In this process for producing ethanol by enzymatic treatment of a must of a starchy plant material with yeasts of the genus Saccharomyces, all the old yeasts are replaced with fresh yeasts in order to keep the fermentation time between 20 and 24 hours.

En este proceso para producir el etanol por el tratamiento enzimático de a deba de un material de planta almidonado con las levaduras del género saccharomyces, todas las viejas levaduras se substituyen por levaduras frescas para guardar el tiempo de la fermentación entre 20 y 24 horas.

 
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