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Fermentation of olive tree pruning acid-hydrolysates by Pachysolen tannophilus

Paper ID Volume ID Publish Year Pages File Format Full-Text
4801 246 2007 8 PDF Available
Title
Fermentation of olive tree pruning acid-hydrolysates by Pachysolen tannophilus
Abstract

The influence of hydrolysis conditions on the fermentation of hydrolysates obtained from olive tree pruning (a renewable, low cost, largely available agricultural residue) is analyzed in this work. Hydrolysis was performed using sulfuric acid at atmospheric pressure (90 °C) in a concentration range of 0.5–4N for 240 min. The fermentation of hydrolysates was carried out by Pachysolen tannophilus in a discontinuous tank bioreactor at 30 °C and pH 3.5. The main fermentation parameters determined in this study include maximum specific growth rate, biomass productivity, specific substrate consumption rate, specific ethanol production rate, and ethanol and xylitol yields. The results show that ethanol yields are much higher than xylitol yields under all the conditions tested. The maximum ethanol yield (0.38 g/g) is reached with the hydrolysate obtained with 0.75N sulfuric acid. Under these conditions the conversion of the hemicellulose fraction is 92%.

Keywords
Olive tree pruning; Bioconversion; Fermentation; Pachysolen tannophilus; Ethanol; Bioreactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 36, Issue 2, 15 September 2007, Pages 108–115
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us