Microbial Fuel Cell: Recent Developments in Organic Substrate Use and Bacterial Electrode Interaction

Fadzli, Fatin Syahirah; Bhawani, Showkat Ahmad; Mohammad, Rania Edrees Adam

doi:10.1155/2021/4570388

Cited by 57 publications

(44 citation statements)

References 137 publications

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“…According to earlier literature, one of the causes for the voltage trend decreasing throughout operation is the use of organic substrate. The organic substrate must be sufficient to supply fuel for bacterial activities for an extended survival [ 43 , 44 ]. In the present study, both electrodes showed excellent performance because electrodes are used to transport the electrons.…”

Section: Resultsmentioning

confidence: 99%

Utilizing Biomass-Based Graphene Oxide–Polyaniline–Ag Electrodes in Microbial Fuel Cells to Boost Energy Generation and Heavy Metal Removal

et al. 2022

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Although regarded as environmentally stable, bioelectrochemical fuel cells or, microbial fuel cells (MFCs) continue to face challenges with sustaining electron transport. In response, we examined the performance of two graphene composite-based anode electrodes—graphene oxide (GO) and GO–polymer–metal oxide (GO–PANI–Ag)—prepared from biomass and used in MFCs. Over 7 days of operation, GO energy efficiency peaked at 1.022 mW/m2 and GO–PANI–Ag at 2.09 mW/m2. We also tested how well the MFCs could remove heavy metal ions from synthetic wastewater, a secondary application of MFCs that offers considerable benefits. Overall, GO–PANI–Ag had a higher removal rate than GO, with 78.10% removal of Pb(II) and 80.25% removal of Cd(II). Material characterizations, electrochemical testing, and microbial testing conducted to validate the anodes performance confirmed that using new materials as electrodes in MFCs can be an attractive approach to improve the electron transportation. When used with a natural organic substrate (e.g., sugar cane juice), they also present fewer challenges. We also optimized different parameters to confirm the efficiency of the MFCs under various operating conditions. Considering those results, we discuss some lingering challenges and potential possibilities for MFCs.

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Section: Resultsmentioning

confidence: 99%

Utilizing Biomass-Based Graphene Oxide–Polyaniline–Ag Electrodes in Microbial Fuel Cells to Boost Energy Generation and Heavy Metal Removal

et al. 2022

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“…However, the external circuit decayed more rapidly to only about 0.04 V at about 10 h. The reason for the decay of the open-circuit potential and the external-circuit potential may be that after the consumption of the substrate glucose, the electron supply is insufficient, resulting in the decay of the open-circuit potential and a corresponding decay of the external circuit. However, the decay of the external circuit is more rapid due to the consumption of electrons [ 27 – 29 ]. The greater improvement in the electricity production performance of the modified strain compared to that of the original 5D strain may be due to the intracellular accumulation of more NADH after knocking out the gene related to lactate dehydrogenase.…”

Section: Resultsmentioning

confidence: 99%

Improved energy efficiency in microbial fuel cells by bioethanol and electricity co-generation

Xie

Wang

et al. 2022

Biotechnol Biofuels

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Background Microbial electricity production has received considerable attention from researchers due to its environmental friendliness and low price. The increase in the number of intracellular electrons in a microbial fuel cell (MFC) helps to improve the MFC performance. Results In this study, we accumulated excess electrons intracellularly by knocking out the gene related to intracellular electron consumption in Saccharomyces cerevisiae, and the elevated intracellular electron pool positively influenced the performances of MFCs in terms of electricity production, while helping to increase ethanol production and achieve ethanol and electricity co-production, which in turn improved the utilization of substrates. The final knockout strain reached a maximum ethanol yield of 7.71 g/L and a maximum power density of 240 mW/m2 in the MFC, which was 12 times higher than that of the control bacteria, with a 17.3% increase in energy utilization. Conclusions The knockdown of intracellular electron-consuming genes reported here allowed the accumulation of excess electrons in cells, and the elevated intracellular electron pool positively influenced the electrical production performance of the MFC. Furthermore, by knocking out the intracellular metabolic pathway, the yield of ethanol could be increased, and co-production of ethanol and electricity could be achieved. Thus, the MFC improved the utilization of the substrate.

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“…Thermophotovoltaic [40] p-GaAs/ n-Ge cell /p-Ge/ Allowing greater absorbency of the light source, compact cell layers with band-gap energy-optimized 10.9 % Piezoelectric [41] KNN/Mn/KCT Material Along with enhanced densification. Lead-free content Elevated Curie temperature, Piezoelectric coefficient, and electromechanical coupling element 10,000𝑚𝑊/𝑐𝑚 3 Microbial fuel cell [42] Surface field combinations of anode-to-cathode Smooth electrons with reduced internal resistance flow from anode to cathode 6.86𝑊/𝑚 2 At 2.62 𝑚𝐴/𝑐𝑚 2…”

Section: -Future Potential Of Energy Harvesting Technology To Supply Power To Standalone Iot Devicesmentioning

confidence: 99%

Environmental Energy Harvesting Techniques to Power Standalone IoT-Equipped Sensor and Its Application in 5G Communication

Singh

2021

Emerg Sci J

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In the recent few years, due to its significant deployment to meet global demand for smart cities, the Internet of Things (IoT) has gained a lot of attention. Environment energy harvesting devices, which use ambient energy to generate electricity, could be a viable option in near future for charging or powering stand-alone IoT sensors and electronic devices. The key advantages of such energy harvesting gadgets are that they are environmentally friendly, portable, wireless, cost-effective, and compact. It is significant to propos and fabricate an improved, high-quality, economical, and efficient energy harvesting systems to overcome power supply to tiny IoT devices at the remote locations. In this article, various types of mechanisms for harvesting renewable energies that can power sensor enabled IoT locally, as well as its associated wireless sensor networks (WSNs), are reviewed. These methods are discussed in terms of their advantages and applications, as well as their drawbacks and limitations. Furthermore, methodological performance analysis for the decade 2005 to 2020 is surveyed in order to identify the methods that delivered high output power for each device. Furthermore, the outstanding breakthrough performances of each of the aforementioned micro-power generators during this time period are emphasized. According to the research, thermoelectric modules can convert up to 2500×10^(-3) W/cm^2, thermo-photovoltaic 10.9%, piezoelectric 10,000 mW/cm^3 and microbial fuel cell 6.86 W/m^2 of energy. Doi: 10.28991/esj-2021-SP1-08 Full Text: PDF

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Microbial Fuel Cell: Recent Developments in Organic Substrate Use and Bacterial Electrode Interaction

Cited by 57 publications

References 137 publications

Utilizing Biomass-Based Graphene Oxide–Polyaniline–Ag Electrodes in Microbial Fuel Cells to Boost Energy Generation and Heavy Metal Removal

Utilizing Biomass-Based Graphene Oxide–Polyaniline–Ag Electrodes in Microbial Fuel Cells to Boost Energy Generation and Heavy Metal Removal

Improved energy efficiency in microbial fuel cells by bioethanol and electricity co-generation

Environmental Energy Harvesting Techniques to Power Standalone IoT-Equipped Sensor and Its Application in 5G Communication

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