Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production

This study compares the H2 production from glucose, xylose, and acidic hydrolysates of Agave tequilana bagasse as substrates. The fermentation was performed in a granular sludge reactor operated in two phases: (1) model substrates (glucose and xylose) and (2) acidic hydrolysates at 35 °C, pH 4.5 and...

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Autores principales:	Karla María Muñoz-Páez, Germán Buitrón
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	acidic hydrolysates glucose hydrogen xylose Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/a05d99adc2654edf839c424014fe3081
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spelling	oai:doaj.org-article:a05d99adc2654edf839c424014fe30812021-11-06T11:16:35ZRole of xylose from acidic hydrolysates of agave bagasse during biohydrogen production0273-12231996-973210.2166/wst.2021.242https://doaj.org/article/a05d99adc2654edf839c424014fe30812021-08-01T00:00:00Zhttp://wst.iwaponline.com/content/84/3/656https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732This study compares the H2 production from glucose, xylose, and acidic hydrolysates of Agave tequilana bagasse as substrates. The fermentation was performed in a granular sludge reactor operated in two phases: (1) model substrates (glucose and xylose) and (2) acidic hydrolysates at 35 °C, pH 4.5 and a hydraulic retention time of 5.5 h with glucose (10 g L−1) and xylose (12 g L−1). A sequencing batch reactor was used to acclimate the biomass between the glucose and xylose continuous fermentation (with a mixture of xylose-glucose) and acidic hydrolysates. During the discontinuous acclimating step, the xylose/glucose ratio increment negatively affected the H2 productivity. Although the continuous H2 production with xylose was negligible, the co-fermentation with glucose (88–12%) allowed H2 productivity of 2,889 ± 502 mL H2 L−1d−1. An acidic hydrolysate concentration of 3.3 gcarbohydrate L−1 showed a three-fold higher H2 productivity than with a concentration of 10 g L−1. The results indicated that xylose, as the only substrate, was challenging to metabolize by the inoculum, and its mixture with glucose improved the H2 productivity. Therefore, the low H2 productivity with hydrolysates could be related to the presence of xylose. HIGHLIGHTS The H2 productivities with glucose, xylose and acidic hydrolysates were contrasted.; H2 production was not observed with xylose as substrate in continuous operation.; H2 from acidic hydrolysates is affected by the xylose/glucose ratio and inhibitors.;Karla María Muñoz-PáezGermán BuitrónIWA Publishingarticleacidic hydrolysatesglucosehydrogenxyloseEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 3, Pp 656-666 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acidic hydrolysates glucose hydrogen xylose Environmental technology. Sanitary engineering TD1-1066
spellingShingle	acidic hydrolysates glucose hydrogen xylose Environmental technology. Sanitary engineering TD1-1066 Karla María Muñoz-Páez Germán Buitrón Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
description	This study compares the H2 production from glucose, xylose, and acidic hydrolysates of Agave tequilana bagasse as substrates. The fermentation was performed in a granular sludge reactor operated in two phases: (1) model substrates (glucose and xylose) and (2) acidic hydrolysates at 35 °C, pH 4.5 and a hydraulic retention time of 5.5 h with glucose (10 g L−1) and xylose (12 g L−1). A sequencing batch reactor was used to acclimate the biomass between the glucose and xylose continuous fermentation (with a mixture of xylose-glucose) and acidic hydrolysates. During the discontinuous acclimating step, the xylose/glucose ratio increment negatively affected the H2 productivity. Although the continuous H2 production with xylose was negligible, the co-fermentation with glucose (88–12%) allowed H2 productivity of 2,889 ± 502 mL H2 L−1d−1. An acidic hydrolysate concentration of 3.3 gcarbohydrate L−1 showed a three-fold higher H2 productivity than with a concentration of 10 g L−1. The results indicated that xylose, as the only substrate, was challenging to metabolize by the inoculum, and its mixture with glucose improved the H2 productivity. Therefore, the low H2 productivity with hydrolysates could be related to the presence of xylose. HIGHLIGHTS The H2 productivities with glucose, xylose and acidic hydrolysates were contrasted.; H2 production was not observed with xylose as substrate in continuous operation.; H2 from acidic hydrolysates is affected by the xylose/glucose ratio and inhibitors.;
format	article
author	Karla María Muñoz-Páez Germán Buitrón
author_facet	Karla María Muñoz-Páez Germán Buitrón
author_sort	Karla María Muñoz-Páez
title	Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
title_short	Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
title_full	Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
title_fullStr	Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
title_full_unstemmed	Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
title_sort	role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/a05d99adc2654edf839c424014fe3081
work_keys_str_mv	AT karlamariamunozpaez roleofxylosefromacidichydrolysatesofagavebagasseduringbiohydrogenproduction AT germanbuitron roleofxylosefromacidichydrolysatesofagavebagasseduringbiohydrogenproduction
_version_	1718443750978486272

Role of xylose from acidic hydrolysates of agave bagasse during biohydrogen production

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