Beatrice Sirakaya¹ and Ali Demirci²
¹Department of Biochemistry and Molecular Biology
²Associate Professor, Department of Agricultural and Biological Engineering
The Pennsylvania State University
The aim of this project was to evaluate economical industrial grade animal-by-products for ethanol production by Saccharomyces cerevisiae. Ethanol fermentation with different media compositions as the nitrogen source was compared with premium yeast extract in terms of ethanol produced (g/L), biomass produced (g/L), production rate of ethanol (g/L/h), growth rate of the organism (g/L/h) and the maximum growth rate (). The results demonstrated that five out of the seven industrial grade media were comparable with the premium yeast extract as the nitrogen source. Therefore, the industrial grade media could be attractive to the ethanol industry due to their low costs.