Screening and Application of Saccharomycopsis fibuligera Strains with High-Yield of Saccharifying Enzyme
In order to reduce the use amount of Qingxiang Daqu,the shallow plate solid-state fermentation method was adopted,and a strain with high-yield of saccharifying enzyme was screened out from 9 Saccharomycosis fauligera strains(Y1,Y2,Y3,Y4,Y5,Y6,Y7,Y8,Y9).The screened strain was mixed with other functional microorganisms to form a pseudo Qingxiang Daqu,and the traditional Qingxiang Daqu was used as the control in the production test of Qingxiang Baijiu.The liquor yield,total acids,total esters,flavor substances and sensory quality of the liquor samples were ana-lyzed.The results showed that the liquor yield of the pseudo Daqu and the traditional Daqu were similar,both around 54％;the total acids of pseudo Daqu was 77.8％higher than that of the traditional Daqu;the ethyl lactate content of the pseudo Daqu was 201.6％higher than that of the traditional Daqu;the higher alcohols content of the pseudo Daqu was lower than that of the traditional Daqu,with a reduction of 56.78％for n-propanol and 18.6％for isoamyl alcohol;the sensory quality of the pseudo Daqu was better than that of the traditional Daqu,with more obvious flower,fruit and sweet aroma,and lower bitterness,astringency and acidity,and the liquor body was softer and more harmonious.The pseudo Qingxiang Daqu can in-crease the content of flavor substances,reduce the content of higher alcohols,enhance the flower and sweet aroma,and improve the quality of the crude liquor,which is of promotion and application value.
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