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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.)

Sequential fermentative and phototrophic system for hydrogen production: An approach for Brazilian alcohol distillery wastewater

Full text
Author(s):
Lazaro, Carolina Zampol [1] ; Varesche, Maria Bernadete A. [2] ; Silva, Edson Luiz [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem Engn, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Sch Engn Sao Carlos, Dept Hydraul & Sanitat, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 40, n. 31, p. 9642-9655, AUG 17 2015.
Web of Science Citations: 10
Abstract

This study evaluated the possibility of using sugarcane vinasse for biological hydrogen production under non-sterile conditions via sequential two-stage fermentative and phototrophic processes, which simultaneously allows bioenergy production and chemical oxygen demand (COD) removal. The fermentative process was performed in an anaerobic fluidized bed reactor (AFBR) fed with a mixture of sucrose and sugarcane vinasse (5:10 g COD L-1). The phototrophic process was performed using a microbial consortium (Rhodopseudomonas related microorganisms) as inoculum and batch reactors fed with different concentrations of the AFBR effluent (10, 20, 40, 70 and 80%, v/v). The hydrogen yield (HY) (0.34 mol H-2 g(-1) CODinfluent) observed in the fermentative step was justified by the establishment of microbial community composed predominantly by Lactobacillus related microorganisms. The highest HY observed in the phototrophic stage (5.5 mmol H-2 g(-1) CODremoved) was observed for the lowest AFBR concentration. Increasing the AFBR effluent concentration as the substrate for the phototrophic reactors had a negative impact on cell growth, hydrogen production and COD removal mostly due to the occurrence of sulfate reduction. Hydrogen production was not observed in batch reactors fed with 70 and 80% of AFBR effluent; however, under those conditions, the sulfate removal rate was 86.5 and 86.9%, respectively. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (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: 12/21715-5 - Hydrogen production from sugarcane vinasse in anaerobic fluidized bed reactor under thermophilic conditions
Grantee:Edson Luiz Silva
Support Opportunities: Regular Research Grants
FAPESP's process: 12/03979-5 - Hydrogen production from sugarcane vinasse using sequential two-stage dark and photo fermentation processes
Grantee:Carolina Zampol Lazaro
Support Opportunities: Scholarships in Brazil - Post-Doctoral