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- Title
Detrimental effect of increasing sugar concentrations on ethanol production from maize or decorticated sorghum mashes fermented with Saccharomyces cerevisiae or Zymomonas mobilis.
- Authors
Pérez-Carrillo, Esther; Luisa Cortés-Callejas, M.; Sabillón-Galeas, Luis E.; Montalvo-Villarreal, Jorge L.; Canizo, Jesica R.; Georgina Moreno-Zepeda, M.; Serna-Saldivar, Sergio O.
- Abstract
The efficiency of ethanol fermentation, as affected by grain source (maize and decorticated red sorghum), total sugar concentration (13 or 20° Plato) and type of microorganism ( Saccharomyces cerevisiae or Zymomonas mobilis) was studied. Maize mashes yielded 0.32 l ethanol kg ground grain whereas mashes prepared with decorticated red sorghum produced 0.28 l ethanol kg. Both microorganisms yielded similar amounts of ethanol. However, high-gravity mashes (20° Plato) yielded lower amounts of ethanol compared to counterparts adjusted to 13° Plato (0.28 vs. 0.22 l ethanol kg ground grains). In decorticated sorghum mashes adjusted to 20° P, Z. mobilis produced 40 ml kg more ethanol compared to S. cerevisiae. In addition , Z. mobilis had a lower dependency on nitrogenous compounds.
- Subjects
BIOTECHNOLOGY research; ETHANOL; CORN; SORGHUM varieties; ZYMOMONAS mobilis; SACCHAROMYCES cerevisiae; BIOCHEMICAL engineering; FERMENTATION
- Publication
Biotechnology Letters, 2011, Vol 33, Issue 2, p301
- ISSN
0141-5492
- Publication type
Article
- DOI
10.1007/s10529-010-0448-9