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Chemical pretreatment of Arundo donax L. for second-generation ethanol production
Silva Lemões, Juliana; Lemons e Silva, Claudia Fernanda; Farias Avila, Sabrina Peres; Scherrer Montero, Cândida Raquel; Anjos e Silva, Sérgio Delmar dos; Samios, Dimitrios; Ruaro Peralba, Maria do Carmo.
Afiliação
  • Silva Lemões, Juliana; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Lemons e Silva, Claudia Fernanda; Universidade Federal de Pelotas. Centro de Engenharia. Pelotas. BR
  • Farias Avila, Sabrina Peres; Universidade Federal do Rio Grande. Escola de Química e Alimentos. Rio Grande. BR
  • Scherrer Montero, Cândida Raquel; Embrapa Clima Temperado. Pelotas. BR
  • Anjos e Silva, Sérgio Delmar dos; Embrapa Clima Temperado. BR
  • Samios, Dimitrios; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
  • Ruaro Peralba, Maria do Carmo; Universidade Federal do Rio Grande do Sul. Porto Alegre. BR
Electron. j. biotechnol ; Electron. j. biotechnol;31: 67-54, Jan. 2018. ilus, tab, graf
Article em En | LILACS | ID: biblio-1022118
Biblioteca responsável: CL1.1
ABSTRACT

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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Assunto principal: Etanol / Poaceae Idioma: En Revista: Electron. j. biotechnol Assunto da revista: BIOTECNOLOGIA Ano de publicação: 2018 Tipo de documento: Article / Project document País de afiliação: Brasil País de publicação: Chile

Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Assunto principal: Etanol / Poaceae Idioma: En Revista: Electron. j. biotechnol Assunto da revista: BIOTECNOLOGIA Ano de publicação: 2018 Tipo de documento: Article / Project document País de afiliação: Brasil País de publicação: Chile