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International Journal of Chemical Engineering
Volume 2014 (2014), Article ID 684296, 9 pages
http://dx.doi.org/10.1155/2014/684296
Research Article

Experimental Study on Calcium Hydroxide-Assisted Delignification of Hydrothermally Treated Sweet Sorghum Bagasse

1Department of Bioresource Engineering, McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue, QC, Canada H9X 3V9
2Department of Plant Science, McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue, QC, Canada H9X 3V9
3Department of Food Science, McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue, QC, Canada H9X 3V9

Received 27 March 2014; Accepted 17 July 2014; Published 2 September 2014

Academic Editor: Diego T. Santos

Copyright © 2014 Jiby Kudakasseril Kurian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The hydrothermally treated sweet sorghum bagasse (SSB) powder was treated using Ca(OH)2 to extract the lignin from it. Changes in chemical composition of SSB and the formation of sugars and hydrolytic products were studied. The optimum conditions of 10% (g/g substrate) Ca(OH)2 and 106.3 min of isothermal treatment residence time at 394 K resulted in 69.67 ± 1.26% of the lignin extracted from the hydrothermally treated SSB powder, producing a solid residue containing 68.29 ± 0.31% residual cellulose and 13.26 ± 0.32% residual lignin in it. The Ca(OH)2 concentration and isothermal treatment residence time were significant in the responses observed. Treatment using Ca(OH)2 is one of the potential processes for the on-farm processing of lignocellulosic materials.