Sugarcane vinasse as substrate for fermentative hydrogen production: The effects of temperature and substrate concentration

Autor(es)

Lazaro, Carolina Zampol ^{[1, 2]} ; Perna, Veronica ^{[3, 4]} ; Etchebehere, Claudia ^{[3, 4]} ; Varesche, Maria Bernadete A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Hidraul & Saneamento, Lab Proc Biol, Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Lab Controle Ambiental 2, BR-13560 Sao Carlos, SP - Brazil

^[3] Univ Republica, Fac Quim, Lab Ecol Microbiana, Inst Invest Biol Clemente Estable, Montevideo - Uruguay

^[4] Univ Republica, Fac Ciencias, Montevideo - Uruguay

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 39, n. 12, p. 6407-6418, APR 15 2014.
• Citações Web of Science: 32

Resumo

The present study aimed to evaluate the hydrogen production of a microbial consortium using different concentrations of sugarcane vinasse (2-12 g COD L-1) at 37 degrees C and 55 degrees C. In mesophilic tests, the increase in vinasse concentration did not significantly impact the hydrogen yield (HY) (from 1.72 to 2.23 mmol H-2 g(-1) CODinfluent) but had a positive effect on the hydrogen production potential (P) and hydrogen production rate (R-m). On the other hand, the increase in the substrate concentration caused a drop in HY from 2.31 to 0.44 mmol H-2 g(-1) CODinfluent in the tests performed at 55 degrees C with vinasse concentrations from 2 to 12 g COD L-1. The mesophilic community was composed of different species within the Clostridium genus, and the thermophilic community was dominated by organisms affiliated with the Thermoanaerobacter genus. Not all isolates affiliated with the Clostridium genus contributed to a high HY, as the homoacetogenic pathway can occur. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 09/00135-8 - Avaliação da produção de hidrogênio e caracterização microbiana de reatores anaeróbios de batelada alimentados com vinhaça
• Beneficiário: Carolina Zampol Lazaro
• Modalidade de apoio: Bolsas no Brasil - Doutorado