Evaluation of the detoxification of brewery’s spent grain hydrolysate for xylitol production by Debaryomyces hansenii CCMI 941

Carvalheiro, Florbela; Duarte, Luís C.; Lopes, Sonia T.A.; Parajó, Juan Carlos; Pereira, Helena; Gı́rio, Francisco M.

doi:10.1016/j.procbio.2004.04.015

Cited by 141 publications

(125 citation statements)

References 48 publications

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“…It is known that the presence of arabinose induces the enzyme xylose reductase and stimulates the yield and productivity of the xylose-to-xylitol bioconversion (18). A low consumption of acetic acid has previously been reported to improve the microbial growth (5). In the present study, a high cell concentration (7.2 g/ L) was observed at the end of the assay.…”

supporting

confidence: 51%

Xylitol production from wheat straw hemicellulosic hydrolysate: hydrolysate detoxification and carbon source used for inoculum preparation

Canilha¹,

Carvalho²,

Felipe³

et al. 2008

Braz. J. Microbiol.

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supporting

confidence: 51%

Xylitol production from wheat straw hemicellulosic hydrolysate: hydrolysate detoxification and carbon source used for inoculum preparation

Canilha¹,

Carvalho²,

Felipe³

et al. 2008

Braz. J. Microbiol.

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“…However, the detoxification with activated charcoal was much more effective for acetic acid, furfural and HMF than the detoxification with ion-exchange resin (reductions of 45% vs 22%, 93% vs 68% and 75% vs 25%, respectively). Carvalheiro et al (2005) achieved similar reductions of furans by treating hemicellulosic hydrolysates from brewery´s spent grain hydrolysates with ion-exchange resins. Lee et al (2011) achieved also nearly complete adsorption of furfural by activated charcoal in woody hydrolysates.…”

Section: Prehydrolysate Detoxificationmentioning

confidence: 91%

Hemicellulose-derived sugars solubilisation of rape straw. Cofermentation of pentoses and hexoses by Escherichia coli

López-Linares

Cara-Corpas

Ruiz

et al. 2015

Span. j. agric. res.

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Bioconversion of hemicellulose sugars is essential for increasing fuel ethanol yields from lignocellulosic biomass. We report for the first time with rape straw, bioethanol production from hemicellulose sugars. Rape straw was pretreated at mild conditions with sulfuric acid to solubilize the hemicellulose fraction. This pretreatment allows obtaining a prehydrolysate, consisting basically in a solution of monomeric hemicellulosic sugars, with low inhibitor concentrations. The remaining water insoluble solid constitutes a cellulose-enriched, free of extractives material. The influence of temperature (120ºC and 130ºC), acid concentration (2-4% w/v) and pretreatment time (30-180 min) on hemicellulose-derived sugars solubilisation was evaluated. The highest hemicellulosic sugars recovery, 72.3%, was achieved at 130ºC with 2% sulfuric acid and 60 min. At these conditions, a concentrated sugars solution, 52.4 g/L, was obtained after three acid consecutive contacts, with 67% xylose and acetic acid concentration above 4.5 g/L. After a detoxification step by activated charcoal or ion-exchange resin, prehydrolysate was fermented by ethanologenic Escherichia coli. An alcoholic solution of 25 g/L and 86% of theoretical ethanol yield was attained after 144 h when the prehydrolysate was detoxified by ion-exchange resin. The results obtained in the present work show sulfuric acid pretreatment under mild conditions and E. coli as an interesting process to exploit hemicellulosic sugars in rape straw.Additional key words: agricultural residue; acid pretreatment; xylose; E. coli; bioethanol production

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“…During this stage, there were decreases of 39.75 and 29.06% in the acetic acid concentrations of the hydrolysates treated with resins or activated charcoal, respectively. The detoxification of brewery's spent grain hydrolysate with Dowex MWA1 anionic resin was reported by Carvalheiro et al (2005). According to these authors, the hydrolysate treatment without previous pH adjustment was the method that removed the largest quantity of inhibitory compounds.…”

Section: Fermentations In Erlenmeyer Flasksmentioning

confidence: 99%

Influence of the use of rice bran extract as a source of nutrients on xylitol production

Martínez

Santos

2012

Food Sci. Technol

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Xylose-to-xylitol bioconversion using 2.5 or 10% (v/v) rice bran extract was performed to verify the influence of this source of nutrients on Candida guilliermondii metabolism. Semisynthetic medium (SM) and sugarcane bagasse hemicellulosic hydrolysate detoxified with ion-exchange resins (HIE) or with alteration in pH combined with adsorption onto activated charcoal (HAC) were fermented in 125 mL Erlenmeyer flasks at 30 ºC and 200 rpm for 72 hours. Activated charcoal supplemented with 2.5% (v/v) rice bran extract was fermented by C. guilliermondii in a MULTIGEN stirred tank reactor using pH 5.0 and 22.9/hour oxygen transfer volumetric coefficient. Higher values of xylitol productivity (0.70, 0.71, and 0.62 g.Lh-1) and xylose-to-xylitol conversion yield (0.71, 0.69, and 0.63 g.g-1) were obtained with 2.5% (v/v) rice bran in semisynthetic medium, ion-exchange resins, and activated charcoal, respectively. Moreover, during batch fermentation, the xylitol volumetric productivity and fermentation efficiency values obtained were 0.53 g.Lh-1 and 61.1%, respectively.

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Evaluation of the detoxification of brewery’s spent grain hydrolysate for xylitol production by Debaryomyces hansenii CCMI 941

Cited by 141 publications

References 48 publications

Xylitol production from wheat straw hemicellulosic hydrolysate: hydrolysate detoxification and carbon source used for inoculum preparation

Xylitol production from wheat straw hemicellulosic hydrolysate: hydrolysate detoxification and carbon source used for inoculum preparation

Hemicellulose-derived sugars solubilisation of rape straw. Cofermentation of pentoses and hexoses by Escherichia coli

Influence of the use of rice bran extract as a source of nutrients on xylitol production

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