharomyces cerevisiae fermentation on whiskey volatile aroma components were investigated by gas chromatography-mass spectrometry(GC-MS)and odor activity value(OAV).The results showed that the physicochemical indexes of mixed yeast fermentation liquid were good(pH value was 4.20,alcohol content was 4.79%vol,total acid content was 2.39 g/L and liquor yield of unit malt was 24.68 mL/100 g);the species and content of volatile aroma components were the most(16 kinds,32.85 mg/50 mL),and the types of components with OAV>1 was the highest(4 kinds),and the OAV value of ethyl caproate was the highest(119.28);the sensory evaluation score was the highest(92.9).In conclusion,the mixed yeast fermentation of P.kudriavzevii and S.cerevisiae can increase the volatile aroma components in whiskey.