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Title: Pretreatment of sugarcane bagasse with dilute citric acid and enzymatic hydrolysis : use of black liquor and solid fraction for biogas production.
Authors: Gomes, Michelle Garcia
Paranhos, Aline Gomes de Oliveira
Camargos, Adonai Bruneli de
Baeta, Bruno Eduardo Lobo
Baffi, Milla Alves
Gurgel, Leandro Vinícius Alves
Pasquini, Daniel
Keywords: Biorefinery
Biomass pretreatment
Enzymatic hydrolysis
Anaerobic digestion
Issue Date: 2022
Citation: GOMES, M. G. et al. Pretreatment of sugarcane bagasse with dilute citric acid and enzymatic hydrolysis: use of black liquor and solid fraction for biogas production. Renewable Energy, v. 191, p. 428-438, maio 2022. Disponível em: <>. Acesso em: 11 out. 2022.
Abstract: This study evaluated the pretreatment of sugarcane bagasse (SCB) with dilute citric acid solution for biogas production. The black liquor (BL) from pretreatment and residual solid fraction (RSF) obtained after enzymatic hydrolysis were used as substrates for the biogas production. After saccharifications of the pretreated solid fractions performed with Cellic® CTec 3 cocktail, the highest concentration of total reducing sugars (TRS) was in the range of 10.7–184.8 g L−1 and the sugar yields were in the range of 3.5–88.8%. For BL, the contents of glucose, xylose, and arabinose were in the range of 1.9–8.9 g L−1, 4.0–24.7 g L−1, and 0.2–5.4 g L−1, respectively. Biogas production from BL and RSF resulted, respectively, in maximum values of 563.6 and 57.8 NmL gCOD−1, indicating the feasibility of using dilute citric acid pretreatment coupled to biogas production in biorefineries. Brief energy and economic assessment were carried out considering the energy balance (thermal energy generated by burning biogas - thermal energy spent in the pretreatment), as well as revenue from a possible sale of electricity generated in a combined heat and power system.
ISSN: 0960-1481
Appears in Collections:DEQUI - Artigos publicados em periódicos

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