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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.)

Design and optimization of hydrogen production from hydrothermally pretreated sugarcane bagasse using response surface methodology

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Soares, Lais Americo ; Braga, Juliana Kawanishi ; Motteran, Fabricio ; Sakamoto, Isabel Kimiko ; Silva, Edson Luiz ; Amancio Varesche, Maria Bernadete
Total Authors: 6
Document type: Journal article
Source: WATER SCIENCE AND TECHNOLOGY; v. 76, n. 1, p. 95-105, JUL 2017.
Web of Science Citations: 6

Hydrogen production from hydrothermally pretreated (200 degrees C for 10 min at 16 bar) sugarcane bagasse was analyzed using response surface methodology. The yeast extract concentration and the temperature had a significant influence for hydrogen production (p-value 0.027 and 0.009, respectively). Maximum hydrogen production (17.7 mmol/L) was observed with 3 g/L yeast extract at 60 degrees C (C10). In this conditions were produced acetic acid (50.44 mg/L), butyric acid (209.71 mg/L), ethanol (38.4 mg/L), and methane (6.27 mmol/L). Lower hydrogen productions (3.5 mmol/L and 3.9 mmol/L) were observed under the conditions C7 (2 g/L of yeast extract, 35.8 degrees C) and C9 (1 g/L of yeast extract, 40 degrees C), respectively. The low yeast extract concentration and low temperature caused a negative effect on the hydrogen production. By means of denaturing gradient gel electrophoresis 20% of similarity was observed between the archaeal population of mesophilic (35 and 40 degrees C) and thermophilic (50, 60 and 64 degrees C) reactors. Likewise, similarity of 22% was noted between the bacterial population for the reactors with the lowest hydrogen production (3.5 mmol/L), at 35.8 degrees C and with the highest hydrogen production (17.7 mmol/L) at 60 degrees C demonstrating that microbial population modification was a function of incubation temperature variation. (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