Recent advancements in microbial fuel cells: A review on its electron transfer mechanisms, microbial community, types of substrates and design for bio-electrochemical treatment

Prathiba, Sahaya Beni; Kumar, Pankaj; Vo, Dai‐Viet N.

doi:10.1016/j.chemosphere.2021.131856

Cited by 85 publications

(20 citation statements)

References 270 publications

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“…MFCs have various types of configurations, and it has been reported that single-chamber MFCs require fewer materials due to their design, that their electrical values are high, and that they have advantages in terms of cost; these cells are designed to have a single cylindrical compartment, where the anode is in contact with the substrate and the cathode is exposed to air (O 2 ) [11]. The performance of MFCs is influenced by several factors, one of them being the substrates, which are essential in these systems since they are the source of the electron donors; in this regard, the use of various substrates has been reported, including wastewater, activated sludge, decomposed lignocellulosic waste, and organic waste [12,13], the latter being a substrate found in large quantities, in addition to its compounds. Bioactive materials have great potential in various industries, as these residues are mostly the product of fruits and vegetables [6].…”

Section: Introductionmentioning

confidence: 99%

Increase in Electrical Parameters Using Sucrose in Tomato Waste

et al. 2022

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The use of organic waste as fuel for energy generation will reduce the great environmental problems currently caused by the consumption of fossil sources, giving agribusiness companies a profitable way to use their waste. In this research, tomato waste with different percentages of sucrose (0-target, 5, 10, and 20%) was used in microbial fuel cells manufactured on a laboratory scale with zinc and copper electrodes, managing to generate maximum peaks of voltage and a current of 1.08 V and 6.67 mA in the cell with 20% sucrose, in which it was observed that the optimum operating pH was 5.29, while the MFC with 0% (target) sucrose generated 0.91 V and 3.12 A on day 13 with a similar pH, even though all the cells worked in an acidic pH. Likewise, the cell with 20% sucrose had the lowest internal resistance (0.148541 ± 0.012361 KΩ) and the highest power density (224.77 mW/cm2) at a current density of 4.43 mA/cm2, while the MFC with 0% sucrose generated 160.52 mW/cm2 and 4.38 mA/cm2 of power density and current density, respectively, with an internal resistance of 0.34116 ± 0.2914 KΩ. In this sense, the FTIR (Fourier-transform infrared spectroscopy) of all the substrates used showed a high content of phenolic compounds and carboxylate acids. Finally, the MFCs were connected in a series and managed to generate a voltage of 3.43 V, enough to light an LED (green). These results give great hope to companies and society that, in the near future, this technology can be taken to a larger scale.

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Section: Introductionmentioning

confidence: 99%

Increase in Electrical Parameters Using Sucrose in Tomato Waste

et al. 2022

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“…lake and river sediment bacterial communities). The inoculation of mixed microbial consortia in MFCs is generally considered beneficial over monoculture inoculated MFCs due to factors such as the ease of operation, simplicity, lower cost, versatility in substrate requirements and the superior electrochemical performance in most instances (Fernando et al, 2013, Prathiba et al, 2022 and Yaqoob et al, 2021). Although the use of mixed cultures is beneficial in MFC performance and operation, it also brings about several challenges that ultimately results in some level of degradation in…”

Section: Introductionmentioning

confidence: 99%

The use of Statin-class compounds to suppress methanogenesis in lake sediment inoculated microbial fuel cells

Jayathilake

Dilangani

Bandara

et al. 2022

Preprint

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Methanogenesis conducted by archaea acts as a competing metabolic pathway that diverts available carbon and electrons away from exo-electrogenic metabolism in mixed culture inoculated microbial fuel cells (MFCs). Statin-class compounds are known to selectively inhibit eukaryotic and archaeal versions of HMG Co-A reductase (class-I) enzyme and the bacterial version of the same enzyme (class-II) is known to be unresponsive to statins. The results of this study demonstrated that the two model statin compounds Simvastatin and Atorvastatin were effective in suppressing methanogenesis in MFCs when applied in moderate concentrations (5 mg/L and 40 mg/L respectively) in MFC anodes. Power densities increased 2 fold compared to control (to 63 ± 1.8 mW/m2) and 2.5 fold (to 69.5 ± 1.8 mW/m2) with Simvastatin and Atorvastatin addition respectively. There was an almost complete suppression of CH4 production with the addition of both statins into MFC anodes as shown by gas composition analysis. Quantitative FISH (qFISH) analysis showed that methanogens Methanosarcina, Metanobacteria and Methanomicrobiales together with all archaea were almost completely suppressed when statins were supplemented into MFC anodes. This study demonstrated that the statins addition can be used to boost power densities in MFCs.

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“…11 Both extracellular electron transfer methods allow to determine conversion efficiency, yet depending on conversion efficiency is inadequate to determine the MFC behavior as it does not sufficiently explain the energy generation mechanism. 12,13 Therefore, additional parameters should be considered for effective performance analysis, including the metabolic capacities of the chosen microorganism, substrate type, electron transfer mechanism, effectiveness of the proton exchange across the membrane, internal resistance, MFCs system design, and operating conditions.…”

Section: Introductionmentioning

confidence: 99%