Production of bio-ethanol from soybean molasses by Saccharomyces cerevisiae at laboratory, pilot and industrial scales
2008
Siqueira, Paula F. | Karp, Susan G. | Carvalho, Júlio C. | Sturm, Wilerson | Rodríguez-León, José A. | Tholozan, Jean-Luc | Singhania, Reeta Rani | Pandey, Ashok | Soccol, Carlos R.
The aim of this work was to develop an economical bioprocess to produce the bio-ethanol from soybean molasses at laboratory, pilot and industrial scales. A strain of Saccharomyces cerevisiae (LPB-SC) was selected and fermentation conditions were defined at the laboratory scale, which included the medium with soluble solids concentration of 30% (w/v), without pH adjustment or supplementation with the mineral sources. The kinetic parameters - ethanol productivity of 8.08g/Lh, Y P/S 45.4%, Y X/S 0.815%, m 0.27h⁻¹ and μ X 0.0189h⁻¹ - were determined in a bench scale bioreactor. Ethanol production yields after the scale-up were satisfactory, with small decreases from 169.8L at the laboratory scale to 163.6 and 162.7L of absolute ethanol per ton of dry molasses, obtained at pilot and industrial scales, respectively.
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