Title:
Enhanced Simultaneous Saccharification and Fermentation of Olive Stone by Organosolv Delignification
Author(s):
Cuevas, M., Sánchez, S., Bravo, V., Cruz, N., García, J.F., Baeza, J., Parra, C., Freer, J.
Document(s):
Paper
Abstract:
During this research the conversion of olive stones to ethanol was examined. Olive stones in fragments were pretreated at high temperatures by using four different solutions: liquid hot water (LHW), ethanol and water (E&LHW), diluted sulphuric acid (DA) and, finally, ethanol and diluted sulphuric acid (E&DA). LHW and DA pretreatments produced an important depolymerisation of hemicelluloses, but in the pretreated solids remained a considerable quantity of insoluble lignin. When ethanol was present in pretreatments (organosolv process: E&LHW and E&DA), the cellulose content significantly increased in the pre-treated solids. After pretreatments, the solids were subjected to Simultaneous Saccharification and Fermentation (SSF) using a commercial cellulase-.-glucosidase mixture and the thermal acclimated yeast Saccharomyces cerevisiae IR2T9. Under the best conditions, the ethanol concentration reached 51.8 . 1.1 kg/m3, the ethanol yield was 13.5 . 0.3 kg per 100 kg OS and a percentage of ethanol (in relation to the theoretical maximum quantity of ethanol from the cellulose of the pretreated solid) close to 100% was obtained.
Keywords:
agroindustrial residues, bioethanol, fermentation, hydrolysis, olive tree, pretreatment
Topic:
Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Biochemical conversion
Event:
19th European Biomass Conference and Exhibition
Session:
VP2.6.29
Pages:
1764 - 1768
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-VP2.6.29
Price:
FREE
