Title:
Fermentation with Candida Guilliermondii Fti 20037 from Hemicellulosic Hydrolysate of Olive Tree Pruning
Author(s):
Puentes, J.G., Mateo, S., Fonseca, B.G., Moya, A.J., Roberto, I., Sánchez, S.
Document(s):
Paper
Poster
Abstract:
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.
Keywords:
agricultural residues, bioethanol, biomass, fermentation, D-xylose, D-glucose, hydrolysis, xylitol
Topic:
Industrial Demonstration and Business Concepts
Subtopic:
Industrial biorefineries and bio-products
Event:
21st European Biomass Conference and Exhibition
Session:
4BV.4.42
Pages:
1696 - 1700
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-4BV.4.42
Price:
FREE
