Effects Of Different Fermentation Conditions On The Quality Of The Chardonnay Wine

Chardonnay(Chardonnay)is an ancient,great white grape varieties,which are originated in France and grown around the world.The maturity stage of the Chardonnay is earlier,and the Chardonnay is suitable for growing in a cool area and commonly used in white wine and champagne brewing.Typically Chardonnay wines are transparent and translucent,presented light yellow-green,refreshing fruit aroma and has a full-bodied palate.Two kinds of brewing processes was used in this paper,which were traditional white wine brewing process and cryogenic brewing process,in addition five kinds of yeasts was used in the two processes.According to the temperature and yeast optimization,the brewing process of chardonnay dry white wine was explored and compared with traditional brewing process in this paper.According to index of the five kinds of yeasts in the two fermentation processes,including color,aroma,total phenol content,total acid,volatile acid,alcohol,residual sugar content and integrated sensory evaluation,the quality difference of Chardonnay wine using the two different brewing process was studied,in order to finding the optimal process and the process parameters of the cryogenic brewing process.In this paper,the optimization of fermentation temperature and fermentation performance of different yeast was discussed with practical significance.The results indicate that: In the two different brewing process,the Chardonnay dry white wine brewed by yeast of CEC01 contained higher alcohol content,lower residual sugar and volatile acids content,which indicates that the fermentation performance of CEC01 wine yeast is better than the other four yeasts;According to the result of the GC-MS analysis,the Chardonnay wine brewed by CEC01 contained the most abundant species;Aroma species of the Chardonnay wine brewed by cryogenic brewing process were more than by traditional white wine brewing process;The physicochemical indexes of Chardonnay wine brewed by five kinds of yeasts using cryogenic brewing process is better than traditional white wine brewing process,mainly in terms of alcohol content,volatile acid and so on;The comprehensive sensory evaluation score of Chardonnay wine brewed by five kinds of yeast using cryogenic brewing process is better than traditional white wine brewing process;The fermentation cycle in cryogenic brewing process is longer than that in traditional white wine brewing process,which was selected for further optimization in the future research.