Discover insights from thousands of peer-reviewed papers on microbial electrochemical systems
Priyadharshini Mani, Vallam Thodi Fidal Kumar, Taj Keshavarz et al.
Energies · 2018
Redox mediators could be used to improve the efficiency of microbial fuel cells (MFCs) by enhancing electron transfer rates and decreasing charge transfer resistance at electrodes. However, many artificial redox mediators are expensive and/or toxic. In this study, laccase enzyme was employed as a biocathode of MFCs in the presence of two natural redox mediators (syringaldehyde (Syr) and acetosyringone (As)), and for comparison, a commonly-used artificial mediator 2,2′-azinobis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) was used to investigate their influence on azo dye decolorization and power production. The redox properties of the mediator-laccase systems were studied by cyclic voltammetry. The presence of ABTS and As increased power density from 54.7 ± 3.5 mW m−2 (control) to 77.2 ± 4.2 mW m−2 and 62.5 ± 3.7 mW m−2 respectively. The power decreased to 23.2 ± 2.1 mW m−2 for laccase with Syr. The cathodic decolorization of Acid orange 7 (AO7) by laccase indicated a 12–16% increase in decolorization efficiency with addition of mediators; and the Laccase-Acetosyringone system was the fastest, with 94% of original dye (100 mgL−1) decolorized within 24 h. Electrochemical analysis to determine the redox properties of the mediators revealed that syringaldehyde did not produce any redox peaks, inferring that it was oxidized by laccase to other products, making it unavailable as a mediator, while acetosyringone and ABTS revealed two redox couples demonstrating the redox mediator properties of these compounds. Thus, acetosyringone served as an efficient natural redox mediator for laccase, aiding in increasing the rate of dye decolorization and power production in MFCs. Taken together, the results suggest that natural laccase redox mediators could have the potential to improve dye decolorization and power density in microbial fuel cells.
Nurul Shahzira Hazri, Sahriah Basri, Azran Mohd Zainoodin et al.
Jurnal Kejuruteraan · 2025
Magnesium-air fuel cell (MAFC) is a hybrid system that combines the design of a fuel cell and a battery, requiring a constant replacement of anode and electrolyte to operate. MAFC application is limited for short-term high-power applications like emergency and portable power supplies because of severe corrosion problems impairing the performance of MAFC. Hence, this study focuses on performance by investigating the effect of electrolyte volume, electrodes position, and electrolyte concentration on performance of Mg–air fuel cell. Three sets of experiments were conducted starting with variation in volume of electrolyte. Then, it is applied in the cell configuration to test the MAFC performance with different electrode position. Lastly, the best electrode position is applied to the new modified MAFC together with the chosen electrolyte to investigate the effect of electrolyte concentration on MAFC performance. Finding shows that electrolyte volume not really significant to the performance while higher NaCl concentration can increase the performance of MAFC significantly. 10 wt% of NaCl produce the highest power density of 38.95 mW.cm<sup>-2</sup> and operating voltage of 1.67 V. Unfortunately, higher corrosion rate was observed in higher NaCl concentration. Finally, adding sodium phosphate act as corrosion inhibitor manage to suppress the corrosion reaction and lowers the corrosion rate.
Mosammat Mustari Khanaum, Shafiqur Rahman, Md. Saidul Borhan et al.
Water SA · 2024
Microbial fuel cells (MFCs) represent a promising technology to generate bio-electricity and synchronously reduce wastewater pollutants. The presence of exoelectrogens in wastewater is critical for bio-electricity and pollutant reduction, but the performance of exoelectrogens at different pH levels remains unknown. This study aims to bridge this gap by offering an integrated approach to understanding the performance of exoelectrogens under varying substrate pH, particularly in bio-electricity generation and pollutant reduction in sugarbeet processing wastewater (SBWW). Three pH levels (ranging from acidic to alkaline) were studied and MFC's electricity output was measured. Later, current density, power density, and coulombic efficiency (CE) were calculated. Both pre- and post-experiment substrate samples were analysed with inductively coupled plasma (ICP). Furthermore, 16S rRNA gene analysis, DNA amplification, sequencing library preparation, and bioinformatics workflows on post-experiment samples of the substrate and anode samples were conducted. A diverse community of microorganisms was identified, especially Alphaproteobacteria, Gammaproteobacteria, and Deltaproteobacteria (Geobacter). Bacteroidetes and Desulfovibrio were the major exoelectrogens responsible for electricity generation. Among the three pH levels tested, the most alkaline pH level (9.5±0.1) outperformed the others, achieving a 54% higher power density, 21% greater current density, and a 40% higher CE compared to the acidic pH level (6.5±0.1). Around 50–99% of pollutants were removed from the SBWW. The study revealed that Gammaproteobacteria thrive and perform better in alkaline environment.
Chul Kyu Jin, Jae Hyun Kim, Bong‐Seop Lee et al.
Fuel Cells · 2023
Abstract Stainless steel bipolar plates (BPs) fabricated using innovative additive manufacturing techniques can improve fuel cell performance and reduce costs. A high current density can be obtained using a low‐cost membrane electrode assembly (MEA) with low platinum (Pt) loading at the anode, along with BPs with rectangular micro channels. Three types of BPs of serpentine flow field are designed after varying the width of the rectangular channel. Two types of MEAs are used. First is 0.12 mg cm −2 Pt loading at anode, and the second is 0.50 mg cm −2 . Wherein MEA with Pt loading at 0.12 mg cm −2 is used, a high current density is obtained as the channel width decreases. The BP with 300 µm channels has a current density of 1.205 A cm −2 , which is higher by 31.4% than that of BP with 500 µm channels and higher by 70.2% than that of the BP with 940 µm channels. However, when the MEA with Pt loading at 0.50 mg cm −2 is applied to the test, the opposite results are obtained: As the channel width becomes narrow, the current density decreases. In the long‐term operation, a similar trend in the current density as that of the short‐term operation is observed.
Shih-Hang CHANG, Yuan-Ting TSAO, Kuan-Wei TUNG
Materials Science · 2021
In this study, we investigate the effect of heat treatment on the surface properties of carbon cloth electrodes and on the power generation efficiencies of microbial fuel cells (MFCs) configured with the heat-treated carbon cloth electrodes. Water contact angle measurements show that the hydrophobic surfaces of the carbon cloth became super-hydrophilic after heat treatment at a temperature above 500 °C, making it suitable for bacterial propagation. X-ray photoelectron spectrometry revealed that the signal of the C-O functional group of the carbon cloth electrodes increased in intensity after heat treatment. The MFCs configured with heat-treated carbon cloth electrode exhibited high power density of 16.58 mW/m2, whereas that of the untreated MFCs was only 8.86 mW m2. Compared with other chemical modifications, heat treatment does not use any environmentally unsound acidic or toxic solutions during modification and are promising for manufacturing large-scale MFC stacks.
Hussain & Ismail
IRAQI JOURNAL OF AGRICULTURAL SCIENCES · 2020
Three identically designed microbial fuel cell-constructed wetland (MFC-CW) systems were constructed and setup in this study for simultaneous biotreatment of petroleum refinery wastewater (PRW) and bioelectricity generation. MFC-CW1 and MFC-CW2 were planted with Canna indica, and Phragmites australis, respectively. MFC-CW3 was unplanted and considered as the control. These three systems were operated simultaneously in a batch mode for two cycles to evaluate the effect of PRW biotreatment on the growth and development of the selected plants and the potential of generated bioelectricity as well. The operation period for each cycle was 8 days. Results demonstrated that maximum removal efficiency of the organic content represented as chemical oxygen demand (COD) were 98.75%, 97.67%, and 97.83% observed in MFC-CW1, MFC-CW2, and MFC-CW3, respectively, whereby, the highest power generation were 19.86, 19.04, and 18.7 mW/m2, respectively. On the other hand, both types of plants exhibited notable growth and new sprouts appearance. The potential convergence of the results in the three MFC-CWs, and the healthy growth of both types of plants clearly and potentially indicated that the dominant mechanism of organic pollutant removal was via biodegradation process by the anodic biofilm in the MFC rather than being removed by phytoremediation process.
Livinus A. Obasi, Cornelius O. Nevo
Academia Green Energy · 2024
This study provides a comparative evaluation of the ability of response surface methodology (RSM) and artificial neural network (ANN) to predict the performance of microbial fuel cell (MFC) driven by greywater-syrup substrate system as anolyte with respect to power generation and wastewater treatment. Fourier transform infrared instrumental analysis of the substrate shows the functional groups of compounds present. A 24 central composite design and a three-layered (4:n:1) feedforward ANN architecture trained by a backpropagation algorithm were used to study and predict the MFC process performance criteria. The ANN gave the best prediction with n = 10 neurons. The response variables (power density generation (mW/m2) and chemical oxygen demand (COD) removal efficiency (%)) were measured against four process input variables: mass of the clay component of the proton exchange membrane (PEM) (g), PEM preparation temperature (PPT), anolyte pH, and concentration. Optimal responses with respect to power density and COD removal of 88.3 mW/m2 and 95.2% were recorded at the values of 70 g, 300°C, 8.5, and 66.9 v/v for mass of clay, PPT, pH, and anolyte concentration, respectively. The power density and COD removal predictive abilities of the ANN and RSM models were evaluated in terms of error functions: root mean square error (RMSE) (0.512; 0.0557), chi-square (0.0510; 0.1240), model predictive error (MPE) (0.3326; 0.3526), and coefficient of determination (R2) (0.9954; 0.9051) and RMSE (0.0272; 0.0707), chi-square (0.0280; 0.181), MPE (0.08242; 0.1569), and R2 (0.9932; 0.9245), respectively. These results indicate the superiority of the ANN in predicting the performance of the MFC over the RSM.
Arthur Kerviel, Apostolos Pesyridis, Ahmed Mohammed et al.
Applied Sciences · 2018
Mass-produced, off-the-shelf automotive air compressors cannot be directly used for boosting a fuel cell vehicle (FCV) application in the same way that they are used in internal combustion engines, since the requirements are different. These include a high pressure ratio, a low mass flow rate, a high efficiency requirement, and a compact size. From the established fuel cell types, the most promising for application in passenger cars or light commercial vehicle applications is the proton exchange membrane fuel cell (PEMFC), operating at around 80 °C. In this case, an electric-assisted turbocharger (E-turbocharger) and electric supercharger (single or two-stage) are more suitable than screw and scroll compressors. In order to determine which type of these boosting options is the most suitable for FCV application and assess their individual merits, a co-simulation of FCV powertrains between GT-SUITE and MATLAB/SIMULINK is realised to compare vehicle performance on the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) driving cycle. The results showed that the vehicle equipped with an E-turbocharger had higher performance than the vehicle equipped with a two-stage compressor in the aspects of electric system efficiency (+1.6%) and driving range (+3.7%); however, for the same maximal output power, the vehicle’s stack was 12.5% heavier and larger. Then, due to the existence of the turbine, the E-turbocharger led to higher performance than the single-stage compressor for the same stack size. The solid oxide fuel cell is also promising for transportation application, especially for a use as range extender. The results show that a 24-kWh electric vehicle can increase its driving range by 252% due to a 5 kW solid oxide fuel cell (SOFC) stack and a gas turbine recovery system. The WLTP driving range depends on the charge cycle, but with a pure hydrogen tank of 6.2 kg, the vehicle can reach more than 600 km.
Nur Syafira Khoirunnisa, SYAIFUL ANWAR, DWI ANDREAS SANTOSA
Biodiversitas Journal of Biological Diversity · 2020
Abstract. Khoirunnisa NS, Anwar S, Santosa DA. 2020. Isolation and selection of cellulolytic bacteria from rice straw for consortium of microbial fuel cell. Biodiversitas 21: 1686-1696. Cellulose such as in rice straw can be utilized as an organic substrate in Microbial Fuel Cell (MFC) to generate electricity by microorganisms as a biocatalyst. This research aimed to get cellulose-degrading bacteria with high capability to degrade rice straw and able to be used as consortium with exoelectrogen bacteria in Microbial Fuel Cell. The stages of research included: (i) isolation of the bacteria using carboxymethylcellulose (CMC) agar medium, (ii) selection of the isolates for that purpose, (iii) enzyme assay and MFC performance test, and (iv) identification of selected isolate. There were 125 isolates that were obtained. Selection based on the ability to degrade cellulose as indicated by clear zone on CMC medium resulted in 23 isolates. Ten isolates belong to anaerobic facultative bacteria were selected. Three of them were synergistic with exoelectrogen bacteria. The three isolates were tested for exoglucanase (Avicel) and total enzyme activity (Filter Paper) with the highest results were 6.21 U/mL (isolate J404) and 5.88 U/mL (isolate J401), respectively. The optimum MFC performance was achieved by one isolate, J401, which produced highest voltage of 40.8 mV and a power density of 0.33 mW/m2. The best isolate, J401, was identified as Xanthomonas translucens based on 16S rRNA method.
Yu J. Shen, Olivier Lefebvre, Zi Tan et al.
Water Science and Technology · 2012
Wastewater may contain various potential toxicants. A microbial fuel cell (MFC) is a device in which bacteria convert the chemical energy into electricity. If a toxic event occurs, microbial activity is inhibited and thus the power output of the MFC decreases. Therefore, an MFC could serve as an early toxicity warning device. A real-time biomonitoring system was developed using MFCs to detect the inflow of toxic substances into wastewater treatment systems. After the MFCs reached steady state, a toxic incident was created by adding HCl into the wastewater to alter its pH. Consequently, a rapid decrease in voltage was observed immediately, followed by a subsequent recovery. The optimal MFC design was a single-chamber air cathode MFC, where the anode and cathode were separated by a Selemion proton exchange membrane. Under an external resistance of 5 Ω, the maximum power averaged 0.23 ± 0.023 mW with domestic wastewater. The optimized MFC showed high sensitivity and fast recovery when exposed to the acidic toxic event. When the hydraulic retention time was decreased from 22 to 3.5 min, sensitivity of the MFC increased substantially. Finally, the extent of inhibition observed was found to be related to the toxicity level, suggesting that a dosage–response relationship exists.
Shaik Bajithun, Baranitharan Ethiraj
ECS Transactions · 2022
The main aim of this study is to compare the power generation of Klebsiella variicola and anaerobic sludge operated double chamber MFC (DMFC) using municipal wastewater. Materials and methods: The wastewater samples collected from MFC with Klebsiella variicola (N=32) and anaerobic sludge (N=32) operated for 10 days (G power 80%). Voltage was measured using a multimeter and current, power, and power density was calculated from it for both groups. Results: The power generation was found to be high in Klebsiella variicola (1230mW/m 2 ) operated MFC compared to anaerobic sludge (120mW/m 2 ) due to its ability to form efficient biofilm on the anode surface compared to anaerobic sludge. The Independent sample T test was done which showed that the Klebsiella variicola operated MFC power generation (p<0.001), found to be significantly higher compared to anaerobic sludge. Conclusion: The study shows that Klebsiella variicola operated MFC is able to achieve higher power generation compared to anaerobic sludge.
Ian D. Deninger, Ashna K. Sran, Jason J. Keleher
ECS Meeting Abstracts · 2022
Microbial fuel cells (MFCs) have emerged as a renewable energy source due to their ability for direct conversion of organic substrates into electrical energy. However, issues with low power density, limited long-term stability, and higher operational costs have slowed larger scale integration and adoption. One main factor impacting fuel cell performance is the bacterial interactions at the electrode interface and the associated electron transfer mechanisms which are being widely studied. To increase productive interactions between the microbes and anode, this work focused on the synthetic design of a conductive polysaccharide-based (i.e., agar, alginate, pectin) nanocomposite material. More specifically, metal-carboxyl (Fe 3+ or V 5+ )coordination chemistry was used to photoinitiate the polymerization of polyaniline (PANI) directly on the backbone of the biopolymer matrix increasing the overall uniformity. Results show that the n-doped conducting polymer nanocomposite has enhanced current flow when exposed to E. Coli. Additionally, the electrode surface was modified via non-covalent linkages of organic fuels, such as glucose, with TiO 2 nanoparticles to decrease bacteria-surface repulsions. Initial results show that the sugar functionalized electrodes demonstrated an increased electric response in conjunction with photochemical activity. This phenomenon was observed through decreased fluorescence intensity without a decrease in cell viability as well as increased open circuit potential in the presence of light. This ligand-metal charge transfer coupled with increased conductivity of a biomimetic bulk material has resulted in an overall improved MFC system.
M. Abu Mallouh, B. W. Surgenor, M. Salah et al.
Volume 1: Applied Mechanics; Automotive Systems; Biomedical Biotechnology Engineering; Computational Mechanics; Design; Digital Manufacturing; Education; Marine and Aerospace Applications · 2014
Power management systems are one of the most important components in modern hybrid vehicles. They are needed to optimize the operation of the hybrid system components. In this paper, a model for a fuel cell/battery vehicle is developed using PSAT and then tested with four power management control strategies utilizing the driving cycle of Amman city, the capital of Jordan. The main components of the hybrid vehicle are a PEM fuel cell, battery, and a brushless dc motor. PEM fuel cells are popular due to their good start up, high power density, and low operating temperature. The role of the battery in a hybrid system is to boost the system power during start-up and transient events in addition to storing the energy recovered from the braking process. The developed hybrid vehicle model is designed and configured so that it matches the power, acceleration, and maximum speed of a midsized vehicle powered by an internal combustion engine. The proposed control strategies are the thermostat strategy, fuel cell optimized strategy, load following strategy and fuzzy logic strategy. All four control strategies are implemented in simulation utilizing PSAT. The simulation results indicate that the best performance in terms of fuel economy is achieved by the load following control strategy.
Nannan Guo, Ming C. Leu
Journal of Fuel Cell Science and Technology · 2013
Selective laser sintering (SLS) was used to fabricate graphite composite plates for polymer electrolyte membrane fuel cells, which has the advantages of reducing time and cost associated with the research and development of bipolar plates. Graphite composite plates with three different designs, i.e., parallel in series, interdigitated, and bio-inspired, were fabricated using the SLS process. The performance of these SLS fabricated plates was studied experimentally within a fuel cell assembly under various operating conditions. The effect of temperature, relative humidity, and pressure on fuel cell performance was investigated. In the tests conducted in this study, the best fuel cell performance was achieved with a temperature of 65–75°C, relative humidity of 100%, and back pressure of 2 atm. The performance of fuel cell operating over an extended time was also studied, with the result showing that the SLS fabricated graphite composite plates provided a relatively steady fuel cell output power.
M. C. Nájera, L. Verea, O. Lastres et al.
Fuel Cells · 2020
Abstract This work presents the study of different electrical potentials applied to a carbon cloth material to develop biofilms for their application as bioelectrodes in a microbial fuel cell (MFC). The principal aim of this work was to develop bioanodes and biocathodes for their simultaneous operation in a MFC. The potentials applied were 0.1 V, 0.4 V, and –0.42 V vs . Ag/AgCl KCl reference electrode. Also, electrodes were studied, where a positive potential was applied and gold as the catalyst for oxygen reduction reaction (ORR) was used. The bioelectrodes were characterized with the cyclic voltammetry (CV) technique and the results determined the application of the bioelectrodes as bioanode or biocathode in the MFC. The biofilms formed were observed with the scanning electron microscopy (SEM) technique, and also a new type of electroactive bacteria (Sphingomonas paucimobilis) for biocathodes was identified with a molecular technique. The bioelectrodes developed were tested in a MFC and a maximum power density of 0.585 W m −2 was obtained.
Tunc Catal, Hong Liu, Burak Kilinc et al.
Letters in Applied Microbiology · 2024
Abstract In microbial electrochemical cells (MECs), electroactive microbial biofilms can transmit electrons from organic molecules to anodes. To further understand the production of anodic biofilms, it is essential to investigate the composition and distribution of extracellular polymeric substance (EPS) in the MECs. In this study, the structure of EPS was examined in microbial electrolysis cells from mixed cultures forming biofilm using carbon fiber fabric anode. EPS was extracted from the anode biofilm of microbial electrolysis cells inoculated with mixed microbial culture. The anode biofilm yielded 0.4 mg of EPS, of which 51.2% was humic substance, 16.2% was protein, 12.6% was carbohydrates, and 20% consisted of undetermined substances. Using epifluorescence microscopy, the composition of bacterial cells and their location inside EPS were studied, and the distribution of microbial communities was compared based on current density results in the presence of various carbohydrates. On the electrode surface, bacteria and EPS gathered or overlapped in various locations can affect microbial electrochemical performance. Our findings showed that EPS formation in electroactive biofilms would be important for enhanced efficiency of electricity- or hydrogen-producing microbial electrolysis cells.
Tianwen Zheng, Bin Xu, Yaliang Ji et al.
Research Square · 2020
Abstract Background: The global production of glycerol is increasing year by year since the demands of biodiesel is rising. It is benefit for high-yield succinate synthesis due to its high reducing property. A. succinogenes , a succinate-producing candidate, cannot grow on glycerol anaerobically, as it needs a terminal electron acceptor to maintain the balance of intracellular NADH and NAD + . Microbial fuel cell (MFC) has been widely used to release extra intracellular electrons. However, A. succinogenes is a non-electroactive strain which need the support of electron shuttle in MFC, and pervious research showed that acid tolerant A. succinogenes has higher content of unsaturated fatty acids, which may be beneficial for the transmembrane transport of lipophilic electron shuttle. Results: MFC assisted succinate production was evaluated using neutral red as an electron shuttle to recover the glycerol utilization. Firstly, an acid tolerant mutant JF1315 was selected by atmospheric and room temperature plasma (ARTP) mutagenesis aiming to improve transmembrane transport of neutral red (NR). Additionally, MFC was established to increase the ratio of oxidized NR to reduced NR. By combining these two strategies, ability of JF1315 for glycerol utilization was significantly enhanced, and 23.92 g/L succinate was accumulated with a yield of 0.88 g/g from around 30 g/L initial glycerol, along with an output voltage above 300 mV. Conclusions: A novel MFC-assisted system was established to improve glycerol utilization by A. succinogenes for succinate and electricity production, making this system as a platform for chemicals production and electrical supply simultaneously.
Guotao Sun, Anders Thygesen, Anne Meyer
Energies · 2016
Implementation of microbial fuel cells (MFCs) for electricity production requires effective current generation from waste products via robust cathode reduction. Three cathode types using dissolved oxygen cathodes (DOCs), ferricyanide cathodes (FeCs) and air cathodes (AiCs) were therefore assessed using bioethanol effluent, containing 20.5 g/L xylose, 1.8 g/L arabinose and 2.5 g/L propionic acid. In each set-up the anode and cathode had an electrode surface area of 88 cm2, which was used for calculation of the current density. Electricity generation was evaluated by quantifying current responses to substrate loading rates and external resistance. At the lowest external resistance of 27 Ω and highest substrate loading rate of 2 g chemical oxygen demand (COD) per L·day, FeC-MFC generated highest average current density (1630 mA/m2) followed by AiC-MFC (802 mA/m2) and DOC-MFC (184 mA/m2). Electrochemical impedance spectroscopy (EIS) was used to determine the impedance of the cathodes. It was thereby confirmed that the FeC-MFC produced the highest current density with the lowest internal resistance for the cathode. However, in a setup using bioethanol effluent, the AiC-MFC was concluded to be the most sustainable option since it does not require ferricyanide. The data offer a new add-on option to the straw biorefinery by using bioethanol effluent for microbial electricity production.
Leila Samiee, Sedigheh Sadegh Hassani
Current Nanoscience · 2020
Background: Porous carbon materials are promising candidate supports for various applications. In a number of these applications, doping of the carbon framework with heteroatoms provides a facile route to readily tune the carbon properties. The oxygen reduction reaction (ORR), where the reaction can be catalyzed without precious metals is one of the common applications for the heteroatom-doped carbons. Therefore, heteroatom doped catalysts might have a promising potential as a cathode in Microbial fuel cells (MFCs). MFCs have a good potential to produce electricity from biological oxidization of wastes at the anode and chemical reduction at the cathode. To the best of our knowledge, no studies have been yet reported on utilizing Sulfur trioxide pyridine (STP) and CMK-3 for the preparation of (N and S) doped ordered porous carbon materials. The presence of highly ordered mesostructured and the synergistic effect of N and S atoms with specific structures enhance the oxygen adsorption due to improving the electrocatalytic activity. So the optimal catalyst, with significant stability and excellent tolerance of methanol crossover can be a promising candidate for even other storage and conversion devices. Methods: The physico-chemical properties of the prepared samples were determined by Small Angle X-ray Diffraction (SAXRD), N2 sorption-desorption, Transmission Electron Microscopy (TEM), Field Emission Scanning Electron Microscopy (FESEM) and X-ray Photoelectron Spectroscopy (XPS). The prepared samples were further applied for oxygen reduction reaction (ORR) and the optimal cathode was tested with the Microbial Fuel Cell (MFC) system. Furthermore, according to structural analysis, The HRTEM, and SAXRD results confirmed the formation of well-ordered hexagonal (p6mm) arrays of mesopores in the direction of (100). The EDS and XPS approved that N and S were successfully doped into the CMK-3 carbon framework. Results: Among all the studied CMK-3 based catalysts, the catalyst prepared by STP precursor and pyrolysis at 900°C exhibited the highest ORR activity with the onset potential of 1.02 V vs. RHE and 4 electron transfer number per oxygen molecule in 0.1 M KOH. The high catalyst durability and fuel-crossover tolerance led to stable performance of the optimal cathode after 5000 s operation, while the Pt/C cathode-based was considerably degraded. Finally, the MFC system with the optimal cathode displayed 43.9 mW·m-2 peak power density showing even reasonable performance in comparison to a Pt/C 20 wt.%.cathode. Conclusions: The results revealed that the synergistic effect of nitrogen and sulfur co-doped on the carbon substrate structure leads to improvement in catalytic activity. Also, it was clearly observed that the porous structure and order level of the carbon substrate could considerably change the ORR performance.
Wahyu Rinaldi, Yudha Nurdin, Syahiddin Syahiddin et al.
Jurnal Rekayasa Kimia & Lingkungan · 2014
Penelitian ini mengusulkan sebuah prototipe reaktor microbial fuel cell (MFC) tanpa membran beraliran kontinyu. Dinding Reaktor dibuat dari pipa PVC dan elektroda dari serat karbon. Mikroba yang ditambatkan di anoda bersumber dari larutan FloTank®. Pada penelitian ini digunakan limbah organik artifisial yang dibuat dari glukosa monohidrat dengan konsentrasi 250 mg/L COD. Waktu tinggal limbah divariasikan pada 0,5; 1; 1,5; dan 2 hari. Nilai rata-rata daya listrik yang dihasilkan untuk waktu tinggal limbah 0,5; 1; 1,5; dan 2 hari berturut-turut adalah 38,02; 43,01; 45,35; 46,71 mW/m2, dan daya volumetrik yang dihasilkan adalah 111,25; 125,86; 132,71; dan 136,69 mW/m3. Persentase penurunan Chemical Oxygen Demand (COD) limbah paling tinggi diperoleh pada waktu tinggal 1,5 hari yaitu sebesar 32,26%.
Antonio Castellano-Hinojosa, Manuel J. Gallardo-Altamirano, Clementina Pozo et al.
bioRxiv (Cold Spring Harbor Laboratory) · 2023
Abstract The fish-canning industry generates large quantities of wastewater that typically contains high concentrations of organic matter and salts. However, little is known about the potential valorization of this type of industrial wastewater using the microbial fuel cell (MFC) technology operated in a continuous flow mode. This study investigated the impacts of three different hydraulic retention times (HRT) on the performance, energy production, and prokaryotic and eukaryotic anodic microbiome of an MFC inoculated with activated sludge from a seafood industry and fed with synthetic wastewater that mimics fish-canning effluents. Three consecutive HRTs were studied: 1 day (HRT1), 3 days (HRT3), and 6 days (HRT6) for 30 days, 21 days, and 21 days, respectively. Voltage, current density, and power density were significantly greater at HRT1 compared to HRT3 and HRT6, whereas no differences in coulombic efficiency (CE) were detected among HRTs. Decreases in the efficiency of removal of organic compounds and increases in the abundance of archaeal communities with increased HRT was related to limited energy production at greater HRT. The increased energy production at HRT1 was tightly linked to increased and decreased absolute abundances of bacterial and archaeal communities, respectively. Variations in the HRT significantly impacted the diversity and composition of the prokaryotic community with critical impacts on energy production. The proliferation of known and diverse electroactive microorganisms, such as those belonging to the genera Geobacter , Shewanella , Arcobacter , and Clostridium , was related to increased energy production at HRT1. However, HRT3 and HRT6 enhanced the growth of archaeal methanogens (mainly Methanosarcina sp.), which negatively impacted current production. The eukaryotic community showed less sensitivity to changes in HRT and no significant impact on current production. The carbon oxygen demand and organic matter removal % increased from approximately 20% at HRT1 to almost 60% at HRT6. This study shows there is a critical balance between the HRT and prokaryotic microorganisms contributing to organic removal rate and increases and decreases in energy production in an MFC treating wastewater from the fish-canning industry and operated in a continuous mode.
Pimprapa Chaijak, Alisa Kongthong
Communications in Science and Technology · 2024
This study investigates the effect of microbial configuration on the electrochemical performance of photosynthetic microbial fuel cells (PMFCs). The PMFC configuration incorporating both bacteria and microalgae exhibited the highest open-circuit voltage (OCV) of 397.95 ± 31.53 mV, significantly higher than that of the OCVs obtained in the sterile control (C1) and the microalgae-only configuration (C2), which were 32.47 ± 22.43 mV and 284.59 ± 12.63 mV, respectively. Furthermore, the PMFC containing only microalgae achieved a current density (CD) of 20.96 ± 0.18 mA/m³ and a power density (PD) of 0.40 ± 0.01 mW/m³ under room temperature conditions. Notably, the combined bacteria and microalgae configuration demonstrated a substantial performance improvement, yielding a significantly higher CD of 49.33 ± 0.36 mA/m³ and PD of 0.78 ± 0.01 mW/m³ at room temperature. This configuration also achieved a maximum decolorization of 93.57 ± 0.10% with a corresponding algal biomass recovery of 134.90 ± 2.69 mg/L. These findings highlighted the critical role of microbial composition in PMFC performance. The combination of bacteria and microalgae yielded superior results compared to other configurations under the investigated conditions.
Carmen Fuentes‐Albarrán, Katy Juárez, Sergio Gamboa et al.
Journal of Chemical Technology & Biotechnology · 2020
Abstract BACKGROUND Microbial fuel cell (MFC) power production is limited by the cathodic oxygen reduction reaction (ORR). The quest for platinum‐free materials for improving the cathodic ORR in MFCs is a challenging task. Birnessite‐type MnO 2 /carbon cathodes in MFCs have been rarely reported so far. In this work, a birnessite/C cathode was tested in a MFC. RESULTS A birnessite/C cathode was synthesized (using a rapid, facile and low‐cost method) and its structural and morphological characteristics were assessed. The ORR on such a cathode was investigated using linear sweep voltammetry in a catholyte of 0.8 mol L –1 Na 2 SO 4 , pH 2 (same conditions as those of experimental MFCs). The current density values were higher than those for a plain C cathode. The volumetric power density improved from 224 to 6201 mW m −3 on replacing the plain C cathode with the birnessite/C cathode in a MFC. Deltaproteobacteria were found at the C anode and they were associated with the high power densities obtained. CONCLUSIONS Birnessite/C is a promising cathodic electrode because its synthesis is straightforward, it is not expensive and it could promote the ORR and improve the power density in MFCs. © 2020 Society of Chemical Industry
Siwen Wang, Xiaoling Yang, Yihua Zhu et al.
RSC Adv. · 2013
A solar-assisted microbial fuel cell (MFC) was prepared with flower-like CuInS 2 (CIS) as the photocathode. CIS with flower flakes and monodispersity could be beneficial to electron transfer under irradiation. The solar MFC achieved a maximum power density of 0.108 mW cm −2 and a current density of 0.62 mA cm −2 .
Hyeong Jae Kim, Jun Hyun Kim, Yongwon Jeon et al.
Bulletin of the Korean Chemical Society · 2022
Abstract A microbial fuel cell (MFC) could be adopted as one of the biotechnological new approaches for removing groundwater contaminants of petroleum hydrocarbons such as benzene, toluene, and ethylbenzene, and simultaneously producing electricity. In this study, we have compared performances of single‐chamber MFCs in terms of power density and removal efficiency when operated under two different feeding conditions. In one experiment, benzene, toluene, ethylbenzene, and phenol (BTEP) were individually fed to the MFC reactor without acetate. In another experiment, acetate was added as a co‐substrate. When operated in a batch mode, both cases showed almost complete BTEP removal efficiency while the former case produced negligible power density of ca. 1 mW/m 2 and the latter case 0.13–0.44 W/m 2 . These results imply that MFCs are promising technology for removing petroleum contaminants and for simultaneously producing electricity when suitable organic substances are provided.
Vajihe Yousefi
Energy Harvesting and Systems · 2022
Abstract The performance of four different commercial ceramic separators is inspected using response surface methodology (RSM). The thickness (A), porosity (B), SiO 2 (C), and Al 2 O 3 (D) contents of ceramics are statistically significant ( P -value<0.05) for both responses of the maximum power density (MPD) and the coulombic efficiency (CE). The interactions of AB and AC have significant influences on the MPD. For highly porous ceramics, including the unglazed wall ceramic (MFC-UGWC, 30.45% porosity) and Yellow ceramic (MFC-Y, 28.9% porosity), the MPD and CE are boosted by raising the thickness of membranes. The MPD and CE values have been enhanced from 225.07 to 321.11 mW/m 2 and from 51 to 68%, respectively, by thickening the UGWC from 3 to 9 mm. Similarly, the power performance and CE of the MFC-Y have been grown by 32% and 148.6%, respectively. However, both the MPD and CE responses have been reduced from 106.89 to 57.65 mW/m 2 and from 29 to 18.3% for the denser unglazed floor ceramic (UGFC, 11% porosity) as a consequence of thickness increment from 3 to 6 mm. Furthermore, the chemical composition of ceramics has a crucial impact on the overall performance. Richer ceramics in SiO 2 are utilized, the higher performance is achieved.
N.E. Adesiji, M. Adeoye, A.O. Omojokun et al.
Nigeria Journal of Pure and Applied Physics · 2021
Microbial fuel cell (MFC) is a device that coverts the chemical energy contents of organic matter to electrical energy by the catalytic action of microorganisms. Cow dungs as organic substrates were used in three sets of dual chambered MFCs to study the effects ofelectrodes on the open circuit voltage (OCV) generation of MFC. The anode and cathode compartments were connected using a protonexchange membrane, 1 kg of the cow dung diluted with 500 ml of water was introduced in the anode compartment of each of the setups. The electrode configurations for set-up 1, 2 and 3 respectively were Carbon-Carbon(C-C), carbon-copper(C-Cu) and carbon- zinc(C-Zn). Samples for microbial load count were collected every two days from the anode compartment of the MFC and analyzed using standard microbiological methods. The OCV of the three setups were measured daily for two weeks using a digital multimeter. The microbial load ranged from 4.2 × 104 to 8.5 × 104 CFU/ml for bacteria and 2.1 × 102 to 2.3 × 103 CFU/ml for fungi. The range (average) of the OCV obtained from the set-ups were 0.06 to 0.72 V (0.42 V) for the C–C; 0.02 to 0.67 V (0.26 V) for C-Cu and 0.11 to 0.78 V (0.39 V) for the C-Zn. The OCV for the C-C electrode combination showed an increasing trend while the OCV of C-Cu and C-Zn showed decreasing trends with increasing number of days. The C-C electrode combination gave the best OCV.
 Keywords: microbial fuel cell, open circuit voltage, electrodes, organic substrate
Kiran Sethia, Alka Kaushik, S. K. Jadhav et al.
World Journal of Engineering · 2015
A new approach in the field of renewable energy is- the microbial fuel cells (MFCs). It is a technique to produce bioelectricity from available organic waste. It is helpful to fulfill the lighting requirements of rural areas. The aim of our research work is to construct twocompartment system and to study various parameters like performance of the different combination of electrodes, optimization of pH and temperature. In this study, using bacteria as biocatalyst, the naturally found cow dung was used to generate an open circuit voltage of 0.84 ± 0.010 V and a current of 3.51 ± 0.620 mA. Optimization of various parameters shows that among different temperature range, 37°C temperature gives the highest voltage production of 0.84 ± 0.091 V and current of 3.08 ± 0.512 mA. In case of pH there are not any significant changes were found when pH range is changed. Although, pH 4.0 is found to be more efficient as it produces voltage of 0.90 ± 0.045 V and current of 4.85 ± 0.587 mA. Furthermore, three electrogenic bacterial strains were isolated and studied for their electrogenic properties individually and among them CDB-3 was found best in their performance.
Yohanes A Cahyono, Tilana Madurani, Widya F Azzahra et al.
Advance Sustainable Science, Engineering and Technology · 2019
Microbial fuel cell (MFC) is a technology developed to obtain new sources of renewable energy to produce electricity. It can be an alternative for wastewater treatment and bioenergy producers of renewable electricity. This method requires bacteria to convert substrate in wastewater into electrical energy. The mechanism of MFC were oxidation of substrate by bacteria to produce electrons and protons at the anode. The proton in anode chamber passes through a membrane exchange to the cathode chamber, however the electrons couldn’t through. It caused accumulation of electron in anode chamber and then both of electrode had a potential difference, so electron in anode chamber passed through membrane exchange to cathode chamber. In this study used dual-chambers reactors with each compartment having 8 cm × 10 cm × 10 cm of dimensions and 5 mm of thickness. This study was subjected to evaluate the performance of MFC in soybean washing wastewater treatment with bacteria of EM4 to analyze the potentials production of electricity energy. The focus of this study was to evaluate the effect of time to electricity. MFC system was observed for 40 hours, measurement of voltages and electric currents performed every 4 hours. The results showed that there was potential of electricity production from soybean wastewater treatment by MFC. The maximum electricity reached in soybean wastewater media were voltage 441 mV (at 24 h), the electric currents 170 µA and the power density 51, 35 mW/m2 (at 24 h after acclimatization). Increasing of time effect to decreasing of electricity produced.Keywords: bioenergy, electricity, microbial fuel cell, membrane, wastewater soybean
Yayah Luthfiah, Pedy Artsanti
Proceeding International Conference on Science and Engineering · 2017
The performance of electricity producing of Dual Chamber Microbial Fuel Cells (MFCs) using wastewater of tempe industries without glucose addition (as control substrate) and with (2% and 4%) glucose addition was observed. The anode chamber contained a waste substrate and a cathode chamber contained a 0.1 M Potassium Permanganate electrolyte solution. The salt bridge was required to stabilize the charge between the cathode and anode chambers, and the electrodes attached to the anode and cathode chambers as the electron catcher. Voltages and currents were measured using multimeter. Optical Density measured at 486 nm wavelengths was performed to estimate bacterial growth activity. All of the cells were observed for 72 hours of running time. The results of Optical Density curves showed an increasing trend of absorbance during 72 hours of running time. These were in agreement with the resulting power density, which tended to increase until the 48th hour and then relatively stable especially for the substrate with 4% glucose addition. These MFCs system could also reduce COD by 1.52%, 9.76%, and 9.64% on control substrate, 2% glucose addition substrate, and 4% glucose addition substrate, respectively.
Hui-Xu Wei, Rui Qiu, Ai-Yi Li et al.
Research Square · 2023
Abstract Microbial fuel cells (MFCs) are a promising technology for obtaining energy in wastewater. Effective extracellular electron transfer is one of the key factors for its practical application. In this work, carbon dots (CDs) enriched with oxygen-containing groups on the surface were synthesized as an efficient anode modifier using a simple hydrothermal method and common reactants. The experimental results showed that CDs-modified anodes had higher electrical conductivity, and higher hydrophilicity, could load more microorganisms, enhanced electrochemical processes in the anode biofilm, and did not affect the total content of electrobacteria in the biofilm. The CDs-modified MFCs exhibited higher maximum power density (661.1 ± 42.6 mW m − 2 ) and open-circuit voltage (534.50 ± 6.4 mV), which were significantly better than those of the blank group MFCs (484.1 ± 14.1 mW m − 2 and 447.50 ± 12.1 mV). The use of simple carbon materials to improve the microbial loading on the MFCs anode and the electron transfer between the microbial-electrode may provide a new idea for the design of efficient MFCs.
Y. Y. Yan, L. Y. Sung, H. S. Chu et al.
1st International Fuel Cell Science, Engineering and Technology Conference · 2002
The conditions of water content in the proton exchange membrane fuel cell (PEMFC) are studied in this research. It is known that the hydrogen proton should accompany with water molecule in order to drift through the membrane from anode to cathode. This drift force will concern to the fuel cell performance. However, too much water content may result of flooding. When flooding appears, some catalyst surfaces may be covered with water and result of the catalysts inactive. This will reduce the electrochemical reaction rate. Furthermore, due to the water molecule will occupy the space, this will hinder the reactant molecules approaching to the catalyst. Therefore, the management of water for the fuel cells is very important. The performance can be optimized with a better control of cell conditions. Some important conditions that concern to the heat and water management are investigated. They include cell temperature, reactant flow rate, humidity and pressure. A standard single cell stack with active area of 25cm2 was set for this study.
Shinichi Motoda, Motoaki Morita, Sho Tamura
ECS Meeting Abstracts · 2016
For these recent several years, biomass, geothermal, wind power, and the solar power becomes the urgent issues from a development demand that arise from global environment such as the running out crisis of the fossil fuel. However, there are not so many electric power generation systems in conjunction with the ocean accounting for 70% of the surface area of the earth. In the present work, we tried it using marine environment and solar for the purpose of improving a performance of the biofilm battery which was one of the microbial fuel cells (MFC). The biofilm formed to a cathode electrode ennoble the electrode potential and the photocatalytic effect of the TiO 2 film coated metal surface of an anode electrode makes it possible to be an renewable energy source. However, we are not yet put it to a practical use by a reason such the lack of stability in the photocatalytic effect of the titanium dioxide coated on to the stainless steel anode by a plasma spraying technique. Therefore, in this study, we aimed to improve the photocatalytic activity of the anode electrode by developing the electrode which layered titanium dioxide by two phases using the the squeegee method and a plasma gas arc spraying method by improving those properties in the biofilm battery. As a result of measured electrode potential of the TiO 2 electrode, following results were obtained; 1) The photocatalytic potential of the TiO 2 single-layered electrode showed -0.63V (SCE). This made the electrode potential lower 0.13V than that of an electrode conventionally, and improvement of the photocatalytic activity. In addition, reproducibility and stability were observed in the time variations of photo potential. When this electrode assembled in a biofilm battery, the open circuit voltage rose 0.09V in comparison with a battery conventionally, and the maximum power increase 1.33 times enabled. 2) The output of the biofilm battery which assembling double layer TiO 2 anode electrode rose 1.81 times electric power in comparison with previous one. It is thought that the electron which moves from the anatase outer layer to substrate stainless steel through the rutile intermediate layer accelerated by the heterojunction effect at the anatase / rutile interface.
Bustami Ibrahim, Uju Uju, Mudji Ana Yanti
Jurnal Perikanan Terpadu · 2024
Microbial Fuel Cell (MFC) is a technology that uses exoelectrogenic bacteria to produce electrical energy. This study aims to determine the effect of the ratio of natural chitosan and zeolite on the characteristics of the chitosan / zeolite composite membrane as a PEM separator in MFC, to determine the performance of MFC in producing electricity, and to determine the performance of reducing the organic load of fishery wastewater in MFC technology applications. The chitosan/zeolite separator membrane was made with different ratio of chitosan and natural zeolite 1: 3, 1:1, 3: 1, and without a membrane (w/w). The chitosan / zeolite separator membrane is a proton exchange membrane that can transfer 20% positive ions. Separator membrane with a ratio of 3: 1 resulted in a tensile strength value of 0,855 MPa and a water uptake value of 1,8%, and ratio of 1:1 produced the highest conductivity value of 10,57 S/cm, the highest electric voltage was 0,59 V, the highest electric current was 0,51 mA, and the highest electric power was 0,30 mW. The values of COD, BOD, and TAN decreased by 45%, 46%, and 92%, and the pH value increased to 8,4.
Masoud Safarishaal, Mohammad Sarvi
AIP Advances · 2023
An efficient way to raise the proton exchange membrane fuel cell’s (PEMFC’s) power generation efficiency and power supply quality is to use maximum power point tracking (MPPT). Conventional MPPT approaches often have difficulty producing an effective control effect due to the PEMFC’s inherent nonlinear characteristics. Another challenge for systems that track maximum power points is dealing with fast changes in operational conditions that affect FC’s maximum power point (MPP). The main contribution of this study is the introduction of two artificial intelligence-based MPP control approaches for fuel cells operating under rapidly changing operating conditions. These methods are based on imperialist competitive algorithm-trained neural networks and adaptive neuro-fuzzy inference systems (ANFIS) (ICA NN). The proposed approaches determine the fuel cell voltage that corresponds to the maximum power point. Following that, a fuzzy logic controller is used to modify the duty cycle of a DC/DC boost converter for FC MPP tracking. The MATLAB environment is used to run simulations. The results of the proposed method are compared with those of the conventional fuzzy method. The results demonstrate that the suggested solutions function excellently in both normal operating conditions and quickly varying operating conditions. On the other hand, the suggested approaches can quickly locate and monitor the MPP of FC. Additionally, the suggested techniques increase the FC system’s efficiency by absorbing more power.
Richa Srivastava, Kumar Gaurav
Journal of Polymer Engineering · 2024
Abstract The urgent need for clean and affordable energy solutions to combat energy scarcity and global warming is paramount. Fuel cells, particularly microbial fuel cells (MFCs), offer a promising avenue for sustainable energy production. Proton exchange membranes (PEMs) are critical components in MFCs, but the high cost of Nafion, the gold standard PEM, poses a significant challenge. In this pioneering study, we tried to fabricate PEMs by crafting them from polymethyl methacrylate (PMMA), coupled with innovative combinations of potassium thiocyanate (KSCN) and citric acid. The synthesized membranes were studied for their water uptake capacity, ion exchange capacity and potential applications in MFC. The maximum remarkable water uptake capacities of up to 70 % for 10 % KSCN and 64 % for 7.5 % citric acid compositions was observed. Furthermore, these PEMs exhibit ion exchange capacities (IEC) ranging from 0.024 to an impressive 0.69 meq/gm, with the 7.5 % citric acid variant showcasing the highest IEC (0.69 meq/gm). The membranes having better IEC were applied to microbial fuel cell. This results in maximum power density of 50.03 μw/cm 2 , underscoring the tremendous potential these membranes hold as a cost-effective and environmentally friendly alternative to conventional PEMs in MFCs.
Liang Zhang, Xun Zhu, Jun Li et al.
RSC Advances · 2016
Step-feed was introduced to enhance proton transfer in unbuffered MFCs and improved power generation and Coulombic efficiency.
Chi-Yuan Lee, Ya-Ni Huang
Water Science and Technology · 2013
In this study, the electricity generation and organic removal in microbial fuel cells (MFCs) were examined for electrode spacing (ES) covering 5.8, 10.2, 15.1, and 19.5 cm, and for each ES the MFCs were discharged with a series of influent substrates (CODin). Results indicate that organic removal was related to CODin but not to ES. Best chemical oxygen demand (COD) removals of 64–71% could be achieved at CODin around 100 mg COD/L (0.11–0.14 kg COD/m3-day). Best power output 3.32 mW/m2 occurred at ES 5.8 cm and nominal CODin 300 mg COD/L. For every ES, the relationship of electricity generation to local substrate near anode (CODad) could be adequately modeled by Monod-type kinetics. The estimated kinetic constants involve maximum current production, Imax, 15.3–19.6 mA/m2; maximum attainable power output, Pp,max, 4.0–2.5 mW/m2; half-saturation constant of current, Ksi, 22–30 mg COD/L; and half-saturation constant of power, Ksp, 24–90 mg COD/L. This study reveals that the control over ES for improving electricity generation is dependent on the level of CODad, which profoundly affects the optimal design of electrode placement.
Yong Juan Zhang, Zhang Min, Zheng Yang et al.
Advanced Materials Research · 2010
The electrode material has the very important influence to the microbial fuel cell. The different electrode materials were studied for producing the electricity performance to MFC by the activated sludge as the substrate. The results indicated that the anode of graphite pole was 0.63 mW/cm 2 of the area power density. The carbon paper was 60 (0.50mW/cm 2 ). Carbon paper 90 was 0.23mW/cm 2 . Although having the biggest area power density, the general trend of the graphite pole is much lower than others and production of the electricity was not good. Even though the maximum of area power density of graphite pole, it might be the reason for increasing nutritive compound and elevation of temperature. The carbon paper 90 produce the area power density is the steadiest among three poles and its output voltage is a quite stable and low. MFC is excellent under carbon paper 90. The area power density had strong fluctuating scope, the power density is big and the overall value is high under carbon paper 60.
Sarita Ramsaran Yadav, Mangala Lakshmi Ragavan, Sanjeeb Kumar Mandal et al.
Fungal Territory · 2018
In the present study, the efficiency of yeast mediated microbial fuel cell (MFC) was investigated towards degradation of Trypan blue (azo dye) and electricity generation. Five yeast strains viz. SC1, SC2, SCD1, SCD2, and SCD3 were isolated from different sources. The internal resistance of yeast isolates was tested using ferric oxide reduction method. To maximize the power density of MFC, NaCl was added to the medium and NaCl tolerance of yeast strains was tested. Among the five isolates, SC1 and SCD2 showed maximum ferric oxide reduction and NaCl tolerance. Initially, 5 % of SC1 and SCD2 yeast culture were inoculated in wastewater containing azo dye (100 µg/ml) in a H-type MFC chamber and 250 ml conical flask used as a control. Increased growth of yeast strain in MFC chamber was noted compared to conical flask culture. The data of electricity generation was taken for 15 days and electricity generation was measured using the multimeter. Maximum electricity generation was noted in SC1 (950mV) followed by SCD2 (750mV). In addition, SC1 could degrade azo dye more efficiently than SCD2. Therefore, it may be concluded thatSC1 yeast mediated MFC can be used as a potential technology for electricity generation and degradation of azo dye in wastewater.