RT journal article
T1 Olive tree pruning as an agricultural residue for ethanol production. Fermentation of hydrolysates from dilute acid pretreatment.
A1 Díaz Villanueva, Manuel Jesús
A1 Cara-Corpas, Cristobal
A1 Ruiz-Ramos, Encarnación
A1 Romero-Pulido, Inmaculada
A1 Castro, Eulogio
A2 Ingeniería Química y Tecnología de Alimentos
K1 bioethanol
K1 olive tree biomass
K1 pentoses
K1 Pichia stipitis
K1 Pachysolen tannophilus
AB The use of agricultural residues for ethanol production constitutes one of the most promising alternatives from an environmental point of view for substituting fossil fuels in the transport sector. This work deals with the fermentability of hydrolysates obtained from olive tree pruning biomass and the influence of the pH of the culture medium. Hydrolysates of olive tree biomass were obtained by dilute acid pre-treatment of the raw material at 180 °C and 1% (w/v) sulfuric acid concentration. After pretreatment, solid residue and liquid were separated by filtration. The liquid fraction (hydrolysate) was then submitted to detoxification (overliming) before being used as fermentation medium. Pichia stipitis and Pachysolen tannophilus were compared as fermenting microorganisms. Different initial pH values were also tested. The best results in terms of ethanol yield were obtained by P. tannophilus with values as high as 0.44 g ethanol g–1 sugar, and all liquids were fermented, to a different extent. P. stipitis could not ferment hydrolysates with initial pH below 6.5. It was also determined that ethanol production did not improve once glucose in the medium was totally converted, even if other sugars (xylose) were also consumed.
PB Editorial CSIC
SN 2171-9292
YR 2012
FD 2012
LK http://hdl.handle.net/10498/33300
UL http://hdl.handle.net/10498/33300
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 04-nov-2026