Enhancing the biorefinery of chestnut burrs. Part I. Study of the pretreatment with choline chloride urea diluted deep eutectic solvent

Autor(es)

Costa-Trigo, Ivan ; Paz, Alicia ; Moran-Aguilar, Maria Guadalupe ; Guerra, Nelson Perez ; Oliveira, Ricardo Pinheiro de Souza ; Dominguez, Jose Manuel

• Tipo de documento: Artigo Científico
• Fonte: BIOMASS & BIOENERGY; v. 173, p. 9-pg., 2023-06-01.

Resumo

Chestnut burrs (CB) are agro-industrial wastes produced in large amounts during chestnut processing. Despite their high value composition, this type of biomass has been scarcely studied, becoming an important material to be valorized. In this work, a green technology based on the use of diluted choline chloride urea (ChCl:U) deep eutectic solvent (DES) was postulated to deconstruct the lignocellulosic structure. The pretreatment was evaluated using untreated CB and CB previously processed (washed CB or the solid residue obtained after prehydrolysis). Following a biorefinery concept, the samples obtained in this work will be further enzymatically hydrolyzed in Part II to reach fermentable sugars-containing solutions. Several operational parameters such as time (4, 8 and 16 h), temperature (60, 80, 100 and 120 degrees C), and liquid-solid ratio (LSR) (10:1, 15:1 and 20:1) were studied to improve CB deconstruction. Physicochemical transformations were investigated by ATR-FTIR and SEM analysis. The best delignification rate (similar to 40%) was achieved applying the DES pretreatment in untreated CB at 100 degrees C for 16 h and 20:1 (w/w) LSR, being corroborated by physicochemical changes observed by FTIR and SEM. (AU)

• Processo FAPESP: 18/25511-1 - Bioprospecção de bactérias probióticas bacteriocinogênicas: da otimização do cultivo à aplicação em sistemas de produção animal
• Beneficiário: Ricardo Pinheiro de Souza Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 21/15138-4 - Biorrefinaria de resíduos de cervejaria para obtenção de substâncias biologicamente ativas para a prevenção e tratamento da SARS-CoV-2 e para o seu emprego como conservantes naturais de alimentos
• Beneficiário: Ricardo Pinheiro de Souza Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional