على عصارة الذرة البيضاء السكرية (Saccharomyces cerevisiae)‎ أمثلة إنتاج خميرة الخباز

Abstract EN

The research aimed to study the possibility of use the juice of sugar sorghum, as alternative substrate to produce Baker’s yeast (S.

cerevisiae), and optimizing the production’ conditions (pH, sugar concentration, incubation time and the concentration of di ammonium phosphate)by batch method.

Beet molass was used as positive control.

Results revealed, significance effect of allstudied parameters (pH, sugar concentration, incubation time and the concentration of di ammonium phosphate) and the coefficient between sugar concentration and each of pH, incubation time and the concentration of di ammonium phosphate on biomass yield.

Results of optimization showed that the best pH, sugar concentration, incubation time and the concentration of di ammonium phosphate to obtain the highest biomass yield were 5, 53g/l,28 h and without addition of di ammonium phosphate for Sugar Sorghum juice and 5, 50 g/l, 28 and 0.5 % for Beet Molasses, respectively.

Result also showed that sugar sorghum juice gave higher biomass yield (6.7 g/l)than beet molass (3.35 g/l)when studied parameters were adjusted at the optimum levels.

This research emphasized the importance of sugar sorghum juice as an alternative substrate instead of beet molass to produce baker’s yeast which have economical, artificial and feed values