DELIGNIFIED CELLULOSIC MATERIALS TO IMPROVE INDUSTRIAL PROCESSES OF ALCOHOLIC FERMENTATION

摘要

A method for the removal of lignine from cellulosic materials is proposed. Such materials can be used as catalysts in fermentation for alcohol production, by using glucose or molasses solutions as raw materials. With the methods used and the results obtained, it was shown that lignine free materials increase the rate of alcoholic fermentation as well as the final alcohol content, compared to the fermentation without such materials. The usage of lignine free materials is also proposed for the immobilisation of fermentation yeast cells. Biocatalysts produced in such a way were shown to be suitable for the production of wine and beer at low temperatures (0-5 °C) yielding satisfactory fermentation times, but also for fermentation at normal temperatures with low fermentation times and for a large number of fermentation batches. Finally, the biocatalyst that resulted from cells immobilisation in lignine-free cellulosic materials, proved to be suitable for wine and beer production in a continuous operation reactor. This was shown by the fact, that the reactors productivity was not reduced following its operation for 65 days.