The Determination of Reproduction Performance of Bakers Yeast (Saccharomyces cerevisiae) and Aerobic Fermentation Loss in Molasses Medium for Using Liquid Ferment Production at Breadmaking

Authors : Nermin Bilgiçli, Selman Türker

Pages : 11-19

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Publication Date : 2001-09-15

Article Type : Research Paper

Abstract :In this study, high performance liquid ferment production from commercial compressed yeast inoculated into molasses medium was investigated for liquid ferment in breadmaking. In yeast growth, one liter ferınentor with controlled heating, aeration and mixing was used. At each application, as liquid ferment growth medium, sterilized molasses solution with 300 ppm sugar used in equivalant amount to the water needed for 100 g flour in breadmaking. As factors, 0.250, 0.375 and 0.500 g compressed yeast inoculations; 25, 30 and 35% specific reproduction rates and five reproduction time (1,2,3,4 and 5 hours) were tried. Yeast production performance and aerobic fermentation losses were used as parameters. As a result, the highest yeast reproduction performance in the stirred and aerated growth mediuin of molases solution was obtained with lower yeast inoculation levels and spesific reproduction rates. Yeast reproduction performance decreased at 0.500 g/lt inoculum, 35% spesific reproduction rate and the longer time than 4 hours. The optimal growth time were 4 hours for the yeast reproduction performance and 2 hours for the aerob fermentations losses for the liquid ferment production. In the first two hours two times dry matter at the end of four hours three times dry matter of the original yeast inoculum were obtained.
Keywords : : Ekmek mayası, Saccharomyces cerevisiae, aerobik fermentasyon, Maya üreme perforınansı