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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Isolation and physicochemical characterization of different lignin streams generated during the second-generation ethanol production process

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Castro, Rafael C. A. [1] ; Ferreira, Isabela S. [1] ; Roberto, Ines C. [1] ; Mussatto, Solange I. [2]
Total Authors: 4
[1] Univ Sao Paulo, Dept Biotecnol, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil
[2] Tech Univ Denmark, Novo Nordisk Fdn Ctr Biosustainabil, Bldg 220, DK-2800 Lyngby - Denmark
Total Affiliations: 2
Document type: Journal article
Source: International Journal of Biological Macromolecules; v. 129, p. 497-510, MAY 15 2019.
Web of Science Citations: 3

Four different lignin samples were isolated during the processing of rice straw for ethanol production: one after mild alkaline pretreatment (deacetylation) of rice straw, and other three after simultaneous saccharification and fermentation (fermentation residues), under different process conditions. Then, a complete chemical characterization in terms of main components (lignin, carbohydrates, among others) and elemental composition was performed for all the samples. Additionally, the structural and morphological characteristics, calorific value, thermal stability, solubility in solvents and antioxidant potential were also determined. For comparison, a standard lignin (Kraft lignin) was also assayed. The results revealed that the process used for lignin isolation has an important influence in the final properties of the sample. In general, the fermentation residues contained non-hydrolyzed polysaccharides in their composition and lower lignin content when compared to the lignin solubilized in the alkaline liquor. Among several organic solvents and mixtures, acetone 80% (v/v) was the most efficient for lignin solubilisation. Interesting properties and characteristics were observed for all the lignin samples isolated from rice straw processing, which would allow their application in different industrial areas. Based on the properties, potential applications were suggested, which could be of value for integration in biorefineries. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/13953-6 - Ethanol production from rice straw by simultaneous saccharification and fermentation employing a non-conventional stirred reactor
Grantee:Rafael Cunha de Assis Castro
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 15/20510-9 - Techno-economic assessment of ethanol production from rice straw based on the biochemical biorefinery
Grantee:Rafael Cunha de Assis Castro
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 15/24813-6 - Assessment of a biochemical platform based on two streams model (C6 and C5) for conversion of rice straw into ethanol
Grantee:Ines Conceicao Roberto
Support Opportunities: Regular Research Grants