Effects of External Resistance on Microbial Fuel Cell’s Performance

Campo, Araceli González del; Cañizares, Pablo; Lobato, Justo; Rodrigo, Manuel A.; Fernández-Morales, Francisco Jesús

doi:10.1007/698_2014_290

Cited by 24 publications

(6 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and by the construction of the power curves (P = V•I) (employing the evaluation of polarization curve V vs. I) which allow for the determination of not only the maximum power (P máx ) generated by the cell, but also the internal resistance which determines the relationship between the maximum power generated by the cell and the square of the intensity of the current (Equation ( 2)) [33].…”

Section: Resultsmentioning

confidence: 99%

Enhancement of Electricity Production in Microbial Fuel Cells Using a Biosurfactant-Producing Co-Culture

Montoya-Vallejo,

Gil Posada,

Quintero-Díaz

2023

Molecules

View full text Add to dashboard Cite

Microbial fuel cells are bio-electrochemical devices that enable the conversion of chemical energy into bioelectricity. In this manuscript, the use of biosurfactants (Tween 80 and surfactin) and the effect of coculturing E. coli and L. plantarum were used to investigate the generation of bioelectricity coming from an H-type microbial fuel cell. In this setup, E. coli acts as an electron donor while L. plantarum acts as an in situ biosurfactant producer. It was observed that the use of exogenous surfactants enhanced electricity production compared to conventional E. coli cultures. The utilization of Tween 80 and surfactin increased the power generation from 204 µW m−2 to 506 µW m−2 and 577 µW m−2, respectively. Furthermore, co-culturing E. coli and L. plantarum also resulted in a higher power output compared to pure cultures (132.8% more when compared to using E. coli alone and 68.1% more when compared to using L. plantarum alone). Due to the presence of surfactants, the internal resistance of the cell was reduced. The experimental evidence collected here clearly indicates that the production of endogenous surfactants, as well as the addition of exogenous surfactants, will enhance MFC electricity production.

show abstract

Section: Resultsmentioning

confidence: 99%

Enhancement of Electricity Production in Microbial Fuel Cells Using a Biosurfactant-Producing Co-Culture

Montoya-Vallejo,

Gil Posada,

Quintero-Díaz

2023

Molecules

View full text Add to dashboard Cite

show abstract

“…The construction of the power curves (P = V I) (from the polarization curve V vs. I) allowed for the determination of the maximum power generated by the cell (Pmax), and for the determination of the internal resistance which determines a relationship between the maximum power generated by the cell and the square of the intensity of the current (Equation ( 2)) [33].…”

Section: Reactor Design and Operationmentioning

confidence: 99%

Effect of Glucose and Methylene Blue in Microbial Fuel Cells Using E. coli

Montoya-Vallejo,

Gil Posada,

Quintero-Díaz

2023

Energies

View full text Add to dashboard Cite

Microbial fuel cells could be used as an alternative for wastewater treatment and electricity generation. Escherichia coli is a representative bacterium that has been widely studied as a model in laboratory assays despite its limited ability to transfer electrons. Although previous studies have employed glucose and methylene blue in electricity production using E. coli, there remains a lack of understanding on how current generation would impact the production of metabolites and what the most appropriate conditions for current production might be. To shed light on those issues, this manuscript used a 32 factorial design to evaluate the effect of the concentration of organic matter (glucose) and the concentration of the mediator methylene blue (MB) using E. coli DH5α as an anodic microorganism. It was found that as the concentration of glucose was increased, the production of electricity increased and at the same time, its degradation percentage decreased. Similarly, a 17-fold increase in current production was observed with an elevation in methylene blue concentration from 0 to 0.3 mM, though inhibition became apparent at higher concentrations. The maximum power generated by the cell was 204.5 µW m−2, achieving a current density of 1.434 mA m−2 at concentrations of 5 g L−1 of glucose and 0.3 mM of MB. Reductions in the production of ethanol, lactate, and acetate were observed due to the deviation of electrons to the anode.

show abstract

“…Some strategies to maximize the benefits of DC-MFCs focus on user-controllable parameters such as electrode materials, substrate, catholyte, and device scale [ 4 , 5 , 6 ]. The materials used as electrodes have a direct effect on the performance of MFCs.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Graphite, Graphene, and Hydrophilic-Treated Graphene Electrodes to Improve Power Generation and Wastewater Treatment in Microbial Fuel Cells

Borja-Maldonado

Zavala

2023

Bioengineering

View full text Add to dashboard Cite

In this study, graphite, graphene, and hydrophilic-treated graphene electrodes were evaluated in a dual-chamber microbial fuel cell (DC-MFC). Free-oxygen conditions were promoted in anodic and cathodic chambers. Hydrochloric acid at 0.1 M and pH 1.1 was used as a catholyte, in addition to deionized water in the cathodic chamber. Domestic wastewater was used as a substrate, and a DuPontTM Nafion 117 membrane was used as a proton exchange membrane. The maximum power density of 32.07 mW·m−2 was obtained using hydrophilic-treated graphene electrodes and hydrochloric acid as catholyte. This power density was 1.4-fold and 32-fold greater than that of graphene (22.15 mW·m−2) and graphite (1.02 mW·m−2), respectively, under the same operational conditions. In addition, the maximum organic matter removal efficiencies of 69.8% and 75.5% were obtained using hydrophilic-treated graphene electrodes, for hydrochloric acid catholyte and deionized water, respectively. Therefore, the results suggest that the use of hydrophilic-treated graphene functioning as electrodes in DC-MFCs, and hydrochloric acid as a catholyte, favored power density when domestic wastewater is degraded. This opens up new possibilities for improving DC-MFC performance through the selection of suitable new electrode materials and catholytes.

show abstract

Effects of External Resistance on Microbial Fuel Cell’s Performance

Cited by 24 publications

References 70 publications

Enhancement of Electricity Production in Microbial Fuel Cells Using a Biosurfactant-Producing Co-Culture

Enhancement of Electricity Production in Microbial Fuel Cells Using a Biosurfactant-Producing Co-Culture

Effect of Glucose and Methylene Blue in Microbial Fuel Cells Using E. coli

Assessment of Graphite, Graphene, and Hydrophilic-Treated Graphene Electrodes to Improve Power Generation and Wastewater Treatment in Microbial Fuel Cells

Contact Info

Product

Resources

About