Optimization of various pretreatments condition of kenaf core ( Hibiscus cannabinus ) fibre for sugar production: Effect of chemical compositions of pretreated fibre on enzymatic hydrolysability
| Autor: | Cheu Peng Leh, Ying Ying Tye, Keat Teong Lee, Wan Nadiah Wan Abdullah |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
biology
Renewable Energy Sustainability and the Environment 020209 energy Core (manufacturing) 02 engineering and technology biology.organism_classification Pulp and paper industry Hibiscus Kenaf chemistry.chemical_compound chemistry Biochemistry Enzymatic hydrolysis Yield (chemistry) 0202 electrical engineering electronic engineering information engineering Lignin Hemicellulose Response surface methodology |
| Zdroj: | Renewable Energy. 99:205-215 |
| ISSN: | 0960-1481 |
| Popis: | In this work, the effects of various pretreatments’ parameters on kenaf core fibre were analyzed statistically and optimized using Response Surface Methodology based on the total glucose yield. The chemical compositions of the pretreated fibres were examined to discuss the effect of pretreatment on the fibre hydrolysability comprehensively. The results showed that estimation model for each pretreatment of kenaf core fibre were polynomial equations. The optimum conditions for water, acid and alkali pretreatments were 170 °C for 45 min, 120 °C for 90 min in 2.0% H2SO4 solution and 140 °C for 60 min in 3.0% NaOH solution, respectively. Among the three pretreatments, water pretreatment achieved the highest total glucose yield (25.5%), followed by acid (20.0%) and alkali (18.2%) pretreatments. Based on chemical compositions analysis, both water and acid pretreatments were capable of eliminating almost 100% of hemicellulose with negligible removal of lignin while the alkali pretreatment removed both the lignin and hemicellulose more than 60%. This result revealed that the removal of hemicellulose showed greater influential in enhancing the enzymatic accessibility and hence, hydrolysability of kenaf core fibre. |
| Databáze: | OpenAIRE |
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