Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 42, Issue 3, Pages 1609-1621Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.09.166
Keywords
Biohydrogen; Dark fermentation (DF); Microbial electrolysis cell (MEC); Agro-industrial wastewaters and by-products; Two-stage process
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Funding
- Waste2bioHy project [FP7-MC-IEF -326974]
- BITA Project (Marie Curie IRSES) within the EU FP7 [PIR-SES-GA-2011-295170]
- French National Research Agency Projects [ANR-09-BioE-10 DefiH12, ANR-10-BTBR-02]
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The aim of this work is to evaluate biohydrogen production from agro-industrial waste-waters and by-products, by combining dark fermentation and microbial electrolysis in a two-step cascade process. Such coupling of both technologies constitutes a technological building block within a concept of environmental biorefinery where sustainable production of renewable energy is expected. Six different wastewaters and industrial by-products coming from cheese, fruit juice, paper, sugar, fruit processing and spirits factories were evaluated for the feasibility of hydrogen production in a two-step process. The overall hydrogen production when coupling dark fermentation and microbial electrolysis was increased up to 13 times when compared to fermentation alone, achieving a maximum overall hydrogen yield of 1608.6 +/- 266.2 mLH(2)/gCOD(consumed) and a maximum of 78.5 +/- 5.7% of COD removal. These results show that dark fermentation coupled with microbial electrolysis is a highly promising option to maximize the conversion of agro-industrial wastewaters and by-products into bio-hydrogen. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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