Fermentation of High Concentration Alcohol

The purpose of high concentration alcohol fermentation was to achieve maximum alcohol within certain period by improving starch content in fermented liquor of unit volume and through the action of adequate quantity of yeast. The factors influencing high concentration alcohol fermentation included: glucose concentration, alcohol content, dissolved oxygen concentration, yeast cell density, fermentation temperature and scarcity of assistant nutritive substance etc. The approaches to improve high concentration alcohol fermentation included: seperating and reforming of quality yeast strains, improvement of fermentation system, application of the technique of compound enzyme addition, and utilization of nutrition limiting factor. (Tran. by YUE Yang)