A METHOD OF ALCOHOLIC FERMENTATION WITH THE CATALYSTS KISSIRIS AND GAMMA-ALUMINA, AFTER THEIR REGENERATION

摘要

A method of alcoholic fermentation with the catalytic action of the catalysts Kissiris and gamma -alumina, which can find an application in the industry, since these catalysts are regenerated, after the fermentation of a batch, with hot water treatment. Thus, they can be used again for a large number of batches with no productivity decrease. With these catalysts we can ferment completely diluted molasse with initial 17.3<0>Be and obtain acceptable yields of ethanol to the industry (0.45-0.49 g/g) and productivity (40-60 g/l/24hr) with alcohol content 11 % v/v. Without the use of the catalysts we have a productivity of 7.5-18 g/l/24hr, yields of 0.28-0.39 g/g and an alcohol content of 6-9 % v/v. Analogous results we obtain with gamma -alumina in fermentations of the sugars fructose, sucrose, invert sugar e.t.c. The use of gamma -alumina powder, 850 mu m, gave, with stirring, better results than the pellets.