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TitleResources recovery in the dairy industry: bioelectricity production using a continuous microbial fuel cell
Author(s)Faria, Ana
Gonçalves, Liliana
Peixoto, J.
Peixoto, L.
Brito, António José Guerreiro
Martins, Gilberto
KeywordsDairy industry wastewater
Microbial fuel cell
Resources recovery
Continuous operation
Issue date2017
JournalJournal of Cleaner Production
CitationFaria, Ana; Gonçalves, Liliana; Peixoto, J. M.; Peixoto, L.; Brito, A. G.; Martins, Gilberto, Resources recovery in the dairy industry: bioelectricity production using a continuous microbial fuel cell. Journal of Cleaner Production, 140, Part 2, 971-976, 2017
Abstract(s)The increasing food demand and the exhaustion of non-renewable fuels provide new market opportunities in the agro-farming sector. Biological systems designed to add value to useless organic sub-products and to generate off-grid electricity may be one of the most interesting outcomes. Therefore, the capacity of some microorganisms to transfer electrons generated during organic carbon oxidation directly to an anode in a so-called microbial fuel cell (MFC) might be an asset in a sustainable management context. In this regard, the main goal of the present work was to evaluate the performance of a continuous MFC applied in a dairy industry. A maximum voltage of 576 mV was produced during continuous operation, corresponding to a power density of 92.2 mW·m-2 or 1.9 W·m-3. MFC was able to remove 1298±617 mg·L-1 of chemical oxygen demand (COD) at a hydraulic retention time of 8.4 h, and the maximum COD removal (63±5 %) was achieved after 20 days of continuous operation. In addition, the coulombic efficiency average was around 10.5±10% with a maximum of 24.2±1.5%. In average, the MFC was able to extract a specific energy of 8.95×102 kWh·kg-1 COD with a maximum output of 20.53×102 kWh·kg-1 COD. In conclusion, the MFC technology is a valuable option for simultaneous wastewater treatment and energy recovery and deserves to be tested and scaled-up in the dairy industry.
Description"Available online 19 April 2016"
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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