固定化酵母细胞发酵生产酒精的研究

研究以活性炭为载体的吸附法制备固定化酵母增殖细胞．从糖蜜发酵生成酒精的实验结果表明：对于高浓度底物抑制、产物抑制和温度变化的耐受程度，固定化细胞系统明显优于游离细胞，且其表观动力学常数明显受到扩散影响．在固定化细胞系统的连续发酵过程中，当稀释度为０．８９ｈ－１时，酒精的最大生产能力为１９．５ｇ·ｈ－１·Ｌ－１．

A Study of Ethanol Fermentation by Immobilized Yeast Cell

For producing ethanol from molasses fermentation,the author studies the preparation of immobilized yeast cell by active carbon adsorption. The immoblized yeast cell system is shown experimentally to be far better than free cell system in high concentration substrate inhibition, production inhibition, and temperature change endurance. The immobilized cell system shows an apparent kinetic constant significantly influenced by diffusion limitaion. It leads to a highest ethanol productivity of 19. 5 g. h-1. L-1 at a dilution rate of 0. 89 h-1 during its continous fermentation test.