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Por favor, use este identificador para citar o enlazar este ítem: http://documenta.ciemat.es/handle/123456789/4867

Título : A sequential steam explosion and reactive extrusion pretreatment for lignocellulosic biomass conversion within a fermentation-based biorefinery perspective
Autor : Oliva, José Miguel
Negro, María José
Manzanares, Paloma
Ballesteros, Ignacio
Chamorro, Miguel Ángel
Sáez, Felicia
Ballesteros, Mercedes
Moreno, Antonio D.
Palabras clave : Lignocellulosic biomass
Steam explosion
Extrusion
Scheffersomyces stipitis
Saccharomyces cerevisiae
Simultaneous saccharification and fermentation
Fecha de publicación : 20-abr-2017
Editorial : Multidisciplinary Digital Publishing Institute
Citación : Oliva, J.M.; Negro, M.J.; Manzanares, P.; Ballesteros, I.; Chamorro, M.Á.; Sáez, F.; Ballesteros, M.; Moreno, A.D. A sequential steam explosion and reactive extrusion pretreatment for lignocellulosic biomass conversion within a fermentation-based biorefinery perspective. Fermentation 2017, 3(2):15. https://doi.org/10.3390/fermentation3020015
Resumen : The present work evaluates a two-step pretreatment process based on steam explosion and extrusion technologies for the optimal fractionation of lignocellulosic biomass. Two-step pretreatment of barley straw resulted in overall glucan, hemicellulose and lignin recovery yields of 84%, 91% and 87%, respectively. Precipitation of the collected lignin-rich liquid fraction yielded a solid residue with high lignin content, offering possibilities for subsequent applications. Moreover, hydrolysability tests showed almost complete saccharification of the pretreated solid residue, which when combined with the low concentration of the generated inhibitory compounds, is representative of a good pretreatment approach. Scheffersomyces stipitis was capable of fermenting all of the glucose and xylose from the non-diluted hemicellulose fraction, resulting in an ethanol concentration of 17.5 g/L with 0.34 g/g yields. Similarly, Saccharomyces cerevisiae produced about 4% (v/v) ethanol concentration with 0.40 g/g yields, during simultaneous saccharification and fermentation (SSF) of the two-step pretreated solid residue at 10% (w/w) consistency. These results increased the overall conversion yields from a one-step steam explosion pretreatment by 1.4-fold, showing the effectiveness of including an extrusion step to enhance overall biomass fractionation and carbohydrates conversion via microbial fermentation processes.
URI : http://documenta.ciemat.es/handle/123456789/4867
ISSN : 2311-5637
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