79752 20200716101455.0 doi 10.3390/en12132614 sideral 112602 ART-2019-112602 eng Portero Barahona, Patricia Assessment of the effect of nitrogen concentration on fermentation and selection of a highly competitive Saccharomyces cerevisiae strain for efficient ethanol production 2019 Access copy available to the general public Unrestricted The optimum nitrogen concentration for media supplementation and strain dominance are aspects of key importance to the industrial production of ethanol with a view to reducing costs and increasing yields. In this work, these two factors were investigated for four ethanologenic Saccharomyces cerevisiae strains (CLQCA-INT-001, CLQCA-INT-005, CLQCA-10-099, and UCLM 325), selected from the screening of 150 isolates, mostly from Ecuadorian yeast biodiversity. The effect of nitrogen concentration was assessed in terms of cellular growth, glucose consumption and ethanol production, and the yeast strains’ dominance was evaluated in continuous co-fermentation with cellular recycling by mitochondrial DNA analyses. Among the four selected yeast strains under study, CLQCA-INT-005 presented the highest glucose consumption at a nitrogen supplement concentration as low as 0.4 g·L−1, attaining an ethanol yield of up to 96.72% in 24 h. The same yeast strain was found to be highly competitive, showing a dominance of 80% after four cycles of fermentation in co-culture. Thus, CLQCA-INT-005 may be deemed as a very promising candidate to be used both at pilot-plant scale and at industrial scale cellulosic ethanol production. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.702 2019 ENERGY & FUELS 63 / 112 = 0.562 2019 Q3 T2 0.635 2019 Control and Optimization 2019 Q2 Electrical and Electronic Engineering 2019 Q2 Renewable Energy, Sustainability and the Environment 2019 Q2 Energy Engineering and Power Technology 2019 Q2 Fuel Technology 2019 Q2 Energy (miscellaneous) 2019 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Martín Gil, Jesús (orcid)0000-0003-2713-2786 Martín Ramos, Pablo Universidad de Zaragoza Briones Pérez, Ana Carvajal Barriga, Enrique Javier 5011 500 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Area Ingeniería Agroforestal 12, 13 (2019), 2614 [12 pp.] ENERGIES Energies 1996-1073 1590914 http://zaguan.unizar.es/record/79752/files/texto_completo.pdf Versión publicada 96247 http://zaguan.unizar.es/record/79752/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:79752 articulos driver 2020-07-16-09:09:11 ARTICLE