Artículo
Optimization of ethanol fermentation from discarded carrots using immobilized Saccharomyces cerevisiae
Clementz, Adriana Laura
; Aimaretti, Nora Rosa; Manuale, Débora Laura
; Codevilla, Agustin; Yori, Juan Carlos
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
06/2015
Editorial:
Springer Verlag
Revista:
International Journal of Energy and Environmental Engineering
ISSN:
2008-9163
e-ISSN:
2251-6832
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Discarded carrots are a valuable source of biomass amenable for valorization. Their use as raw material for ethanol production by fermentation, using yeasts immobilized in Calcium alginate, was proposed. The biocatalyst immobilization method, the existence of internal and external mass transfer limitations, the effect of the initial pH and the reuse of immobilized yeasts were particularly evaluated. Results indicate that beads made with a 2 % solution of Sodium alginate and a 30 % solution of Saccharomyces cerevisiae were strong enough to allow an efficient nutrient transfer into the matrix and to prevent cell leaking. A stirring rate of 200 rpm was needed to avoid external mass transfer limitations. These beads were used in three successive fermentations. An initial pH of 5.5 reached the best fermentation parameters. Non-enriched, non-sterile carrot must was fermented through immobilized yeasts; and values of ethanol concentration (29.9 g L−1), Yp/s (0.409 g g−1), and productivity (7.45 g L−1 h−1) were obtained. These values were similar to those registered when free cells were used.
Palabras clave:
Bioethanol
,
Calcium Alginate Bead
,
Carrot Discard
,
Immobilization
,
Reuse
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Clementz, Adriana Laura; Aimaretti, Nora Rosa; Manuale, Débora Laura; Codevilla, Agustin; Yori, Juan Carlos; Optimization of ethanol fermentation from discarded carrots using immobilized Saccharomyces cerevisiae; Springer Verlag; International Journal of Energy and Environmental Engineering; 6; 2; 6-2015; 129-135
Compartir
Altmétricas