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Description: Sweet sorghum and sweet pearl millet are promising bioenergy crops. The juice extracted from their stalks can be easily fermented to ethanol. However, the bagasse (pressing residue) is a lignocellulosic material that needs extra treatment to liberate fermentable sugars. The objective of this study was to test the effect of acid and alkali pretreatment on the enzymatic saccharification of sweet sorghum and sweet pearl millet bagasse. Sulphuric acid and sodium hydroxide at two concentrations (1% and 2%) were used for bagasse pretreatment at 121?C for 60 min. Two particle sizes (5-15 mm and 1 mm) of the bagasse were investigated. The pretreated bagasses were further subjected to enzymatic saccharification. Sugars released after the pretreatment and the enzymatic saccharification were quantified by HPLC. Obtained results showed that the pretreatment of the bagasse with sulphuric acid allowed releasing structural sugars (glucose, xylose, galactose, arabinose, and mannose). However, almost no sugars were released with sodium hydroxide pretreatment. Enzymatic saccharification data are currently under analysis.

Keywords: Preatreatmant, enzymatic saccharification, sweet sorghum, sweet pearl millet, sugars
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Date: 2019-07-15
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Conference name: CSBE/SCGAB 2019 Annual Conference, Vancouver, BC, 14-17 July 2019.
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Type: Poster
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Publication type: Text.Abstract
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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