Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization

Tons of sugar cane bagasse are produced in Brazil as waste of the sugar and ethanol industries. This lignocellulosic material is a potential source for second-generation ethanol production. Diluted acid hydrolysis is one of the most efficient pretreatments for hemicellulosic solubilization. The hydr...

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Autores principales:	Vargas Betancur,Gabriel J, Pereira Jr,Nei
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2010
Materias:	hemicellulose hydrolysis severity factor xylose
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300010
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spelling	oai:scielo:S0717-345820100003000102010-06-08Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimizationVargas Betancur,Gabriel JPereira Jr,Nei hemicellulose hydrolysis severity factor xylose Tons of sugar cane bagasse are produced in Brazil as waste of the sugar and ethanol industries. This lignocellulosic material is a potential source for second-generation ethanol production. Diluted acid hydrolysis is one of the most efficient pretreatments for hemicellulosic solubilization. The hydrolysate obtained is rich in xylose, which can be converted to ethanol by Pichia stipitis. This work used a statistical approach and the severity factor to investigate the effects of factors associated with the diluted acid hydrolysis process (acid concentration, solid:liquid ratio and time of exposure) on various response variables (xylose concentration, hydrolysis yield, inhibitor concentration and hydrolysate fermentability). The severity factor had a strong influence on the generation of inhibitors. The statistical analysis was useful for determining the effects of the individual factors and their interactions on the response variables. An acid concentration of 1.09% (vv), an S:L ratio of 1:2.8 (g:ml), and an exposure time of 27 min were established and validated as the optimum pretreatment conditions for the generation of hydrolysates with high xylose concentration and low contents of inhibitors. In such conditions, hydrolysate with 50 g/l of xylose was obtained.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.13 n.3 20102010-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300010en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	hemicellulose hydrolysis severity factor xylose
spellingShingle	hemicellulose hydrolysis severity factor xylose Vargas Betancur,Gabriel J Pereira Jr,Nei Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization
description	Tons of sugar cane bagasse are produced in Brazil as waste of the sugar and ethanol industries. This lignocellulosic material is a potential source for second-generation ethanol production. Diluted acid hydrolysis is one of the most efficient pretreatments for hemicellulosic solubilization. The hydrolysate obtained is rich in xylose, which can be converted to ethanol by Pichia stipitis. This work used a statistical approach and the severity factor to investigate the effects of factors associated with the diluted acid hydrolysis process (acid concentration, solid:liquid ratio and time of exposure) on various response variables (xylose concentration, hydrolysis yield, inhibitor concentration and hydrolysate fermentability). The severity factor had a strong influence on the generation of inhibitors. The statistical analysis was useful for determining the effects of the individual factors and their interactions on the response variables. An acid concentration of 1.09% (vv), an S:L ratio of 1:2.8 (g:ml), and an exposure time of 27 min were established and validated as the optimum pretreatment conditions for the generation of hydrolysates with high xylose concentration and low contents of inhibitors. In such conditions, hydrolysate with 50 g/l of xylose was obtained.
author	Vargas Betancur,Gabriel J Pereira Jr,Nei
author_facet	Vargas Betancur,Gabriel J Pereira Jr,Nei
author_sort	Vargas Betancur,Gabriel J
title	Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization
title_short	Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization
title_full	Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization
title_fullStr	Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization
title_full_unstemmed	Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization
title_sort	sugar cane bagasse as feedstock for second generation ethanol production: part i: diluted acid pretreatment optimization
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300010
work_keys_str_mv	AT vargasbetancurgabrielj sugarcanebagasseasfeedstockforsecondgenerationethanolproductionpartidilutedacidpretreatmentoptimization AT pereirajrnei sugarcanebagasseasfeedstockforsecondgenerationethanolproductionpartidilutedacidpretreatmentoptimization
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Sugar cane bagasse as feedstock for second generation ethanol production: Part I: Diluted acid pretreatment optimization

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