Abstract

PENA-SERNA, Carolina; CASTRO-GIL, Carolina  and  PELAEZ-JARAMILLO, Carlos A.. EVALUATION OF ETHANOL PRODUCTION FROM TWO RECOMBINANT AND A COMMERCIAL STRAINS OF SACCHAROMYCES CEREVISIAE (FUNGI: ASCOMYCOTA) IN SUGAR-CANE MOLASSES AND REJECTED-BANANA JUICE FROM URABÁ, COLOMBIA. Actu Biol [online]. 2011, vol.33, n.95, pp.183-192. ISSN 0304-3584.

The production of bioethanol using Saccharomyces cerevisiae (Fungi: Ascomycota) is influenced by sugar concentrations and the fermentation substrate. For that reason, in this study the kinetics of biomass production, residual sugar and ethanol production of four S. cerevisiae strains were evaluated in two fermentation media (sugar-cane molasses and rejected-banana juice) at two sugar concentrations (100 and 170 g/l). The Ethanol Red^® and GG570- CIBII strains exhibited the greatest ethanol production, with peak values of 119.74 (35 h) and 62 g/l (15 h), Y_ps 0.75 and 0.43 g/g, and Q_p 3.42 and 2.61 g/l/h, respectively, at 170 g/l of sugar in the sugar-cane molasses broth. In additional, the GG570-CIBII strain showed an increase of 37.1 g/l ethanol with respect to the control strain.

Keywords : adhII gene; bioethanol; pdc gene; recombinant Saccharomyces cerevisiae; rejected-banana juice; sugar-cane molasses.

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