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Article

Acid-Assisted Organosolv Pre-Treatment and Enzymatic Hydrolysis of Cynara cardunculus L. for Glucose Production

1
CIRIAF (Inter-University Research Center on Pollution and Environment “Mauro Felli”), Biomass Research Centre, University of Perugia, via G. Duranti 63, 06125 Perugia, Italy
2
University of Tuscia, Largo dell’Università, s.n.c., Loc. Riello, 01100 Viterbo, Italy
*
Author to whom correspondence should be addressed.
Energies 2020, 13(16), 4195; https://doi.org/10.3390/en13164195
Received: 9 July 2020 / Revised: 4 August 2020 / Accepted: 7 August 2020 / Published: 13 August 2020
Lignocellulosic biomass is a non-edible feedstock that can be used in integrated biorefinery for the production of biochemicals and biofuel. Among lignocellulosic biomass, Cynara cardunculus L. (cardoon) is a promising crop thanks to its low water and fertilizer demand. Organosolv is a chemical treatment that uses numerous organic or aqueous solvent mixtures, and a small amount of acid catalyst, in order to solubilize the lignin and hemicellulose fractions, making the cellulose accessible to hydrolytic enzymes. Lignocellulosic residues of cardoon underwent a two-step treatment process to obtain fermentable glucose. In the first step, the milled biomass was subjected to microwave-assisted extraction using an acidified γ-valerolactone (GVL)/water mixture, yielding a solid cellulose pulp. In the second step, the pre-treated material was hydrolyzed by cellulolytic enzymes to glucose. The first step was optimized by means of a two-level full factorial design. The investigated factors were process temperature, acid catalyst concentration, and GVL/water ratio. A glucose production equal to 30.17 g per 100 g of raw material (89% of the maximum theoretical yield) was achieved after conducting the first step at 150 °C using an acidified water solution (1.96% H2SO4w/w). View Full-Text
Keywords: Cynara Cardunculus L.; organosolv pre-treatment; enzymatic hydrolysis; γ-valerolactone Cynara Cardunculus L.; organosolv pre-treatment; enzymatic hydrolysis; γ-valerolactone
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MDPI and ACS Style

Gelosia, M.; Bertini, A.; Barbanera, M.; Giannoni, T.; Nicolini, A.; Cotana, F.; Cavalaglio, G. Acid-Assisted Organosolv Pre-Treatment and Enzymatic Hydrolysis of Cynara cardunculus L. for Glucose Production. Energies 2020, 13, 4195. https://doi.org/10.3390/en13164195

AMA Style

Gelosia M, Bertini A, Barbanera M, Giannoni T, Nicolini A, Cotana F, Cavalaglio G. Acid-Assisted Organosolv Pre-Treatment and Enzymatic Hydrolysis of Cynara cardunculus L. for Glucose Production. Energies. 2020; 13(16):4195. https://doi.org/10.3390/en13164195

Chicago/Turabian Style

Gelosia, Mattia, Alessandro Bertini, Marco Barbanera, Tommaso Giannoni, Andrea Nicolini, Franco Cotana, and Gianluca Cavalaglio. 2020. "Acid-Assisted Organosolv Pre-Treatment and Enzymatic Hydrolysis of Cynara cardunculus L. for Glucose Production" Energies 13, no. 16: 4195. https://doi.org/10.3390/en13164195

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