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A multi-electrode continuous flow microbial fuel cell with separator electrode assembly design.
Appl Microbiol Biotechnol. 2012 Mar; 93(5):2241-8.AM

Abstract

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 m2/m3), 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/m2, 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.

Authors+Show Affiliations

Department of Civil & Environmental Engineering, Penn State University, 212 Sackett Building, University Park, PA 16802, USA.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22314518

Citation

Ahn, Yongtae, and Bruce E. Logan. "A Multi-electrode Continuous Flow Microbial Fuel Cell With Separator Electrode Assembly Design." Applied Microbiology and Biotechnology, vol. 93, no. 5, 2012, pp. 2241-8.
Ahn Y, Logan BE. A multi-electrode continuous flow microbial fuel cell with separator electrode assembly design. Appl Microbiol Biotechnol. 2012;93(5):2241-8.
Ahn, Y., & Logan, B. E. (2012). A multi-electrode continuous flow microbial fuel cell with separator electrode assembly design. Applied Microbiology and Biotechnology, 93(5), 2241-8. https://doi.org/10.1007/s00253-012-3916-4
Ahn Y, Logan BE. A Multi-electrode Continuous Flow Microbial Fuel Cell With Separator Electrode Assembly Design. Appl Microbiol Biotechnol. 2012;93(5):2241-8. PubMed PMID: 22314518.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A multi-electrode continuous flow microbial fuel cell with separator electrode assembly design. AU - Ahn,Yongtae, AU - Logan,Bruce E, PY - 2011/11/22/received PY - 2012/01/19/accepted PY - 2012/01/15/revised PY - 2012/2/9/entrez PY - 2012/2/9/pubmed PY - 2012/6/7/medline SP - 2241 EP - 8 JF - Applied microbiology and biotechnology JO - Appl Microbiol Biotechnol VL - 93 IS - 5 N2 - 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 m2/m3), 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/m2, 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. SN - 1432-0614 UR - https://www.unboundmedicine.com/medline/citation/22314518/A_multi_electrode_continuous_flow_microbial_fuel_cell_with_separator_electrode_assembly_design_ L2 - https://dx.doi.org/10.1007/s00253-012-3916-4 DB - PRIME DP - Unbound Medicine ER -
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