Journal
BIORESOURCE TECHNOLOGY
Volume 249, Issue -, Pages 189-195Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.09.207
Keywords
Lignosulfonate; Xylo-oligosaccharide; Macroporous resin; Ion-exchange; Recovery
Funding
- National Natural Science Foundation of China [51561145015]
- Natural Science Foundation of Jiangsu Higher Education of China [16KJA220004]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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For wheat straw, an ideal bio-refinery process is that all three major components of biomass could be efficiently utilized to make high value chemicals, MBSP could directly convert the hemicelluloses and lignin into xylo-oligosaccharides and lignosulfonate. However, these value-added compounds still present in spent liquor and thus should be isolated as an individual product. In present work, a simple and efficient ion exchange process was developed for separating xylo-oligosaccharides and lignosulfonate simultaneously from spent liquor. D354 resin was selected for its high adsorption capacity of magnesium lignosulfonate and remarkable selectivity. 93.09% of XOS and 98.03% of lignosulfonate were recovered from the treated spent liquor in a fixed bed column with D354 resin. Overall, 1 L of MBSP spent liquor could coproduce 9.5 g XOS and 74 g lignosulfonate. These results offer an opportunity for complete and effective utilization of biomass by a novel integrated process coupling of MBSP and ion-exchange process.
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