Details

Autor(en) / Beteiligte

• Romaní, Aloia
• Morais, Eduarda S.
• Soares, Pedro O.
• Freire, Mara G.
• Freire, Carmen S.R.
• Silvestre, Armando J.D.
• Domingues, Lucília

Titel

Aqueous solutions of deep eutectic systems as reaction media for the saccharification and fermentation of hardwood xylan into xylitol

Ist Teil von

• Bioresource technology, 2020-09, Vol.311, p.123524-123524, Article 123524

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Deep eutectic solvent was evaluated for the development of biomass one step processing.•1:2 [Ch]Cl:Urea molar ratio showed a significant decrease on xylan saccharification.•81% of xylan conversion into xylose was achieved using [Ch]Cl:Urea 1:1.•24 g/L of xylitol was obtained from solubilized xylan in DES by SSF. The aim of this study was to evaluate the effect of aqueous solutions of deep eutectic solvent, Cholinium Chloride:Urea ([Ch]Cl:U) at 50 wt% and 20 wt%, using different molar ratios (1:1, 2:1 and 1:2) on the enzymatic hydrolysis of xylan for xylose production and its subsequent bioconversion into xylitol using a recombinant yeast strain. The lowest xylan conversion into xylose (45%) was obtained using 1:2 [Ch]Cl:U molar ratio. On the other hand, the 1:1 [Ch]Cl:U molar ratio, at 20 wt% in water, improved this conversion, achieving the highest xylose yield (81.4%). The xylitol production was then optimized with [Ch]Cl:U (1:1) at 20 wt% by simultaneous saccharification and fermentation process, attaining 23.67 g/L, corresponding to 66.04% of xylitol yield. This study reveals the possibility of using xylan solubilized in DES aqueous solutions directly for xylitol production, thus assembling a one-step process.