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

Bacterial and archaeal community structure involved in biofuels production using hydrothermal- and enzymatic-pretreated sugarcane bagasse for an improvement in hydrogen and methane production

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Author(s):
Braga, Juliana K. [1] ; Motteran, Fabricio [1] ; Sakamoto, Isabel K. [1] ; Varesche, Maria Bernadete A. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Sch Engn Sao Carlos, Dept Hydraul & Sanitat, Av Trabalhador Saocarlense 400, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SUSTAINABLE ENERGY & FUELS; v. 2, n. 12, p. 2644-2660, DEC 1 2018.
Web of Science Citations: 1
Abstract

Sugarcane bagasse (SCB) was used as a lignocellulosic substrate, combining the co-production of H-2 (Stage I) and CH4 (Stage II) by a dark fermentation process in batch reactors. Hydrothermally- and enzymatic (Aspergillus niger)-pretreated SCB were applied as substrate sources. Two fermentative inocula (In1 and In2) were used in Stage I and a methanogenic inoculum in Stage II (In3), comprising in total three experimental series in relation to Stage I: A (In1), B (In1 plus In2), and C (In2). The final metabolites (solid, liquid, and gaseous fractions) from Stage I were used for CH4 production (Stage II). The SCB pretreatment employed was favorable for biogas and organic acids production. Higher H-2 and CH4 yields were obtained in C (4.3 and 6.3 mmol g(-1) SCB, respectively). For all conditions, the H-2 production occurred primarily via an acetic acid route. The predominance of cellulolytic enzyme producers (Enterococcus and Clostridium) may have favored the H-2 and subsequent CH4 production; this last was produced mainly from members of the Methanoregulaceae and Methanosaetaceae families. Furthermore, homoacetogenic bacteria (Acetobacterium, Clostridium, Eubacterium, Holophaga) were also identified in both stages. The synergistic action of these microbial groups promoted the hydrolysis of SCB as well as hydrogen and methane production. (AU)

FAPESP's process: 09/15984-0 - Bioenergy production from wastewaters and environmental fitting of liquid and solid wastes generated
Grantee:Marcelo Zaiat
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/20196-7 - Hydrolysis of sugar cane bagasse for the hydrogen and biogas production with suspended and immobilized in nanocoatings biomass
Grantee:Juliana Kawanishi Braga
Support Opportunities: Scholarships in Brazil - Post-Doctoral