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

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

Full text
Author(s):
Freitas, Juliana V. [1, 2] ; Ruotolo, Luis Augusto M. [1] ; Farinas, Cristiane S. [1, 2]
Total Authors: 3
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: FUEL; v. 251, p. 1-9, SEP 1 2019.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales
Grantee:Roberto de Campos Giordano
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants
FAPESP's process: 14/19000-3 - Simplification of the biomass to ethanol conversion process by integration with the production of enzymes in-house
Grantee:Cristiane Sanchez Farinas
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants