Journal
RENEWABLE ENERGY
Volume 74, Issue -, Pages 839-847Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2014.09.004
Keywords
Fuel-ethanol; Olive stones; Organosolv delignification; Pretreatment; Simultaneous saccharification and fermentation
Funding
- Consejeria de Innovacion, Ciencia y Empresa, Junta de Andalucia, Spain
- Iberoamerican University Postgraduate Association
- [01272/2005]
- [AGR/6509]
Ask authors/readers for more resources
Olive stones are an agro-industrial by-product in Mediterranean countries that can be regarded as a potential source of bio-fuels and bioactive compounds. In this work, olive stones were pretreated with liquid hot water (LHW), dilute sulphuric acid (DSA) and organosolv delignification at temperatures in the range 190 degrees C-230 degrees C. The resulting solids from pretreatments were subjected to simultaneous saccharification and fermentation (SSF) with the yeast Saccharomyces cerevisiae IR2-9a for fuel-ethanol production. The composition of prehydrolysates from LHW and DSA pretreatments were strongly dependent of reactor temperature. The highest yields of D-xylose (0.21 kg kg(-1)) and a-glucose (0.11 kg kg(-1)) were achieved in DSA assays at 200 degrees C and 230 degrees C, respectively, while LHW processes provided the maximum oligosaccharide recovery (0.17 kg kg(-1)) at 210 degrees C. The addition of sulphuric acid in organosolv pretreatments was particularly effective to increase the cellulose content of the pretreated solids till percentages close to 83%. Finally, the maximum ethanol concentration achieved by SSF was 47.1 kg m(-3), and 13 kg ethanol were obtained from 100 kg of raw material. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available