Optimum spacing between electrodes in an air-cathode single chamber microbial fuel cell with a low-cost polypropylene separator

Kondaveeti, Sanath; Moon, Jung Mi; Min, Booki

doi:10.1007/s00449-017-1838-3

Cited by 18 publications

(5 citation statements)

References 32 publications

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“…The total internal resistance of an MFC proves to be another vital factor in determining the performance of the cell. The total internal resistance comprises an anode resistance, cathode resistance and ohmic resistance (in the case of membrane-less MFC) (Kondaveeti et al, 2017), The spacing between the electrodes contributes to the ohmic resistance, whereas the geometry or the structure of the anode and cathode affects the anode and cathode resistance. Hence, any change in the structure or spacing affects the resistance of the cell.…”

Section: Resultsmentioning

confidence: 99%

Catalytic effect of acetate (C2H3O2) on coulombic efficiency and bio-electricity generation from wastewater sample prepared from domestic kitchen waste using dual chamber microbial fuel cell technology

Malyan

Mongia

Kumar

2022

JANS

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In recent times, the use of energy resources, particularly non-renewable resources, have increased manifolds due to the ever-increasing global demands. This has led to an increase in depletion of the resources and environmental pollution. Microbial Fuel Cells (MFC) are a new concept that has proved to be the solution to the problem as a green energy resource. The paper focuses on generating electricity from wastewater prepared from kitchen wet waste kept for about 168 hours in an attempt to address the energy crisis while also treating it. A comparative analysis of the sample as prepared and with acetate has been studied and power generation, coulombic efficiency and change in chemical oxygen demand (COD) for wastewater were calculated and also the catalytic effect of acetate was analyzed. It was observed that there was a substantial increase in coulombic efficiency and COD content . A coulombic Efficiency efficiency of 25.29% was obtained for the sample with acetate, whereas, without acetate it was calculated as 9.71%. The maximum power density was obtained from the polarization curves. It was observed that the maximum power density of pure kitchen wastewater was found to be 0.017 mW/m2; however, for kitchen wastewater with acetate, the power density increased considerably to 0.546 mW/m2 at an external resistance of 1Kῼ. Further, the maximum current densities observed were 2.239 mA/m2 and 8.771 mA/m2, respectively. The internal resistance of the constructed prototypes was also determined using the maximum power transfer theorem. In this study, a prototype was constructed and it was found that kitchen waste can be used as a source of electricity generation and leads to a green energy initiative.

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Section: Resultsmentioning

confidence: 99%

Catalytic effect of acetate (C2H3O2) on coulombic efficiency and bio-electricity generation from wastewater sample prepared from domestic kitchen waste using dual chamber microbial fuel cell technology

Malyan

Mongia

Kumar

2022

JANS

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“…This kind of membrane exhibited a relatively small internal ohmic resistances of 2-11 Ω. Higher performances (280 mW m −2 ) were achieved during 280-days operation with single-chamber bottle-type microbial fuel cells (Kondaveeti et al, 2018) and 488 mW m −2 was obtained in polarization analysis with 6 mm distance between electrodes in single-chamber MFCs (Kondaveeti et al, 2017). The architecture of components, indeed, plays a key role in facilitating the transport of ions between electrodes and membrane properties.…”

Section: Introductionmentioning

confidence: 94%

Biochar-Terracotta Conductive Composites: New Design for Bioelectrochemical Systems

Cristiani¹,

Goglio²,

Marzorati³

et al. 2020

Front. Energy Res.

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Research in the field of bioelectrochemical systems is addressing the need to improve components and reduce their costs in the perspective of their large-scale application. In this view, innovative solid separators of electrodes, made of biochar and terracotta, are investigated. Biochar-based composites are produced from giant cane (Arundo Donax L.). Two different types of composite are used in this experiment: composite A, produced by pyrolysis of crushed chipping of A.donax L. mixed clay; and composite B, produced by pyrolysis of already-pyrolyzed giant cane (biochar) mixed with clay. Electrical resistivity, electrical capacity, porosity, water retention, and water leaching of the two composites types (A and B) with 1, 5, 10, 15, 20, and 30 mass percentages of carbon (w/w) are characterized and compared. Less than 1 kΩ cm of electrical resistance is obtained for composite A with a carbon content greater than 10%, while physical and electrical performances of composite B do not significantly change. SEM micrographs and 3D microcomputed tomography of different composite materials are provided, demonstrating a different matrix structure of carbon in the terracotta matrix. The possibility of suitably decreasing electric resistance and increasing water retention/leaching of composite A opens the way for a new class of resistive materials that can be simultaneously used as electrolytic separators and as external electric circuits, allowing a compact microbial fuel cell design. A proof of concept of such an MFC design was provided for different tested composites. Although all the anolytes become anaerobic, only the MFCs equipped with the composite A30% were able to produce power, reaching the maximum power peak in correspondence to resistance of about 1 kΩ. The low, but significant, produced power (about 40 mW m−2, cathode area) confirm that the proposed solution is particularly suitable for nutrient recovery and environment pollution bioremediation, where energy harvesting is not requested.

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“…The PEM can prevent oxygen diffusion from the air cathode to the anode, thus preserving Materials 2024, 17, 1286 2 of 14 the anaerobic environment in the anode chamber. Studies have reported the use of various separation membranes to prevent oxygen diffusion from the cathode to the anode, including ultrafiltration membranes [11], permeable membranes [12], cathode ion exchange membranes [13], and modifications to the air cathode to limit oxygen diffusion [14,15].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Proton Exchange Membrane in Tubular Air-Cathode Microbial Fuel Cells through a Hydrophobic Polymer Coating on a Hydrogel

Huang,

Wu,

et al. 2024

Materials

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The usage time of air-cathode microbial fuel cells (MFCs) is significantly influenced by the moisture content within the proton exchange membrane (PEM). Therefore, enhancing the water retention capability of the PEM by applying a hydrophobic polymer coating to its surface has extended the PEM’s usage time by three times and increased MFCs’ operational duration by 66%. Moreover, the hydrophobic nature of the polymer coating reduces contamination on the PEM and prevents anode liquid from permeating into the air cathode. Towards the end of MFC operation, the internal resistance of the MFC is reduced by 45%. The polymer coating effectively maintained the oxygen reduction reaction activity in the cathode. The polymer coating’s ability to restrict oxygen transmembrane diffusion is demonstrated by experimental data showing a significant decrease in oxygen diffusion coefficient due to its presence. The degradation efficiency of the chemical oxygen demand from 16% to 35% increased by a factor of one.

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Optimum spacing between electrodes in an air-cathode single chamber microbial fuel cell with a low-cost polypropylene separator

Cited by 18 publications

References 32 publications

Catalytic effect of acetate (C2H3O2) on coulombic efficiency and bio-electricity generation from wastewater sample prepared from domestic kitchen waste using dual chamber microbial fuel cell technology

Catalytic effect of acetate (C2H3O2) on coulombic efficiency and bio-electricity generation from wastewater sample prepared from domestic kitchen waste using dual chamber microbial fuel cell technology

Biochar-Terracotta Conductive Composites: New Design for Bioelectrochemical Systems

Enhancing the Proton Exchange Membrane in Tubular Air-Cathode Microbial Fuel Cells through a Hydrophobic Polymer Coating on a Hydrogel

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