Effect of external resistance on bacterial diversity and metabolism in cellulose-fed microbial fuel cells

Rismani-Yazdi, Hamid; Christy, Ann D.; Carver, Sarah M.; Yu, Zhongtang; Dehority, Burk A.; Tuovinen, Olli H.

doi:10.1016/j.biortech.2010.05.012

Cited by 172 publications

(66 citation statements)

References 24 publications

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“…Similar trends were observed for other days as shown in Figure 3. This is in agreement with previous studies [16][17][18][19][20].…”

Section: Resultssupporting

confidence: 83%

“…In another study, Ghangrekar and Shinde [15] observed that cell voltage increased with an increase in external resistance from 0 to 4,000 Ω; the maximum voltage of 358 mV was observed at an external resistance of 4,000 Ω. Later on, RismaniYazdi et al [16] obtained similar cathode potentials at different external resistances. However, anode potential varied under different external resistance employed.…”

Section: Resultsmentioning

confidence: 91%

See 1 more Smart Citation

Microbial Fuel Cells: Influence of External Resistors on Power, Current and Power Density

Jm¹,

Dn²,

Jm³

et al. 2017

J Thermodyn Catal

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“…Similar trends were observed for other days as shown in Figure 3. This is in agreement with previous studies [16][17][18][19][20].…”

Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 91%

Microbial Fuel Cells: Influence of External Resistors on Power, Current and Power Density

Jm¹,

Dn²,

Jm³

et al. 2017

J Thermodyn Catal

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“…However, this study did not provide electrochemical characterization to demonstrate whether the system was anode limited, nor did it address whether changes in R ext influenced electron losses to competing metabolisms. Another recent study of cellulose-fed microbial fuel cells (MFCs) showed that R ext affected power densities, with the highest maximum power density observed for reactors with the lowest R ext (46). While this study showed screening-level differences in 16S rRNA genes from anode biofilm and planktonic communities, the effect of R ext on specific microbial populations was not determined.…”

contrasting

confidence: 57%

Influence of External Resistance on Electrogenesis, Methanogenesis, and Anode Prokaryotic Communities in Microbial Fuel Cells

Kim

Regan

2011

Appl Environ Microbiol

223

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The external resistance (R ext ) of microbial fuel cells (MFCs) regulates both the anode availability as an electron acceptor and the electron flux through the circuit. We evaluated the effects of R ext on MFCs using acetate or glucose. The average current densities (I) ranged from 40.5 mA/m 2 (9,800 ⍀) to 284.5 mA/m 2 (150 ⍀) for acetate-fed MFCs (acetate-fed reactors [ARs]), with a corresponding anode potential (E an ) range of ؊188 to ؊4 mV (versus a standard hydrogen electrode [SHE]). For glucose-fed MFCs (glucose-fed reactors [GRs]), I ranged from 40.0 mA/m 2 (9,800 ⍀) to 273.0 mA/m 2 (150 ⍀), with a corresponding E an range of ؊189 to ؊7 mV. ARs produced higher Coulombic efficiencies and energy efficiencies than GRs over all tested R ext levels because of electron and potential losses from glucose fermentation. Biogas production accounted for 14 to 18% of electron flux in GRs but only 0 to 6% of that in ARs. GRs produced similar levels of methane, regardless of the R ext . However, total methane production in ARs increased as R ext increased, suggesting that E an might influence the competition for substrates between exoelectrogens and methanogens in ARs. An increase of R ext to 9,800 ⍀ significantly changed the anode bacterial communities for both ARs and GRs, while operating at 970 ⍀ and 150 ⍀ had little effect. Deltaproteobacteria and Bacteroidetes were the major groups found in anode communities in ARs and GRs. Betaproteobacteria and Gammaproteobacteria were found only in ARs. Bacilli were abundant only in GRs. The anode-methanogenic communities were dominated by Methanosaetaceae, with significantly lower numbers of Methanomicrobiales. These results show that R ext affects not only the E an and current generation but also the anode biofilm community and methanogenesis.The bioanode, a crucial component in bioelectrochemical systems (BESs), is composed of an anode biofilm and a conductive electrode. The main catalytic components of interest in anode biofilms are exoelectrogens, microorganisms that are capable of exocellular electron transfer (31). In mixed-culture systems, exoelectrogens compete for electron donors with other functional groups such as fermenters, acetogens, and methanogens. The complexity of anode biofilms makes it hard to elucidate electrochemical mechanisms at the bioanode, but a precise understanding of exoelectrogenesis and competition in anode biofilms will aid in improving the performance of BESs. Several reviews provide insightful summaries and perspectives regarding bioanodes (31,34,40,43,51).The anode potential (E an ) is defined as the potential difference between the anode and the surrounding electrolyte (14). E an also refers to the electromotive force that drives electrons to flow into an anode, and it is regarded as a measure of electron affinity (14). E an is affected by intrinsic factors such as electrode material, electrolyte composition, electrochemical reactions, and catalysts (anode biofilm in BESs) (14). E an also can be controlled extrinsically using a potentiostat ...

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“…Se puede obtener a partir del análisis de las curvas de polarización que se derivan de las mediciones de voltaje en la resistencia externa (Hoyos et al, 2007;Rismani-Yazdy et al, 2011), o por la técnica de espectroscopia de impedancias (Hou et al, 2012;FuentesAlbarrán et al, 2012), que se fundamenta en la aplicación de una pequeña señal de voltaje a la celda electroquímica y posterior medición de la corriente a través de ella (Ramírez et al, 2009). …”

Section: Desempeño Eléctrico De Las Ccmsunclassified

Celdas de Combustible Microbianas (CCMs): Un Reto para la Remoción de Materia Orgánica y la Generación de Energía Eléctrica

2013

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ResumenSe presentan y discuten los aspectos más importantes que inciden en el desempeño de una celda de combustible microbiana, tales como su arquitectura, la función microbiana y el tipo de sustratos. En la última década estos sistemas bioelectroquímicos han atraído el interés de diversos investigadores, no sólo por la tendencia mundial en la producción de energía sostenible, sino también por su operación simultánea para degradar materia orgánica y biorremediación. Estas aplicaciones dependen esencialmente del metabolismo microbiano sobre el cual el conocimiento aún es limitado, requiriéndose una mejor comprensión de la compleja ecología microbiana. En países en desarrollo es importante estudiar otras fuentes de microorganismos y sustratos con variada composición química que puedan ser potenciales combustibles en celdas de diferente configuración. Investigar más sobre estos aspectos será esencial para optimizar y potenciar estos procesos. Palabras clave: celda de combustible microbiana, materia orgánica, biodegradación, biorremediación Microbial Fuel Cells (MFCs): A Challenge for the Removal of Organic Matter and Electricity Generation AbstractThe most important issues that affect the performance of a microbial fuel cell, such as its architecture, microbial function and the type of substrates are presented and discussed. In the last decade these bioelectrochemical systems have attracted the interest of many researchers, not only because of the global trend towards sustainable energy production, but also due to their simultaneous operation to degrade organic matter and bioremediation. These applications depend essentially on microbial metabolism whose knowledge is still limited, being necessary a better understanding of the complex microbial ecology. In developing countries it is important to investigate others sources of microorganisms and substrates with varied chemical composition which might be potential fuels in cells of different configuration. More intense research of these aspects will be essential to optimize and improve these processes.

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Effect of external resistance on bacterial diversity and metabolism in cellulose-fed microbial fuel cells

Cited by 172 publications

References 24 publications

Microbial Fuel Cells: Influence of External Resistors on Power, Current and Power Density

Microbial Fuel Cells: Influence of External Resistors on Power, Current and Power Density

Influence of External Resistance on Electrogenesis, Methanogenesis, and Anode Prokaryotic Communities in Microbial Fuel Cells

Celdas de Combustible Microbianas (CCMs): Un Reto para la Remoción de Materia Orgánica y la Generación de Energía Eléctrica

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