scholarly journals Investigation of Polymer Biofilm Formation on Titanium-Based Anode Surface in Microbial Fuel Cells with Poplar Substrate

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1833
Author(s):  
Ahmet Erensoy ◽  
Nurettin Çek
Keyword(s):  
Fuel Cells ◽  
Chemical Composition ◽  
Electrode Surface ◽  
Microbial Fuel Cells ◽  
Open Circuit ◽  
Anode Surface ◽  
Natural Soil ◽  
Poplar Wood ◽  
Wood Shavings ◽  
Anode Electrode

Microbial fuel cells (MFCs) have attracted attention by directly converting the bioelectrochemical energy possessed by the organic materials that make up the biomass into electrical energy. In this study, the relationship between the biofilm formed on the titanium-based anode electrode surface, and the chemical composition of the substrate, the energy source of MFC, was investigated. For this, MFCs were made by using poplar wood shavings rich in organic material as the substrate, titanium-based material as the anode electrode, and natural soil as bacterial habitat. Three types of MFCs containing 1%, 10%, and 20% poplar wood shavings by weight were made and named P1-MFC, P2-MFC, and P3-MFC, respectively. According to electrochemical analysis, P3-MFC provided the highest open circuit voltage with 490 mV value, and the highest power density with 5.11 mW/m2 value compared to other MFCs. According to optical microscopy examinations, there were Bacillus and Coccus species of bacteria in the soil structure, and these bacteria also existed around the fiber of poplar wood shavings in MFCs. Scanning electron microscopy (SEM), energy-dispersive spectrum (EDS), and Fourier transform infrared spectroscopy (FTIR) analysis showed that MFCs formed biofilm in the titanium-based anode, and the chemical composition of this biofilm with poplar tree was similar. As a result, due to the catalysis reactions of bacteria, the titanium-based anode electrode surface was coated with polymer biofilm released from poplar wood shavings.

scholarly journals Fabrication and Study of Power- Output of MultiChamber Microbial Fuel Cells (Mfcs) With Clay as Ion Exchange Partition

2017 ◽  
Vol 13 (30) ◽  
pp. 173
Author(s):  
Reuben Yao Tamakloe ◽  
Michael Kweku Edem Donkor ◽  
Keshaw Singh
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Peak Power ◽  
Open Circuit Voltage ◽  
Oxygen Demand ◽  
Open Circuit ◽  
Anode Surface ◽  
Total System ◽  
Generation Efficiency ◽  
Overall Performance

The main challenges in the construction of microbial fuel cells (MFCs) are the identification of materials, designs, and architectures that may maximize power generation efficiency and fabrication cost. In view of these facts, an attempt was made to design and fabricate Multi – Chamber MFCs of different configuration using locally available Mfensi clay as ionexchange partitions. The performance of each micro-cell, combined effect of the total system as one cell, and the overall performance were studied. The volume of each chamber of these cells was approximately 130 cm3 . It was found that the wastewater of chemical oxygen demand (COD) that was 6340 gm/L used in the MFCs yielded a maximum open circuit voltage (OCV) of 1421 ± 30 mV. The peak power density of 33.30 mW/cm2 (0.037 mA/cm2 ) at 1000 Ω was normalized to the anode surface area

scholarly journals Lack of Electricity Production by Pelobacter carbinolicus Indicates that the Capacity for Fe(III) Oxide Reduction Does Not Necessarily Confer Electron Transfer Ability to Fuel Cell Anodes

2007 ◽  
Vol 73 (16) ◽  
pp. 5347-5353 ◽  
Author(s):  
Hanno Richter ◽  
Martin Lanthier ◽  
Kelly P. Nevin ◽  
Derek R. Lovley
Keyword(s):  
Electron Transfer ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Microbial Fuel Cells ◽  
Electron Donors ◽  
Rrna Genes ◽  
Anode Surface ◽  
Oxide Reduction ◽  
Fuel Cell Anodes

ABSTRACT The ability of Pelobacter carbinolicus to oxidize electron donors with electron transfer to the anodes of microbial fuel cells was evaluated because microorganisms closely related to Pelobacter species are generally abundant on the anodes of microbial fuel cells harvesting electricity from aquatic sediments. P. carbinolicus could not produce current in a microbial fuel cell with electron donors which support Fe(III) oxide reduction by this organism. Current was produced using a coculture of P. carbinolicus and Geobacter sulfurreducens with ethanol as the fuel. Ethanol consumption was associated with the transitory accumulation of acetate and hydrogen. G. sulfurreducens alone could not metabolize ethanol, suggesting that P. carbinolicus grew in the fuel cell by converting ethanol to hydrogen and acetate, which G. sulfurreducens oxidized with electron transfer to the anode. Up to 83% of the electrons available in ethanol were recovered as electricity and in the metabolic intermediate acetate. Hydrogen consumption by G. sulfurreducens was important for ethanol metabolism by P. carbinolicus. Confocal microscopy and analysis of 16S rRNA genes revealed that half of the cells growing on the anode surface were P. carbinolicus, but there was a nearly equal number of planktonic cells of P. carbinolicus. In contrast, G. sulfurreducens was primarily attached to the anode. P. carbinolicus represents the first Fe(III) oxide-reducing microorganism found to be unable to produce current in a microbial fuel cell, providing the first suggestion that the mechanisms for extracellular electron transfer to Fe(III) oxides and fuel cell anodes may be different.

scholarly journals Alternative Biofuel Materials for Microbial Fuel Cells from Poplar Wood

2018 ◽  
Vol 3 (40) ◽  
pp. 11251-11257 ◽  
Author(s):  
Ahmet Erensoy ◽  
Nurettin Çek
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Poplar Wood

Effect of Anode Surface Roughness on Power Generation in Microbial Fuel Cells

2012 ◽  
Author(s):  
Zhou Ye ◽  
Junbo Hou ◽  
Michael W. Ellis ◽  
Bahareh Behkam
Keyword(s):  
Surface Roughness ◽  
Fuel Cells ◽  
Glassy Carbon ◽  
Microbial Fuel Cells ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Electrode System ◽  
Anode Surface ◽  
Transfer Resistance ◽  
Rough Electrode

A three-electrode system was used to study the effect of anode surface roughness on the performance of microbial fuel cells (MFCs). Two glassy carbon plates were polished to uniform roughness of the orders of magnitude of 10s of nm and 100s of nm. Atomic force microscopy (AFM) was used to quantify the roughness as well as the 3D topography of the surfaces. Multiple electrochemical methods including potentiostatic tests, potentiodynamic tests, and electrochemical impedance spectroscopy (EIS) were utilized to monitor the performance of the glassy carbon electrodes. After 275 hours of experimentation, the current density generated by the rough electrode was much higher than that generated by the smooth one. Furthermore, the charge-transfer resistance of the rough electrode was lower than that of the smooth one. The better electrochemical performance of the rough surface may be due to denser biofilm grown on the surface, which was observed by scanning electron microscopy (SEM).

Effect of Metal Modification to Carbon Paper Anodes on the Performance of Yeast-Based Microbial Fuel Cells Part Ι: In the Case without Exogenous Mediator

2013 ◽  
Vol 534 ◽  
pp. 76-81 ◽  
Author(s):  
Enas Taha Kasem ◽  
Takuya Tsujiguchi ◽  
Nobuyoshi Nakagawa
Keyword(s):  
Electron Transfer ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Thin Layer ◽  
Electrode Surface ◽  
Microbial Fuel Cells ◽  
Yeast Cells ◽  
Carbon Paper ◽  
Electrode Potentials ◽  
Different Thickness

Effect of modification of carbon paper with a thin layer of cobalt or gold on the performance of yeast-based microbial fuel cells was investigated. The modification was conducted by depositing Co or Au thin layer with different thickness, 5 nm and 30 nm, using a sputtering technique. The electrode performance was evaluated by measuring the electrode potentials and the fuel cell power output. The Co modification significantly increased the performance of the fuel cell, while the Au modification inhibited the performance. SEM observation indicated that the adhesion density of the yeast cells on the electrode surface was affected by the metals. It was confirmed that the electron transfer took place through the surface confined species at the mediatorless anode.

Enhanced open-circuit voltage and power for two types of microbial fuel cells in batch experiments using Saccharomyces cerevisiae as biocatalyst

2018 ◽  
Vol 49 (1) ◽  
pp. 17-26 ◽  
Author(s):  
Silviu-Laurentiu Badea ◽  
Stanica Enache ◽  
Radu Tamaian ◽  
Violeta-Carolina Niculescu ◽  
Mihai Varlam ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Batch Experiments
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