Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 10, Pages 6254-6259Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.02.075
Keywords
Soybean straw; Liquid hot water; Alkaline pretreatment; Cellulose digestibility
Funding
- North Central Sun Grant Program [GRT00013735]
- USDA [NIFA 1890]
- Ohio Agricultural Research and Development Center
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Soybean straw was pretreated with either liquid hot water (LHW) (170-210 degrees C for 3-10 min) or alkaline soaking (4-40 g NaOH/100 g dry straw) at room temperature to evaluate the effects on cellulose digestibility. Nearly 100% cellulose was recovered in pretreated solids for both pretreatment methods. For LHW pretreatment, xylan dissolution from the raw material increased with pretreatment temperature and time. Cellulose digestibility was correlated with xylan dissolution. A maximal glucose yield of 70.76%, corresponding to 80% xylan removal, was obtained with soybean straw pretreated at 210 degrees C for 10 min. NaOH soaking at ambient conditions removed xylan up to 46.37% and the subsequent glucose yield of pretreated solids reached up to 64.55%. Our results indicated LHW pretreatment was more effective than NaOH soaking for improving cellulose digestibility of soybean straw. (C) 2011 Elsevier Ltd. All rights reserved.
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