Cultivation of yeasts on hydrolysate nutrient medium obtained from the production of microcrystalline cellulose

Abstract

Studies of the biomass production during a continuous cultivation of yeasts on a nutrient medium, prepared from a hydrolysate from the production of microcrystalline cellulose, have been carried out. A new strain of yeasts has been used. Its cultivation has been achieved without addition of biostimulntors to the nutrient medium in spite of their absence in the initial hydrolysate. Practicslly EL complete assimilation of sugars has been .achieved at high dilution rates ( D = 0.25 to 0.50 h-1). The yield of biomass achieved is above 50% compared to the initial sugars and it contains 48.89% true protein. The results obtained offer the possibility of a complex utilization of the products of cellulose hydrolysis in the production of microcrystalline cellulose with a realization of a waste free technology.