The mechanism of bioelectricity generation from organic wastes: soil/plant microbial fuel cells

Kacmaz, Gamze Karanfil; Eczacioglu, Numan

doi:10.1080/21622515.2023.2283814

Cited by 5 publications

(3 citation statements)

References 102 publications

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“…The measured COD values are shown in Figure 3c, where a 94% decrease can be observed on the last day (60.3 ± 36.5 mg/L) from its initial value (987.5 ± 10.3 mg/L), showing a decrease of 74% for the 14th day (258.2 ± 30.6 mg/L), which was when the maximum peaks of voltage and electrical current were observed. It has been shown that there is a relationship between the decrease in COD and the values of the electric current; this is due to the activity of electron-producing microbes, which are diminished by the consumption of the organic charge in the substrate [33]. For example, Din et al (2020) used potato waste as substrates in their single-chamber MFCs, observing that the degradation rate is higher than the hydrolysis rate, which could be due to the active oxidation of the substrate by the microorganisms present in the substrate [34].…”

Section: Results and Analysismentioning

confidence: 99%

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Rojas-Flores,

De La Cruz-Noriega,

Cabanillas-Chirinos

et al. 2024

Molecules

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The growing demand for agricultural products has increased exponentially, causing their waste to increase and become a problem for society. Searching for sustainable solutions for organic waste management is increasingly urgent. This research focuses on considering the waste of an Andean tuber, such as Olluco, as a fuel source for generating electricity and becoming a potential sustainable energy source for companies dedicated to this area. This research used Olluco waste as fuel in single-chamber microbial fuel cells using carbon and zinc electrodes. An electric current and electric potential of 6.4 ± 0.4 mA and 0.99 ± 0.09 V were generated, operating with an electrical conductivity of 142.3 ± 6.1 mS/cm and a pH of 7.1 ± 0.2. It was possible to obtain a 94% decrease in COD and an internal resistance of 24.9 ± 2.8 Ω. The power density found was 373.8 ± 28.8 mW/cm2 and the current density was 4.96 A/cm2. On day 14, the cells were connected in earnest, achieving a power of 2.92 V and generating enough current to light an LED light bulb, thus demonstrating the potential that Olluco waste has to be used as fuel in microbial fuel cells.

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Section: Results and Analysismentioning

confidence: 99%

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Rojas-Flores,

De La Cruz-Noriega,

Cabanillas-Chirinos

et al. 2024

Molecules

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“…Likewise, a limitation was observed Bioremediation using MFCs has begun to be called bioelectroremediation, attracting many researchers due to its great potential to obtain a series of benefits in a single experiment [74]. For future developments, individual microorganisms must be used to accelerate the production of electrical energy and bioremediation so that in the future, a consortium of microorganisms that have shown the best results can be used and, in this way, obtain a more efficient MFC than the currently displayed ones [75]. Likewise, the coating of the materials used to manufacture the electrodes is an issue that is gaining importance since electrodes with high electrical conductivity are manufactured from fruit or vegetable waste.…”

Section: Resultsmentioning

confidence: 99%

Reduction of Toxic Metal Ions and Production of Bioelectricity through Microbial Fuel Cells Using Bacillus marisflavi as a Biocatalyst

Segundo,

De La Cruz-Noriega,

Luis

et al. 2024

Molecules

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Industrialization has brought many environmental problems since its expansion, including heavy metal contamination in water used for agricultural irrigation. This research uses microbial fuel cell technology to generate bioelectricity and remove arsenic, copper, and iron, using contaminated agricultural water as a substrate and Bacillus marisflavi as a biocatalyst. The results obtained for electrical potential and current were 0.798 V and 3.519 mA, respectively, on the sixth day of operation and the pH value was 6.54 with an EC equal to 198.72 mS/cm, with a removal of 99.08, 56.08, and 91.39% of the concentrations of As, Cu, and Fe, respectively, obtained in 72 h. Likewise, total nitrogen concentrations, organic carbon, loss on ignition, dissolved organic carbon, and chemical oxygen demand were reduced by 69.047, 86.922, 85.378, 88.458, and 90.771%, respectively. At the same time, the PDMAX shown was 376.20 ± 15.478 mW/cm2, with a calculated internal resistance of 42.550 ± 12.353 Ω. This technique presents an essential advance in overcoming existing technical barriers because the engineered microbial fuel cells are accessible and scalable. It will generate important value by naturally reducing toxic metals and electrical energy, producing electric currents in a sustainable and affordable way.

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“…One of the most addressed challenges to decreasing the overall price and improving the performance of these devices is partially/totally replacing Pt catalysts used at the anode and cathode. − Although a promising strategy for microbial fuel cells , and paper-based μFCs, the use of non-noble metals at the anode side (or of metal-free anodes) delays the onset potential of the reaction, which narrows the difference between the reduction potential ( E cathode ) and the oxidation potential ( E anode ). This effect makes the overall reaction less spontaneous since Δ G = − nFE , where Δ G is the free Gibbs energy of the overall reaction, F is the Faraday constant, and E = E cathode – E anode .…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Investigation of Methanol Electrooxidation on Copper Anodes: Spectroelectrochemical Insights and Energy Conversion in Microfluidic Fuel Cells

Queiroz,

Vital,

Budke

et al. 2024

ACS Appl. Mater. Interfaces

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Here, we comprehensively investigated methanol electrooxidation on Cu-based catalysts, allowing us to build the first microfluidic fuel cell (μFC) equipped with a Cu anode and a metal-free cathode that converts energy from methanol. We applied a simple, fast, small-scale, and surfactant-free strategy for synthesizing Cu-based nanoparticles at room temperature in steady state (ST), under mechanical stirring (MS), or under ultrasonication (US). The morphology evaluation of the Cu-based samples reveals that they have the same nanoparticle (NP) needle-like form. The elemental mapping composition spectra revealed that pure Cu or Cu oxides were obtained for all synthesized materials. In addition to having more Cu 2 O on the surface, sample US had more Cu(OH) 2 than the others, according to X-ray diffractograms and X-ray photoelectron spectroscopy. The sample US is less carbon-contaminated because of the local heating of the sonic bath, which also enhances the cleanliness of the Cu surface. The activity of the Cu NPs was investigated for methanol electrooxidation in an alkaline medium through electrochemical and spectroelectrochemical measurements. The potentiodynamic and potentiostatic experiments showed higher current densities for the NPs synthesized in the US. In situ FTIR experiments revealed that the three synthesized NP materials eletcrooxidize methanol completely to carbonate through formate. Most importantly, all pathways were led without detectable CO, a poisoning molecule not found at high overpotentials. The reaction path using the US electrode experienced an additional round of formate formation and conversion into carbonate (or CO 2 in the thin layer) after 1.0 V (vs. Ag/Ag/Cl), suggesting improved catalysis. The high activity of NPs synthesized in the US is attributed to effective dissociative adsorption of the fuel due to the site's availability and the presence of hydroxyl groups that may fasten the oxidation of adsorbates from the surface. After understanding the surface reaction, we built a mixed-media μFC fed by methanol in alkaline medium and sodium persulfate in acidic medium. The μFC was equipped with Cu NPs synthesized in ultrasonic-bath-modified carbon paper as the anode and metal-free carbon paper as the cathode. Since the onset potential for methanol electrooxidation was 0.45 V and the reduction reaction revealed 0.90 V, the theoretical OCV is 0.45 V, which provides a spontaneous coupled redox reaction to produce power. The μFC displayed 0.56 mA cm −2 of maximum current density and 26 μW cm −2 of peak power density at 100 μL min −1 . This membraneless system optimizes each half-cell individually, making it possible to build fuel cells with noble metal-free anodes and metal-free cathodes.

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The mechanism of bioelectricity generation from organic wastes: soil/plant microbial fuel cells

Cited by 5 publications

References 102 publications

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Potential Use of Andean Tuber Waste for the Generation of Environmentally Sustainable Bioelectricity

Reduction of Toxic Metal Ions and Production of Bioelectricity through Microbial Fuel Cells Using Bacillus marisflavi as a Biocatalyst

A Comprehensive Investigation of Methanol Electrooxidation on Copper Anodes: Spectroelectrochemical Insights and Energy Conversion in Microfluidic Fuel Cells

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