Monday, April 30, 2007

Xylanase supplementation during saccharification of corn stover and poplar

Renata Bura1, Richard Chandra2, and Jack N. Saddler2. (1) College of Forest Resources, University of Washington, Winkwnwerder 104, Seattle, WA 98195-2100, (2) Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada

A commercially-viable biomass to ethanol conversion process should provide maximum sugar recovery (five and six carbons) in a form that can be easily hydrolysed and fermented. In an effort to increase overall sugar recovery, we explored the possibility of using water soluble and insoluble streams of steam exploded corn stover and poplar, supplemented with a mixture of cellulases, β-glucosidases and xylanases during saccharification experiments.

In this study, the steam explosion experiments were performed at 190°C and 5 minutes, and 200°C, 5 min and 3% SO2 for corn stover and hybrid poplar, respectively. Overall improvements in converting xylan to xylose and cellulose to glucose for water soluble and insoluble streams will be discussed.