Paper details

Title:

Simultaneous Saccharification and Fermentation of Diluted-Acid Pretreated Olive-Pruning Debris for Ethanol Production

Author(s):

Cuevas, M., Sánchez, S., Bravo, V., García, J.F., Baeza, J., Parra, C., Freer, J.

Document(s):

Abstract:

This study investigates the effect of pre­treatment conditions: maximum temperature (range 423.15 K­ 483.15 K) and sulphuric­acid concentration (interval 0.002­0.059 kmol/m3) on fuel­ethanol production from simultaneous saccharification and fermentation (SSF) of olive­pruning debris by Saccharomyces cerevisiae IR2­9a. The influence of these two variables was determined by using a response­surface methodology. Cellulose percentage in pre­treated solids reached a maximum of 71.6% of the content in raw material at 483.15 K and 0.010 kmol/m3 of acid concentration. The conversion of hemicellulose into monosaccharides and oligosaccharides also was analyzed. For ethanol generation, the bio­fuel yield (maximum of 9.6 kg from 100 kg olive­pruning debris), and volumetric ethanol productivity (maximum of 0.27 kg/(m3 h)), strongly depended on pre­treatments conditions. According to statistical optimization, the highest ethanol yield (9.9 kg ethanol from 100 kg olive­pruning debris) is achieved at 480.15 K using a catalyst concentration of 0.016 kmol/m3. A maximum overall process yield of 15.3 kg ethanol/100 kg olive­pruning debris may result when taking into account ethanol from SSF and D­glucose present in the pre­ hydrolysate, assuming its theoretical conversion.

Keywords:

bioethanol, fermentation, saccharification, olive pruning debris, SSF, S. cerevisiae, diluted-acid pretreatment

Topic:

Fuels from biomass

Subtopic:

Production, supply and use of liquid biofuels from starch and sugar feedstocks

Event:

18th European Biomass Conference and Exhibition

Session:

VP3.2.11

Pages:

1759 - 1763

ISBN-13:

978-88-89407-56-1

ISBN-10:

88-89407-56-5

Paper DOI:

10.5071/18thEUBCE2010-VP3.2.11

Price:

FREE