RT journal article
T1 Hydrothermal pre-treatment and enzymatic hydrolysis of sunflowers stalks
A1 Díaz Villanueva, Manuel Jesús
A1 Cara-Corpas, Cristobal
A1 Ruiz-Ramos, Encarnación
A1 Pérez-Bonilla, Mercedes
A1 Castro, Eulogio
A2 Ingeniería Química y Tecnología de Alimentos
K1 Agricultural residues
K1 enzymatic hydrolysis
K1 ethanol
K1 hydrothermal pretreatment
K1 sunflower stalks
AB The production of fermentable sugars by biochemical conversion of pretreated sunflower stalks is studied in this work. Liquid hot water pre-treatment, in a temperature range from 180 to 230ºC was used. After pre-treatment, solid residue and liquid fractions are separated by filtration. Pretreated solids are further submitted to enzymatic hydrolysis for glucose release using a commercial enzyme preparation. Enzymatic hydrolysis yields show that 90% glucose conversion can be obtained after 72 h enzyme action on pretreated sunflower stalks at 220ºC. Nevertheless, under such pre-treatmentconditions most of the hemicellulosic sugars are lost due to solubilisation and degradation reactions. Taking into account all sugars that can be obtained from this agricultural residue, the best results in terms of potential ethanol production is found when pretreating sunflower stalks at 190ºC. The characterization of hydrolysate composition is also discussed as inhibitor compounds are also found in liquid fractions issued from pre-treatment.
PB Elsevier
SN 0016-2361
YR 2011
FD 2011
LK http://hdl.handle.net/10498/33301
UL http://hdl.handle.net/10498/33301
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 04-nov-2026