High solid concentrations during the hydrothermal pretreatment of eucalyptus accelerate hemicellulose decomposition and subsequent enzymatic glucose production
| Autor: | Shinji Fujimoto, Masaru Yoshida, Seiichi Inoue |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
chemistry.chemical_classification Environmental Engineering Renewable Energy Sustainability and the Environment 020209 energy Bioengineering 02 engineering and technology 01 natural sciences Decomposition Hydrothermal circulation chemistry.chemical_compound Acetic acid Enzyme chemistry 010608 biotechnology Enzymatic hydrolysis Yield (chemistry) 0202 electrical engineering electronic engineering information engineering Hemicellulose Cellulose Waste Management and Disposal Nuclear chemistry |
| Zdroj: | Bioresource Technology Reports. 4:16-20 |
| ISSN: | 2589-014X |
| Popis: | To improve the cost and energy efficiencies of glucose production from eucalyptus, we investigated the effect of solid concentration on hemicellulose decomposition during hydrothermal pretreatment, and the subsequent enzymatic production of glucose. The effect of reduced water use during hydrothermal pretreatment prior to enzymatic hydrolysis was examined, which led to relatively concentrated reaction conditions. Pretreatments were conducted at 200 °C with various solid concentrations (9–50 wt%) and severity factors (SF = 4.22 and 4.52). Acetic acid generated through hemicellulose deacetylation increased with increasing solid concentration and SF. Higher levels of acetic acid promoted hemicellulose decomposition during hydrothermal pretreatment through hemicellulose autohydrolysis. The maximum glucose yield following enzymatic hydrolysis was 436.7 mg/g-Eu, which was observed at the highest solid concentration and SF values (50 wt% and 4.52, respectively). We ascribe the observed enhancement to efficient hemicellulose decomposition during pretreatment, which improves enzyme access to the cellulose surface during enzymatic hydrolysis. |
| Databáze: | OpenAIRE |
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