| A multi-electrode continuous flow microbial fuel cell with separator electrode assembly design. | |
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MedLine Citation:
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PMID: 22314518 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Scaling up microbial fuel cells (MFCs) requires the development of compact reactors with multiple electrodes. A scalable single chamber MFC (130 mL), with multiple graphite fiber brush anodes and a single air-cathode cathode chamber (27 m(2)/m(3)), was designed with a separator electrode assembly (SEA) to minimize electrode spacing. The maximum voltage produced in fed-batch operation was 0.65 V (1,000 Ω) with a textile separator, compared to only 0.18 V with a glass fiber separator due to short-circuiting by anode bristles through this separator with the cathode. The maximum power density was 975 mW/m(2), with an overall chemical oxygen demand (COD) removal of >90% and a maximum coulombic efficiency (CE) of 53% (50 Ω resistor). When the reactor was switched to continuous flow operation at a hydraulic retention time (HRT) of 8 h, the cell voltage was 0.21 ± 0.04 V, with a very high CE = 85%. Voltage was reduced to 0.13 ± 0.03 V at a longer HRT = 16 h due to a lower average COD concentration, and the CE (80%) decreased slightly with increased oxygen intrusion into the reactor per amount of COD removed. Total internal resistance was 33 Ω, with a solution resistance of 2 Ω. These results show that the SEA type MFC can produce stable power and a high CE, making it useful for future continuous flow treatment using actual wastewaters. |
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Authors:
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Yongtae Ahn; Bruce E Logan |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-8 |
Journal Detail:
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Title: Applied microbiology and biotechnology Volume: - ISSN: 1432-0614 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-8 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8406612 Medline TA: Appl Microbiol Biotechnol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Civil & Environmental Engineering, Penn State University, 212 Sackett Building, University Park, PA, 16802, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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