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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Adsorption of inhibitors using a CO2-activated sugarcane bagasse fly ash for improving enzymatic hydrolysis and alcoholic fermentation in biorefineries

Texto completo
Autor(es):
Freitas, Juliana V. [1, 2] ; Ruotolo, Luis Augusto M. [1] ; Farinas, Cristiane S. [1, 2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Grad Program Chem Engn, BR-13565905 Sao Carlos, SP - Brazil
[2] Embrapa Instrumentat, Rua XV Novembro 1452, BR-13561206 Sao Carlos, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: FUEL; v. 251, p. 1-9, SEP 1 2019.
Citações Web of Science: 1
Resumo

Many compounds released during the pretreatment of lignocellulosic biomass inhibit enzymes and yeasts, leading to a negative impact on the overall efficiency of biorefineries. Here, we propose the removal of phenolic compound and furaldehyde inhibitors by adsorption using CO2-activated sugarcane bagasse fly ash in order to improve both the enzymatic hydrolysis of cellulose and the alcoholic fermentation processes. The activation of fly ash resulted in a substantial enhancement of the specific surface area and pore volume of the adsorbent, improving the adsorption capacity for phenolics by 4.5-fold. The treatment of an inhibitor cocktail with 2% (w/v) activated fly ash resulted in removal of 97% of the phenolic compounds. The enzymatic hydrolysis of microcrystalline cellulose in the presence of the treated inhibitor cocktail resulted in glucose concentration values equivalent to that obtained for the control without the inhibitors. Moreover, the alcoholic fermentation performed using the fly ash-detoxified hydrolysate resulted in a remarkable 5.5-fold increase of the fermentation efficiency. These findings demonstrated that the CO2 activation of the fly ash resulted in an efficient adsorbent for the removal of inhibitors from both the enzymatic hydrolysis and the alcoholic fermentation processes, and could be used to improve the overall efficiency of future biorefineries. (AU)

Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
Beneficiário:Roberto de Campos Giordano
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Temático
Processo FAPESP: 14/19000-3 - Simplificação do processo de conversão de biomassa a etanol por meio da integração da produção de enzimas in-house
Beneficiário:Cristiane Sanchez Farinas
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular