The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Evaluation of Steam-Treated Giant Bamboo for Production of Fermentable Sugars

På svenska

Author

Summary, in English

Giant bamboo plantations are currently being established in the Southern Africa region and can be considered as potential lignocellulosic feedstock for the production of second generation bioethanol. In this study, giant bamboo internodal material was subjected to sulphur dioxide (SO2) impregnated steam pretreatment prior to enzymatic hydrolysis. The effect of temperature, residence time, and acidity on the overall sugar recovery and byproduct formation was studied using response surface response technology according to a central composite experimental design (CCD) at a fixed SO2 concentration of 2.5% (w/w liquid) after impregnation. The results showed that pretreatment conditions with combined severity factor (CSF) values and enzyme dosages greater than 1.72 and 30 FPU/g water insoluble solid, respectively, were required to obtain an efficient glucan digestibility and a good overall glucose recovery. Up to 81.2% of the sugar in the raw material was recovered for a CSF of 2.25. However, considering overall sugar yield and byproducts concentration, the pretreated material obtained with a CSF of 1.62 can be considered as the most appropriate for SSF experiments using a xylose-utilizing yeast. At these conditions, it could be possible to obtain up to 247 L of ethanol per dry ton of giant bamboo considering hexose and pentose sugars fermentation. This amount could be increased up to 292 L of ethanol per dry ton of giant bamboo with the maximum sugar yield obtained (CSF 2.25) if the microorganism possesses robust fermentative characteristics as well as a high resistance to pretreatment by-products. (C) 2011 American Institute of Chemical Engineers Biotechnol. Prog., 27: 641-649, 2011

Publishing year

2011

Language

English

Pages

641-649

Publication/Series

Biotechnology Progress

Volume

27

Issue

3

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Chemical Engineering

Keywords

  • bamboo
  • SO2-catalyzed steam pretreatment
  • combined severity factor
  • enzymatic hydrolysis
  • bioethanol

Status

Published

ISBN/ISSN/Other

  • ISSN: 1520-6033