10.5071/21STEUBCE2013-4BV.4.42
Puentes, J.G.
J.G.
Puentes
Mateo, S.
S.
Mateo
Fonseca, B.G.
B.G.
Fonseca
Moya, A.J.
A.J.
Moya
Roberto, I.
I.
Roberto
Sánchez, S.
S.
Sánchez
Fermentation with Candida Guilliermondii Fti 20037 from Hemicellulosic Hydrolysate of Olive Tree Pruning
ETA-Florence Renewable Energies
2013
Conference paper
Biomass
2013
en
978-88-89407-53-0
2282-5819
5 Pages
application/pdf
Proceedings of the 21st European Biomass Conference and Exhibition, 3-7 June 2013, pp. 1696-1700
Bioproducts production is nowadays a biotechnological alternative for hemicellulosic fraction from agricultural wastes. At the moment, the main residue of olive culture is the pruning debris and it is usually burned on the farmlands with a great negative environmental impact. The pruning is a work operation that is realized each year in Spain from 2.5 106 ha of olive-trees. Consequently, a biotechnological alternative is possible due the chemical composition of olive tree pruning (40.8% cellulose, 27.9% hemicellulose and 16.4% lignin). The main objective of this study was to evaluate the behaviour of Candida guilliermondii FTI 20037 with olive tree pruning hemicellulosic hydrolysate supplemented or not with different media: Cortez, Lindegren, synthetic medium with Cortez supplement, synthetic medium with Lindegren supplement and no supplemented hydrolysate. The fermentations were monitored through periodic sampling to determine biomass formation, D-glucose and D-xylose consumption, and ethanol and xylitol production. A comparative study on ethanol and xylitol production was carried out in different scenarios. In all fermentation cases, D-glucose is consumed to ethanol and then xylitol is generated from D-xylose. The best results were obtained using Lindegren medium as hydrolysate supplement and obtaining ethanol and xylitol yields of 0.38 kg/kgGlucose+Xylose and 0.31 kg/kgXylose respectively.
Proceedings of the 21st European Biomass Conference and Exhibition, 3-7 June 2013, Copenhagen, Denmark, pp. 1696-1700