Effect of Acid Sulphite Pretreatment on Enzymatic Hydrolysis of Eucalypt, Broom, and Pine
| Autor: | Tânia Gomes, Rogério Simões, Vera L. D. Costa |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
biology Formic acid 020209 energy General Chemical Engineering Sulfuric acid 02 engineering and technology General Chemistry biology.organism_classification 01 natural sciences Hydrolysate Hydrolysis chemistry.chemical_compound Biochemistry chemistry Sodium bisulfite 010608 biotechnology Eucalyptus globulus Enzymatic hydrolysis 0202 electrical engineering electronic engineering information engineering General Materials Science Food science Sugar |
| Zdroj: | Journal of Wood Chemistry and Technology. 36:63-75 |
| ISSN: | 1532-2319 0277-3813 |
| Popis: | Wood chips of Eucalyptus globulus and Pinus pinaster and Cytisus striatus branches were subjected to acid sulphite pretreatment with different charges of sodium bisulphite (5–15%) and sulphuric acid (0–5%). Sugars, organic acids, and furans released in the pretreatment and enzymatic hydrolysates were analyzed by HPLC. The carbohydrates released in the pretreatment stage ranged between 2.5% and 18.7% (on wood weight) and are strongly species-dependent. The furans and formic acid represented less than 0.06% and 0.9% on wood weight, respectively, even under harsh reaction conditions. The enzymatic hydrolysis of the solid residues resulted in polysaccharide conversions in the range of 13% to 90%, depending on the pretreatment conditions and wood species. Eucalypt performs much better than the other species in both acid sulphite and enzymatic hydrolysis. The drying process before the enzymatic treatment has a markedly negative effect on the rate and extent of sugar release. |
| Databáze: | OpenAIRE |
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