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Chemical and Biochemical Engineering Quarterly, Vol. 24 No. 3, 2010.

Original scientific paper

Refining Hemp Hurds into Fermentable Sugars or Ethanol

Z. Barta ; Budapest University of Technology and Economics, Department of Applied Biotechnology and Food Science, Szt. Gellért tér 4, 1111 Budapest, Hungary
J. M. Oliva ; CIEMAT, Renewable Energies Division, Biomass Unit, Avda. Complutense n° 22, 28040 Madrid, Spain
I. Ballesteros ; CIEMAT, Renewable Energies Division, Biomass Unit, Avda. Complutense n° 22, 28040 Madrid, Spain
D. Dienes ; Budapest University of Technology and Economics, Department of Applied Biotechnology and Food Science, Szt. Gellért tér 4, 1111 Budapest, Hungary
M. Ballesteros ; CIEMAT, Renewable Energies Division, Biomass Unit, Avda. Complutense n° 22, 28040 Madrid, Spain
K. Réczey ; Budapest University of Technology and Economics, Department of Applied Biotechnology and Food Science, Szt. Gellért tér 4, 1111 Budapest, Hungary

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Abstract

Steam pretreatment is one of the most efficient pretreatment technologies employed prior to enzymatic hydrolysis of lignocellulosics to obtain high polysaccharide conversion.
In this study, steam pretreatment of non-impregnated hemp hurds was investigated at two reactor scales (2 and 10 L) by varying the temperature from 200–230 °C. Glucan recoveries were relatively high (> 82 % of original content), while xylan recoveries ranged from
18–66 % of original. Conversions of glucan and xylan in enzymatic hydrolysis varied between X = 62–83 % and 46–96 %, respectively, based on glucan and xylan contents of the substrate. Ethanol yields in simultaneous saccharification and fermentation ranged from
Y = 38–70 %, based on glucan and mannan contents of the substrate. The highest overall glucose yield was 336 g kg–1 dry hurds obtained at 210 °C, whereas the maximum sugar
yield (glucose + xylose), 414 g kg–1 dry hurds, was achieved at 200 °C. The highest ethanol yield, 141 g kg–1 dry hurds, was obtained at 210 °C.

Keywords

Hemp hurds; steam pretreatment; enzymatic hydrolysis; SSF; ethanol production

Hrčak ID:

59070

URI

https://hrcak.srce.hr/59070

Publication date:

30.9.2010.

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