Microbial fuel
            <scp>cells—A</scp>
            preferred technology to prevail energy crisis

Din, Muhammad Imran; Nabi, Amna Ghulam; Hussain, Zaib; Khalid, Ruhi; Iqbal, Mahroosh; Arshad, Muhammad; Muhjahid, Adnan; Hussain, Tajamal

doi:10.1002/er.6403

Cited by 33 publications

(15 citation statements)

References 171 publications

(264 reference statements)

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“…However, it was found that the menadione redox mediator could cause a 10-fold increase in MFC performance. Nevertheless, the obtained power density value (4.93 mW m −2 ) dictated that the electron transfer rate between R. anhuiense and CF electrode was not sufficient in comparison with today’s most powerful MFC devices, where the values of their power output range from several hundred to a few Watts per square meter [ 69 ]. It was assumed that an electron acceptor—molecular oxygen—could take a significant amount of electrons, making the whole device less efficient.…”

Section: Discussionmentioning

confidence: 99%

Microbial Fuel Cell Based on Nitrogen-Fixing Rhizobium anhuiense Bacteria

et al. 2022

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In this study, the nitrogen-fixing, Gram-negative soil bacteria Rhizobium anhuiense was successfully utilized as the main biocatalyst in a bacteria-based microbial fuel cell (MFC) device. This research investigates the double-chambered, H-type R. anhuiense-based MFC that was operated in modified Norris medium (pH = 7) under ambient conditions using potassium ferricyanide as an electron acceptor in the cathodic compartment. The designed MFC exhibited an open-circuit voltage (OCV) of 635 mV and a power output of 1.07 mW m−2 with its maximum power registered at 245 mV. These values were further enhanced by re-feeding the anode bath with 25 mM glucose, which has been utilized herein as the main carbon source. This substrate addition led to better performance of the constructed MFC with a power output of 2.59 mW m−2 estimated at an operating voltage of 281 mV. The R. anhuiense-based MFC was further developed by improving the charge transfer through the bacterial cell membrane by applying 2-methyl-1,4-naphthoquinone (menadione, MD) as a soluble redox mediator. The MD-mediated MFC device showed better performance, resulting in a slightly higher OCV value of 683 mV and an almost five-fold increase in power density to 4.93 mW cm−2. The influence of different concentrations of MD on the viability of R. anhuiense bacteria was investigated by estimating the optical density at 600 nm (OD600) and comparing the obtained results with the control aliquot. The results show that lower concentrations of MD, ranging from 1 to 10 μM, can be successfully used in an anode compartment in which R. anhuiense bacteria cells remain viable and act as a main biocatalyst for MFC applications.

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Section: Discussionmentioning

confidence: 99%

Microbial Fuel Cell Based on Nitrogen-Fixing Rhizobium anhuiense Bacteria

et al. 2022

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“…To get energy from waste, different thermal technologies, such as pyrolysis, gasification and incineration, are often used; however, these technologies are also often criticized due to associated health concerns, economical imbalance, operational complications and greenhouse gas generation [3]. On the other hand, MFC is a non-thermal technology that operates at low temperatures (below 20 • C), and is referred as the safest technology to utilize various wastes and generate energy with no toxic byproducts [3,4]. Another benefit of using MFC is its efficiency towards pollutant removal from waste, with better effluent quality [5].…”

Section: Introductionmentioning

confidence: 99%

Statistical Modeling and Performance Optimization of a Two-Chamber Microbial Fuel Cell by Response Surface Methodology

et al. 2021

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Microbial fuel cell, as a promising technology for simultaneous power production and waste treatment, has received a great deal of attention in recent years; however, generation of a relatively low power density is the main limitation towards its commercial application. This study contributes toward the optimization, in terms of maximization, of the power density of a microbial fuel cell by employing response surface methodology, coupled with central composite design. For this optimization study, the interactive effect of three independent parameters, namely (i) acetate concentration in the influent of anodic chamber; (ii) fuel feed flow rate in anodic chamber; and (iii) oxygen concentration in the influent of cathodic chamber, have been analyzed for a two-chamber microbial fuel cell, and the optimum conditions have been identified. The optimum value of power density was observed at an acetate concentration, a fuel feed flow rate, and an oxygen concentration value of 2.60 mol m−3, 0.0 m3, and 1.00 mol m−3, respectively. The results show the achievement of a power density of 3.425 W m−2, which is significant considering the available literature. Additionally, a statistical model has also been developed that correlates the three independent factors to the power density. For this model, R2, adjusted R2, and predicted R2 were 0.839, 0.807, and 0.703, respectively. The fact that there is only a 3.8% error in the actual and adjusted R2 demonstrates that the proposed model is statistically significant.

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“…Microbial electrochemical technologies (METs) include microbial fuel cells (MFCs), microbial electrolysis cells (MECs), and microbial electro synthesis (MES). These technologies can be applied to energy production, value‐added chemicals production, bioremediation, biosensors, etc 1 . MET device overall performance is affected by factors that include microorganisms, electrodes, proton exchange membranes, reactor design, and operating parameters 2 .…”

Section: Introductionmentioning

confidence: 99%

Exploring the effect of attractive and repulsive magnetic field on electricity generation and microbial community in microbial fuel cells

Lay

Deng

Chang

2021

Intl J of Energy Research

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External magnetic field technology enhances microbial electrochemical reactions in biological processes. This study added Neodymium-Iron-Boron magnets to the outside of a double-chamber cubic microbial fuel cell (MFC) to explore the attractive or repulsive magnetic field effects at various intensities (0, 60, and 120 mT) on MFC performance. The results show that an extra 120 mT repulsive magnetic field can generate a peak power density of 144 mW/m 2 and a maximum current density of 1558 mA/m 2 . This value is 45 and 8 times higher, respectively, compared without adding the magnetic field. Moreover, adding 120 mT repulsive magnetic field can increase coulombic efficiency (CE) to 63.0%, which is higher than the CE of 25.9% without magnetic field addition. Taxonomy profiling classification results show that Geobacter and Pseudomonas, which can achieve e-pili and redox mediators, were the domain microorganism community. Magnetic fields enhance the electron movement efficiency through extracellular electron transfer mechanisms, including e-pili and redox mediators provided by the exoelectrogenic microorganism to enlarge the chemical oxygen demand removal efficiency and CE value as well as increase the electron transfer probability to the electrode.

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Microbial fuel cells—A preferred technology to prevail energy crisis

Cited by 33 publications

References 171 publications

Microbial Fuel Cell Based on Nitrogen-Fixing Rhizobium anhuiense Bacteria

Microbial Fuel Cell Based on Nitrogen-Fixing Rhizobium anhuiense Bacteria

Statistical Modeling and Performance Optimization of a Two-Chamber Microbial Fuel Cell by Response Surface Methodology

Exploring the effect of attractive and repulsive magnetic field on electricity generation and microbial community in microbial fuel cells

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