Paper details

Title:

Bioethanol Production from Jerusalem Artichoke Stalks

Author(s):

Ballesteros, I., Manzanares, P., Negro, M.J., Oliva, J.M., Sáez, F., Ballesteros, M.

Document(s):

Abstract:

In this work ethanol production from soluble and structural carbohydrates present in the stalks of Jerusalem artichoke was tested. The soluble sugars were extracted with water in a column system at 60ºC, solid­liquid ratio (1/3) and residence time of 20 minutes. In these conditions an extraction efficiency of 74% was obtained, corresponding to 91,7 g/L sugars concentration. Direct fermentation of liquid using Kluyveromyces marxianus CECT 10875, yielded 34.5 g/L ethanol concentration (0.38 ethanol yield) in 18 hours. The lignocellulosic bagasse, obtained after water extraction, was pretreated in a Steam Explosion Pilot Plant at 230ºC and 12 min of residence time. This pretreated material was used for ethanol production in a SSF process using Saccharomyces cerevisiae. An ethanol concentration of 35 g/L was obtained at 15% (w/v) of solid loading, corresponding to an ethanol yield of 0.40 g ethanol/ g glucose. This process achieved a 59% of theoretical ethanol yield of all C-6 contained in Jerusalem artichoke stalks.

Keywords:

lignocellulose, steam explosion, sugar crops, inulin

Topic:

Biological conversion - Fermentation, enzymatic processes

Subtopic:

Biological conversion - fermentation, enzymatic processes

Event:

18th European Biomass Conference and Exhibition

Session:

VP2.6.39

Pages:

1436 - 1439

ISBN-13:

978-88-89407-56-1

ISBN-10:

88-89407-56-5

Paper DOI:

10.5071/18thEUBCE2010-VP2.6.39

Price:

FREE