The influential role of external electrical load in microbial fuel cells and related improvement strategies: A review

Koók, László; Nemestóthy, Nándor; Bélafi–Bakó, Katalin; Bakonyi, Péter

doi:10.1016/j.bioelechem.2021.107749

Cited by 30 publications

(13 citation statements)

References 84 publications

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“…In the high current density zone, the curve doubled back towards lower current densities as identified as the D-type power overshoot [33,34]. The D-type power overshoot can occur due to insufficient anodic biofilm acclimation, the composition of microorganisms in the biofilm, and limitations in substrate utilization [35,36]. As a result, the electron generation rate by biofilm can be limited under low external resistances [34,37].…”

Section: Discussionmentioning

confidence: 99%

Feasibility of a self‐sustaining microbial fuel cell incorporating natural processes of bacteria and microalgae towards a circular bioeconomy

Don

Babel

2023

Applied Research

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A microbial fuel cell (MFC) consisting of a bacterial anode chamber and a microalgal cathode chamber was operated under various conditions to assess its technical feasibility. Maximum achievable power density reached up to 7.13 mW m–2. The traditional MFC process of conversion of carbon sources to bioelectricity in the anodic chamber was compared with a system circulating anodic effluent to the cathode chamber. The bacteria and microalgae simultaneously carried out the carbon recycling and recovery of energy and resources synergizing the performance of MFC. Results indicated a comparable chemical oxygen demand removal efficiencies at 50% of the retention time compared to the traditional system. The dissolved oxygen concentration varied between 11.95 and 7.44 mg L–1 with Chlorella vulgaris under alternative light and dark cycles. Despite the variations in electricity output, the system showed its technical feasibility to harness energy for photosynthesis under natural sunlight conditions.

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Section: Discussionmentioning

confidence: 99%

Feasibility of a self‐sustaining microbial fuel cell incorporating natural processes of bacteria and microalgae towards a circular bioeconomy

Don

Babel

2023

Applied Research

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“…Such biofilms can sometimes be beneficial for the environment and some industries. In fact, biofilms have been utilized for microbial bioprocessing, [36,37] microbial fuel cells, [38,39] bioremediation, [40,41] biosensor design, [42,43] and biohydrogen production. [44,45] However, a tendency of bacterial accumulation on surfaces is in charge of a diverse spectrum of local/systemic diseases and industrial biofouling.…”

Section: Discussionmentioning

confidence: 99%

A 3D‐Printed Customizable Platform for Multiplex Dynamic Biofilm Studies

Dhall

Ramjee

et al. 2022

Adv Materials Technologies

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Biofilms are communities of microbes that colonize surfaces. While several biofilm experimental models exist, they often have limited replications of spatiotemporal dynamics surrounding biofilms. For a better understanding dynamic and complex biofilm development, this manuscript presents a customizable platform compatible with off‐the‐shelf well plates that can monitor microbial adhesion, growth, and associated parameters under various relevant scenarios by taking advantage of 3D printing. The system i) holds any substrate in a stable, vertical position, ii) subjects samples to flow at different angles, iii) switches between static and dynamic modes during an experiment, and iv) allows multiplexing and real‐time monitoring of biofilm parameters. Simulated fluid dynamics is employed to estimate flow patterns around discs and shear stresses at disc surfaces. A 3D printed peristaltic pump and a customized pH measurement system for real‐time tracking of spent biofilm culture media are equipped with a graphical user interface that grants control over all experimental parameters. The system is tested under static and dynamic conditions with Streptococcus mutans using different carbon sources. By monitoring the effluent pH and characterizing biochemical, microbiological, and morphological properties of cultured biofilms, distinct properties are demonstrated. This novel platform liberates designing experimental strategies for investigations of biofilms under various conditions.

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“…The influence of external resistance on cellular performance was also investigated by Rossi and Logan [77], and it was discovered that modifying the external resistance during the acclimation of MFCs can significantly affect the performance of the anode, and this impact is observed in terms of charge transfer, diffusion, and the overall resistance of the anode. In the majority of cases, a load below 1 kΩ was identified as the most appropriate choice of external resistance [78]. Therefore it was suggested that future investigations aiming to optimize system performance in terms of power production should consider experimenting within this range of load values [78].…”

Section: External Electricity or Electric Fieldmentioning

confidence: 99%

“…In the majority of cases, a load below 1 kΩ was identified as the most appropriate choice of external resistance [78]. Therefore it was suggested that future investigations aiming to optimize system performance in terms of power production should consider experimenting within this range of load values [78].…”

Section: External Electricity or Electric Fieldmentioning

confidence: 99%

Strategies for Enhancing Extracellular Electron Transfer in Environmental Biotechnology: A Review

Hazzan,

Zhao,

Xiao

2023

Applied Sciences

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Extracellular electron transfer (EET) is a biological mechanism that plays a crucial role in various bioelectrochemical systems (BESs) and has substantial implications for renewable energy production. By utilizing the metabolic capacities of exoelectrogens, BESs offer a viable and environmentally friendly approach to electricity generation and chemical production; however, the diminished effectiveness of EET remains a hindrance to their optimal application in practical contexts. This paper examines the various strategies that have the potential to be employed to enhance the efficiency of EET systems and explores the potential for the integration of BESs technology with contemporary technologies, resulting in the development of an enhanced and sustainable system. It also examines how quorum sensing, electrode modifications, electron shuttles, and mediators can aid in improving EET performance. Many technological innovations, such as additive manufacturing, the science of nanotechnology, the technique of genetic engineering, computational intelligence, and other combinations of technologies that can be used to augment the efficacy of BESs are also discussed. Our findings will help readers understand how BESs, though an evolving technology, can play an important role in addressing our environmental concerns. Technical constraints are identified, and future directions in the field of EET are suggested.

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The influential role of external electrical load in microbial fuel cells and related improvement strategies: A review

Cited by 30 publications

References 84 publications

Feasibility of a self‐sustaining microbial fuel cell incorporating natural processes of bacteria and microalgae towards a circular bioeconomy

Feasibility of a self‐sustaining microbial fuel cell incorporating natural processes of bacteria and microalgae towards a circular bioeconomy

A 3D‐Printed Customizable Platform for Multiplex Dynamic Biofilm Studies

Strategies for Enhancing Extracellular Electron Transfer in Environmental Biotechnology: A Review

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