| Full text | |
| Author(s): |
Laura Muruaga, Maria
[1, 2]
;
Carvalho, Katia G.
[1]
;
Manuel Dominguez, Jose
[3]
;
de Souza Oliveira, Ricardo Pinheiro
[4]
;
Perotti, Nora
[1, 2]
Total Authors: 5
|
| Affiliation: | [1] PROIMI CONICET, San Miguel De Tucuman, Tucuman - Argentina
[2] Natl Univ Tucuman, San Miguel De Tucuman - Argentina
[3] Univ Vigo, Fac Sci, Dept Chem Engn, Orense 32004 - Spain
[4] Univ Sao Paulo, Fac Pharmaceut Sci, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | RENEWABLE ENERGY; v. 85, p. 649-656, JAN 2016. |
| Web of Science Citations: | 4 |
| 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 Tucuman (Argentina) and grapes obtained from farms located in Cafayate (Salta, Argentina). Among the twenty-nine samples studied A2, A10 and All 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 All 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. (C) 2015 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 13/12713-1 - Biotechnological production and purification of plantaricin by Lactobacillus plantarum St16Pa using natural culture medium |
| Grantee: | Ricardo Pinheiro de Souza Oliveira |
| Support Opportunities: | Regular Research Grants |