期刊
RENEWABLE ENERGY
卷 191, 期 -, 页码 428-438出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2022.04.057
关键词
Biorefinery; Biomass pretreatment; Enzymatic hydrolysis; Anaerobic digestion; Biogas
资金
- Brazilian Coordination for the Improvement of Higher Education Personnel (CAPES) [001]
- Minas Gerais Research Foundation (FAPEMIG) [APQ-01360-14, PPM-00645-17]
- Brazilian National Council for Scientific and Technological Development (CNPq)
- Brazilian Study and Project Funding Agency (FINEP)
This study evaluated the pretreatment of sugarcane bagasse with dilute citric acid solution for biogas production. The pretreated black liquor and residual solid fraction were used as substrates for biogas production. The highest concentration of total reducing sugars obtained after saccharifications was in the range of 10.7-184.8 g L-1, with sugar yields ranging from 3.5-88.8%. Biogas production from the black liquor and residual solid fraction showed promising results, indicating the feasibility of using dilute citric acid pretreatment in biorefineries.
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 (R) 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 g(COD)(-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. (C) 2022 Elsevier Ltd. All rights reserved.
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