Chemical pretreatment of Arundo donax L. for second-generation ethanol production
| Autor: | Claudia Fernanda Lemons e Silva, Maria do Carmo Ruaro Peralba, Sergio Delmar dos Anjos e Silva, Juliana Silva Lemões, Dimitrios Samios, C. R. S. Montero, Sabrina Peres Farias Avila |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
020209 energy
lcsh:Biotechnology Lignocellulosic biomass 02 engineering and technology 010501 environmental sciences Xylose Arundo biomass Furfural 01 natural sciences Applied Microbiology and Biotechnology Hydrolysate chemistry.chemical_compound Acetic acid Hydrolysis Acid pretreatment Biofuel Response surface methodology Enzymatic hydrolysis lcsh:TP248.13-248.65 0202 electrical engineering electronic engineering information engineering lcsh:QH301-705.5 Alkaline pretreatment 0105 earth and related environmental sciences Chromatography biology Giant reed Chemistry Arundo biology.organism_classification Raw material Glucose Biochemistry lcsh:Biology (General) Lignocellulose Biotechnology |
| Zdroj: | Electronic Journal of Biotechnology, Vol 31, Iss C, Pp 67-74 (2018) |
| ISSN: | 0717-3458 |
| Popis: | Background: Pretreatment of lignocellulosic biomass is essential for using it as a raw material for chemical and biofuel production. This study evaluates the effects of variables in the chemical pretreatment of the Arundo biomass on the glucose and xylose concentrations in the final enzymatic hydrolysate. Three pretreatments were tested: acid pretreatment, acid pretreatment followed by alkaline pretreatment, and alkaline pretreatment. Results: The amounts of glucose and xylose released by the enzymatic hydrolysis of the Arundo biomass obtained from acid pretreatment ranged from 6.2 to 19.1 g/L and 1.8 to 3.1 g/L, respectively. The addition of alkaline pretreatment led to a higher yield from the enzymatic hydrolysis, with the average glucose concentration 3.5 times that obtained after biomass hydrolysis with an acid pretreatment exclusively. The use of an alkaline pretreatment alone resulted in glucose and xylose concentrations similar to those obtained in the two-step pretreatment: acid pretreatment followed by alkaline pretreatment. There was no significant difference in 5-hydroxymethylfurfural, furfural, or acetic acid concentrations among the pretreatments. Conclusion: Alkaline pretreatment was essential for obtaining high concentrations of glucose and xylose. The application of an alkaline pretreatment alone resulted in high glucose and xylose concentrations. This result is very significant as it allows a cost reduction by eliminating one step. |
| Databáze: | OpenAIRE |
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