Experimental design and syntrophic microbial pathways for biofuel production from sugarcane bagasse under thermophilic condition

Author(s)

Soares, L. A. ^[1] ; Rabelo, C. A. B. S. ^[1] ; Delforno, T. P. ^[2] ; Silva, E. L. ^[3] ; Varesche, M. B. A. ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Hydraul & Sanitat Engn, Ave Joao Dagnone 1100, Sao Carlos, SP - Brazil

^[2] Res Ctr Chem Biol & Agr, BR-13081970 Campinas, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Chem Engn, Rodovia Washington Luis S-N, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: RENEWABLE ENERGY; v. 140, p. 852-861, SEP 2019.
• Web of Science Citations: 0

Abstract

The molecular mechanisms behind the bioconversion of sugarcane bagasse into biofuel by promising metabolic pathways were studied, suggesting that proteolytic, cellulolytic and methanogenic microorganisms such as Coprothermobacter, Clostridium, and Methanothermobacter, respectively, took an important syntrophic role in lignocellulosic-derived fuel production. The mixed acid fermentation was the main route to the acetic, formic, butyric, and propionic acid production by acid-forming bacteria. Some aspects of biotechnological application of such metabolic pathways were evaluated from a central composite design, in which the effect of incubation temperature (from 45.8 to 74.2 degrees C) and yeast extract concentration (from 0.58 to 3.42 g/L) on hydrogen production were assessed. The interaction between these factors significantly affected the hydrogen production, which reached the highest value (17.3 mmol/L) using 3.42 g/L of yeast extract at 60 degrees C, and favored a plastic and physiological diverse microbial community related to bioconversion of SCB. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 13/22346-6 - Hydrolysis of cane bagasse to hydrogen production in mesophilic and thermophilic conditions
• Grantee: Laís Américo Soares
• Support type: Scholarships in Brazil - Doctorate