Resumo

PENA-SERNA, Carolina; CASTRO-GIL, Carolina  e  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 (ANTIOQUIA), COLOMBIA. Actu Biol [online]. 2012, vol.34, n.96, pp.21-31. ISSN 0304-3584.

The production of bioethanol using Saccharomyces cerevisiae (Fungi: Ascomycota) is influenced by sugar concentration and fermentation substrate. For that reason, the kinetics of biomass production, residual sugars, and ethanol production of four of S. cerevisiae strains were evaluated in two different fermentation media (sugar-cane molasses and rejected-banana juice) at two different sugar concentrations (100 and 170 g/l). The EthanolRed® 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 sugar-cane molasses broth. Additionally, the strain GG570-CIBII showed an increase of 37.1 g/l ethanol with respect to the control strain.

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

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