Green extractions to obtain value-added elephant grass co-products in an ethanol biorefinery

Autor(es)

Scopel, Eupidio ^[1] ; dos Santos, Luana Cristina ^[2] ; Bofinger, Matheus Rodrigues ^[1] ; Martinez, Julian ^[2] ; Rezende, Camila Alves ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Chem, Phys Chem Dept, UNICAMP, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Sch Food Engn, Food Engn Dept, UNICAMP, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CLEANER PRODUCTION; v. 274, NOV 20 2020.
• Citações Web of Science: 2

Resumo

The replacement of fossil fuels with renewable energy sources depends on the adoption of greener technologies and integrated processes within a biorefinery. In this study, organic molecules with high added value and fermentable sugars were obtained by combined extractions and enzymatic hydrolysis from elephant grass leaves and stems. Fatty acids, sterols, alcohols and phenolics were obtained in different concentrations using green extractions with supercritical carbon dioxide and pressurized liq-uids (PLE). The extract composition was mainly related to the solvent polarity and the best yield was achieved using water and ethanol as solvents in PLE (7.5% and 7.7% for leaves and stems, respectively). The extractions alone, without any other treatment, were able to increase the enzymatic digestibility of leaves by 50% due to the increase in the substrate wettability. The extractions also did not interfere with the biomass morphology, which allows the posterior use of the substrate for other applications. The results presented herewith showed that adopting extractions as the first step in an ethanol biorefinery is a promising way to achieve the biomass valorization and full use, together with more sustainable processes to obtain chemicals for the food, cosmetic and pharmaceutical industries. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/13602-7 - Estudo sobre estratégias para o aproveitamento integral da biomassa lignocelulósica
• Beneficiário: Camila Alves de Rezende
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 17/23670-2 - Biorrefinaria para aproveitamento de subprodutos do processamento de maracujá com tecnologias de alta pressão
• Beneficiário: Julian Martínez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/11245-5 - Fracionamento de extratos de subprodutos industriais de maracujá-azedo (Passiflora edulis) por redução de pressão utilizando CO2 supercrítico
• Beneficiário: Luana Cristina dos Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/23769-1 - Obtenção e aplicações de nanoestruturas provenientes de biomassa vegetal
• Beneficiário: Camila Alves de Rezende
• Modalidade de apoio: Auxílio à Pesquisa - Regular