Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 4, Pages 3861-3868Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.12.038
Keywords
Biofuels; Biomass conversion; Lignocellulose; Lime; Sodium hydroxide
Funding
- North Carolina Agricultural Research Service (NCARS)
- North Carolina Agricultural Foundation (NCAF)
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Sodium hydroxide (NaOH) and lime (Ca(OH)(2)) were innovatively used together in this study to improve the cost-effectiveness of alkaline pretreatment of switchgrass at ambient temperature. Based on the sugar production in enzymatic hydrolysis, the best pretreatment conditions were determined as: residence time of 6 h, NaOH loading of 0.10 g/g raw biomass, NaOH addition at the beginning, Ca(OH)(2) loading of 0.02 g/g raw biomass, and biomass wash intensity of 100 ml water/g raw biomass, at which the glucose and xylose yields were respectively 59.4% and 57.3% of the theoretical yields. The sugar yield of the biomass pretreated using the combination of 0.10 g NaOH/g raw biomass and 0.02 g Ca(OH)(2)/g raw biomass was found comparable with that of the biomass pretreated using 0.20 g NaOH/g raw biomass at the same conditions, while the chemical expense was remarkably reduced due to the low cost of lime and the reduced loading of NaOH. (C) 2010 Elsevier Ltd. All rights reserved.
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