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Isolation and characterization of Saccharomyces species for bioethanol production from sugarcane molasses: Studies of scale up in bioreactor

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  • Muruaga, María Laura
  • Carvalho, Kátia G.
  • Domínguez, José Manuel
  • de Souza Oliveira, Ricardo Pinheiro
  • Perotti, Nora

Abstract

Decreases in oil reserves and gas fields around all over the world justify the deepening of studies to render viable the larger-scale use of new energy sources. Therefore, the use of microorganisms to convert sugars into ethanol is a feasible process to be performed in a short period of time and at low costs. In this context, this study aimed to select ethanol-producing yeasts, after isolating samples in molasses obtained from companies in the Province of Tucumán (Argentina) and grapes obtained from farms located in Cafayate (Salta, Argentina). Among the twenty-nine samples studied A2, A10 and A11 isolates showed higher ethanol productions of 12.87; 13.64 and 13.46% respectively. A2 showed a homogeneous growth meanwhile the growth of strains A10 and A11 was flocculent. Molecular taxonomic characterization of these isolates showed a percentage of similarity of 100% with the strain Saccharomyces cerevisiae. The behavior of the non-flocculent A2 strain at laboratory scale was faster using a sugarcane molasses based medium, reaching 11.36% ethanol without adding nutrients and other growth factors, probably because its disperse form facilitates the transfer of nutrients and products. These values were improved to 12.02% when the process was scaled up to a 10L bioreactor. All these studies allowed concluding that S. cerevisiae A2 strain is a promising microorganism for the production of bioethanol with potential environmental, energy and economic benefits to be projected into industrial scale.

Suggested Citation

  • Muruaga, María Laura & Carvalho, Kátia G. & Domínguez, José Manuel & de Souza Oliveira, Ricardo Pinheiro & Perotti, Nora, 2016. "Isolation and characterization of Saccharomyces species for bioethanol production from sugarcane molasses: Studies of scale up in bioreactor," Renewable Energy, Elsevier, vol. 85(C), pages 649-656.
    • Handle: RePEc:eee:renene:v:85:y:2016:i:c:p:649-656
    DOI: 10.1016/j.renene.2015.07.008
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    References listed on IDEAS

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    1. Colin, Emerson C., 2009. "Mathematical programming accelerates implementation of agro-industrial sugarcane complex," European Journal of Operational Research, Elsevier, vol. 199(1), pages 232-235, November.
    2. Milan Pupin, Gustavo & Strachman, Eduardo, 2011. "El sector brasileño del azúcar y el alcohol: evolución, cadena productiva e innovaciones," Revista CEPAL, Naciones Unidas Comisión Económica para América Latina y el Caribe (CEPAL), April.
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    Cited by:

    1. Dhiman, Saurabh Sudha & David, Aditi & Braband, Vanessa W. & Hussein, Abdulmenan & Salem, David R. & Sani, Rajesh K., 2017. "Improved bioethanol production from corn stover: Role of enzymes, inducers and simultaneous product recovery," Applied Energy, Elsevier, vol. 208(C), pages 1420-1429.
    2. Shanmugam, Sabarathinam & Ngo, Huu-Hao & Wu, Yi-Rui, 2020. "Advanced CRISPR/Cas-based genome editing tools for microbial biofuels production: A review," Renewable Energy, Elsevier, vol. 149(C), pages 1107-1119.

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