A two-stage process for hydrogen production from cheese whey: Integration of dark fermentation and biocatalyzed electrolysis
| Autor: | A. Escapa, J. Cara, R. Moreno, Begoña Carracedo, Xiomar Gómez |
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| Rok vydání: | 2015 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Chemical oxygen demand Energy Engineering and Power Technology Dark fermentation Condensed Matter Physics Pulp and paper industry Industrial waste Fuel Technology Bioelectrochemical reactor Fermentative hydrogen production Microbial electrolysis cell Effluent Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 40:168-175 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2014.10.120 |
| Popis: | This paper explores the potential of a two-stage process (fermentative + biocatalyzed electrolysis) to reduce the organic load of an industrial waste stream (cheese whey) in parallel with hydrogen production. Overall, the combined process helped to significantly reduce the chemical oxygen demand (COD) of the effluent, while producing hydrogen at a maximum yield of 94.2 L H2 kgvs−1. The low pH of the fermentative effluent fed into the bioelectrochemical reactor helped to control methanogenic and homoacetogenic activity during the second stage of the treatment. However, this acid stream needed to be diluted and amended with salts and acetate to avoid the collapse of hydrogen production rate. Therefore, practical application of a two stage process for the treatment of cheese whey would require the existence of a secondary waste stream for dilution of the acidified effluent, thus balancing its nutrients composition prior to feeding into the bioelectrochemical system. |
| Databáze: | OpenAIRE |
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