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Case studies on sugar production from underutilized woody biomass using sulfite chemistryAuthor(s): J.Y. Zhu; M. Subhosh Chandra; Roland Gleisner; William Gilles; Johnway Gao; Gevan Marrs; Dwight Anderson; John Sessions
Source: Tappi Journal. 14(9): 577-583.
Publication Series: Scientific Journal (JRNL)
Station: Forest Products Laboratory
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DescriptionWe examined two case studies to demonstrate the advantages of sulfite chemistry for pretreating underutilized woody biomass to produce sugars through enzymatic saccharification. In the first case study, we evaluated knot rejects from a magnesium-basedsulfite mill for direct enzymatic sugar production.We found that the sulfite mill rejects are an excellent feedstock for sugar production. In the second study, we presented SPORL (sulfite pretreatment to overcome the recalcitrance of lignocelluloses),a sulfite pretreatment process based on modified sulfite pulping for robust bioconversion of softwood forest residues. Sulfite pulping technology is well developed, with proven commercial scalability, and sulfite pretreatment is a strong contender for commercial adoption.
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CitationZhu, J.Y.; Chandra, M. Subhosh; Gleisner, Roland; Gilles, William; Gao, Johnway; Marrs, Gevan; Anderson, Dwight; Sessions, John. 2015. Case studies on sugar production from underutilized woody biomass using sulfite chemistry. Tappi Journal. 14(9): 577-583.
KeywordsForest residues, ethanol, pretreatment, high solids, enzymatic saccharification and fermentation
- Robust and efficient enzymatic saccharification of softwoods by SPORL
- Evaluation energy efficiency of bioconversion knot rejects to ethanol in comparison to other thermochemically pretreated biomass
- Multistep process to produce fermentable sugars and lignosulfonates from softwood enzymolysis residues
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