1. Integration of Pretreatment With Simultaneous Counter-Current Extraction of Energy Sorghum for High-Titer Mixed Sugar Production
- Author
-
John E. Mullet, David B. Hodge, Daniel L. Williams, and Rebecca G. Ong
- Subjects
Economics and Econometrics ,sucrose extraction ,Sucrose ,020209 energy ,Energy Engineering and Power Technology ,Biomass ,cellulosic biofuels ,lcsh:A ,02 engineering and technology ,Xylose ,chemistry.chemical_compound ,0202 electrical engineering, electronic engineering, information engineering ,Sugar ,decentralized biorefining ,Renewable Energy, Sustainability and the Environment ,Extraction (chemistry) ,food and beverages ,pretreatment ,021001 nanoscience & nanotechnology ,Pulp and paper industry ,Fuel Technology ,chemistry ,Cellulosic ethanol ,Biofuel ,sorghum ,lcsh:General Works ,0210 nano-technology ,Bagasse - Abstract
Sorghum (Sorghum bicolor L. Moench) offers substantial potential as a feedstock for the production of sugar-derived biofuels and biochemical products from cell wall polysaccharides (i. e., cellulose and hemicelluloses) and water-extractable sugars (i.e., glucose, fructose, sucrose, and starch). A number of preprocessing schemes can be envisioned that involve processes such as sugar extraction, pretreatment, and densification that could be employed in decentralized, regional-scale biomass processing depots. In this work, an energy sorghum exhibiting a combination of high biomass productivity and high sugar accumulation was evaluated for its potential for integration into several potential biomass preprocessing schemes. This included counter-current extraction of water-soluble sugars followed by mild NaOH or liquid hot water pretreatment of the extracted bagasse. A novel processing scheme was investigated that could integrate with current diffuser-type extraction systems for sugar extraction. In this approach, mild NaOH pretreatment (i.e., 8%) at high metabolic yields without detoxification using a Saccharomyces cerevisiae strain metabolically engineered and evolved to ferment xylose.
- Published
- 2019
- Full Text
- View/download PDF