Optimization of brewing conditions for Kaoliang liquor

• Main Authors: CHEN,YING,HAO, 陳盈豪
• Other Authors: LIU,FENG,JIIN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/cu9mj2

碩士 === 國立聯合大學 === 化學工程學系碩士班 === 107 === This study investigates fermentation of sorghum liquor by using liquid fermentation from raw material. The Taguchi orthogonal array L9(34) was used in the experiments. Two sets of parameters were used to study the influence of these variations of parameters on the alcohol content and yield via signal to noise ratio. First set of parameters was the Aspergillus concentration, brewing duration, brewing temperature, and sugar concentration. Second set of parameters was the Aspergillus concentration, brewing duration, brewing temperature, the amount of water added. The optimal conditions of the alcohol content and yield were analyzed by Minitab statistical software. The pH value was measured during fermentation. Results was shown that first set of experiment (alcohol content, alcohol yield) was better than the second set of experiment. The significant influence of first set of parameters was as follows: Aspergillus concentration > sugar concentration > brewing temperature > brewing duration.The significant influence of the second set of parameters was as follows: Aspergillus concentration > sugar concentration > brewing duration > brewing temperature. The predicted optimal alcohol yield conditions of the first set was as follows: Aspergillus concentration of 0.8 wt.%, brewing duration of 15 days, brewing temperature of 20°C, sugar concentration of 15 wt.%. The predicted optimal alcohol yield conditions of the second set was as follows: Aspergillus concentration of 0.8 wt.%, brewing duration of 20 days, brewing temperature of 20°C, sugar concentration of 15 wt.%. The optimal condition of first set parameters was experimental verified. The alcohol yield was 42.02 (L/Kg%). Four sets of homemade Aspergillus with different preparation conditions were brewing under the preferred parameter values. Alcohol yield was determined by the gas chromatography.