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On Polydispersity of Plant Biomass Recalcitrance and Its Effects on Pretreatment Optimization for Sugar Production |
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| Authors: | J. Y. Zhu Steve P. Verrill Hao Liu Victoria L. Herian Xuejun Pan Donald L. Rockwood |
| Affiliation: | 1. USDA Forest Service, Forest Products Laboratory, Madison, WI, USA 3. Department of Biological Systems Engineering, University of Wisconsin, Madison, WI, USA 2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China 4. School of Forest Resources and Conservation, University of Florida, Gainesville, FL, USA |
| Abstract: | This paper discusses a property associated with plant biomass recalcitrance to enzyme and microbial deconstructions in sugar production from cellulose and hemicelluloses. The hemicelluloses are more readily hydrolyzed to sugars than is cellulose. As a result, optimization to maximize individual glucose and hemicellulose sugar recovery is not possible. This property is an inherent feature of plant biomass and is named polydispersity of plant biomass recalcitrance (PPBR) in this study. A set of pretreatment experiments using eucalyptus and sulfite pretreatment to overcome recalcitrance of lignocelluloses was conducted. The results were used to predict the conditions for individually maximizing enzymatic glucose and xylose yields. The predicted maximal yields were used to quantitatively illustrate the PPBR concept. The effect of PPBR on pretreatment optimization and strategies for maximal sugar recovery using two-stage pretreatment are discussed. |
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