scholarly journals Simultaneous Generation of Bioelectricity and Treatment of Swine Wastewater in a Microbial Fuel Cell

2016 ◽  
Vol 54 ◽  
pp. 100-107 ◽  
Author(s):  
Emmanuel Egbadon ◽  
Campbell O. Akujobi ◽  
Chris O. Nweke ◽  
Wesley Braide ◽  
Cynthia K. Akaluka ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Power Density ◽  
Open Circuit Voltage ◽  
Oxygen Demand ◽  
Open Circuit ◽  
Soluble Solids ◽  
Swine Wastewater ◽  
Percentage Increase ◽  
Simultaneous Generation

This study aimed at the simultaneous treatment of wastewater obtained from swine and generation of bioenergy in form of electricity from the energy stored in the organic component of the wastewater. The Open circuit voltage, current, power density and microbiological and physicochemical parameters were monitored. An initial Open circuit voltage of 516mV, Current of 0.29mA, and Power density of 32.74mW/m2were recorded, which increased to give maximum Open Circuit Voltages of 836mV, Current of 0.49mA, and Power density of 88.45mW/m2. The results revealed that The Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Organic carbon, Total Soluble solids (TSS), Ammonia, Ammonium and Ammonium-Nitrogen all showed percentage decrease of 85.92%, 51.74%, 78.16%, 98.87%, 55.87%, 55.79% and 55.90% respectively while parameters such as Total Dissolved Solids (TDS), Nitrate, Nitrate-Nitrogen, Phosphates, Phosphorus and Orthophosphates however increased after treatment to give a percentage increase of -273.60%, -131.65%, -134.85%, -168.77%, -159.26%, and -157.03% respectively. Bacteria isolates identified at the biofilms on the anode wereCorynebacteriumspecie, Bacillusspecie, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosaandStreptococcus faecalis. The results from this study further exacerbate the Bioelectricity production as well as wastewater treatment potentials of the Microbial Fuel Cell technology.

Preparation of Ce0.8Sm0.2O1.9 Thin Films by Electrophoretic Deposition and their Fuel Cell Performance

2013 ◽  
Vol 566 ◽  
pp. 137-140 ◽  
Author(s):  
Hiroki Ichiboshi ◽  
Kenichi Myoujin ◽  
Takayuki Kodera ◽  
Takashi Ogihara
Keyword(s):  
Thin Films ◽  
Fuel Cell ◽  
Spray Pyrolysis ◽  
Power Density ◽  
Electrophoretic Deposition ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Doped Ceria ◽  
Maximum Power Density ◽  
Fuel Cell Performance

Ce0.8Sm0.2O1.9 (Samaria-doped ceria: SDC) precursors were synthesized by carbon-assisted spray pyrolysis. SDC thin films were prepared by electrophoretic deposition using the SDC precursor particles. The as-prepared SDC thin films were sintered at 1600 °C for 10 h. Uniform films with a thickness of approximately 20 μm were obtained. A fuel cell using the prepared thin films showed a maximum power density of 60.6 mW/cm2 and an open circuit voltage (OCV) of 0.63 V at 700 °C.

scholarly journals Energy capture and nutrients removal enhancement through a stacked constructed wetland incorporated with microbial fuel cell

2017 ◽  
Vol 76 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Lei Xu ◽  
Yaqian Zhao ◽  
Tongyue Wang ◽  
Ranbin Liu ◽  
Fei Gao
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Removal Efficiency ◽  
Oxygen Demand ◽  
Open Circuit ◽  
Cod Removal ◽  
Electrical Performance ◽  
Electricity Production ◽  
Performance Reduction ◽  
Tiered System

To improve the sustainability of constructed wetlands (CWs), a novel tiered wetland system integrated with a microbial fuel cell (MFC) was developed in this study. Compared to the single stage CW, chemical oxygen demand (COD) removal efficiency was improved from 83.2% to 88.7%. More significantly, this tiered system significantly enhanced total nitrogen removal efficiency (an increase from 53.1% to 75.4%). In terms of MFC integration, a gradually decreased performance in electricity production was observed during its 3 months of operation (the voltage dropped from nearly 600 mV to less than 300 mV), which resulted in a reduction of power density from around 2 W/m3 to less than 0.5 W/m3. The deterioration in performance of the air-cathode is the main reason behind this, since the electrode potential of the cathode under open circuit reduced from 348.5 mV to 49.5 mV while the anode potential kept constant at around −400 mV. However, in spite of its electrical performance reduction, it was proved that MFC integration enhanced COD removal and the nitrification process. Further work is needed to improve the stability and feasibility of this new system.

scholarly journals Effects of Concentration Variations on the Performance and Microbial Community in Microbial Fuel Cell Using Swine Wastewater

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2231 ◽  
Author(s):  
Hongjun Ni ◽  
Kaixuan Wang ◽  
Shuaishuai Lv ◽  
Xingxing Wang ◽  
Lu Zhuo ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Microbial Community ◽  
Microbial Fuel Cell ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Community Diversity ◽  
Swine Wastewater ◽  
Anode Chamber ◽  
Response Characteristics ◽  
Concentration Changes

The variation of substrate concentration in anode chamber directly affects the power generation efficiency and decontamination performance of microbial fuel cell (MFC). In this study, three concentrations of swine wastewater with 800 mg/L, 1600 mg/L and 2500 mg/L were selected as substrates, and the performance of MFC and response characteristics of anode microbial community were investigated. The results show that the concentration of a selected substrate is positively correlated with the output voltage of MFC and chemical oxygen demand (COD) removal rate. The microbial community diversity in the anode chamber and the performance of battery can be significantly affected when concentration changes in different ways, which helps to selectively cultivate the adaptable dominant bacteria to enhance the stability and decontamination performance of MFC. The community structure of anodic biofilm is mainly composed of Proteobacteria, Bacteroidetes, Firmicutes, Chloroflexi and Spirochaetae. These findings are meaningful to improve the treatment effects of swine wastewater and can help to find out the mechanism of varying concentration that influences the production of microorganisms in MFC.

Glucose Oxidation by Nano-Fibrous Anodes in a Fuel Cell

2008 ◽  
Author(s):  
Pinchas Schechner ◽  
Eugenia Bubis ◽  
Hana Faiger ◽  
Eyal Zussman ◽  
Ehud Kroll
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Power Density ◽  
Peak Power ◽  
Open Circuit Voltage ◽  
Volume Ratio ◽  
Open Circuit ◽  
High Area ◽  
Micrometer Size ◽  
Oxidation Of Glucose

This work adds more experimental evidence regarding the feasibility of using glucose to fuel fuel-cells with anodes that have a high area-to-volume ratio. Electrospinning was used to fabricate sub-micrometer size fibrous electrocatalytic anode membranes for the oxidation of glucose in an alkaline fuel cell (AFC). The fibers of the membranes were made of polyacrylonitrile (PAN) and coated with silver by electroless plating. The anodes were tested while installed in a membranless fuel cell. The results presented include the open circuit voltage, OCV, the polarization curve, the power density as a function of the current density, and the peak power density, PPD. The measurements were performed with constant concentrations of glucose, 0.8 M, and KOH electrolyte solution, 1M. The performance of the anodes was found to improve as the diameter of the silver-plated fibers decreased. The highest PPD of 0.28 mW/cm2 was obtained with an anode made of plated fibers having a mean fiber diameter of 130 nanometers. We conclude from the results that saccharides in general, and glucose in particular, can serve as fuels for fuel cells, and that silver-plated polymeric electrospun electrodes have advantages due to their large surface area.

scholarly journals Simultaneous Production of Bioethanol and Bioelectricity in a Membrane Less Single Chambered Yeast Fuel Cell by Saccharomyces Cerevisiae and Pichia Fermentans

2021 ◽  
Author(s):  
Akansha Shrivastava ◽  
Mamta Pal ◽  
Rakesh Kumar Sharma
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Power Density ◽  
Ethanol Yield ◽  
Coulombic Efficiency ◽  
Clean Energy ◽  
Open Circuit ◽  
Simultaneous Production ◽  
Electrochemical Technology

Abstract Production of bioethanol and bioelectricity is a promising approach through microbial electrochemical technology. Sugars are metabolized by yeast to produces ethanol, CO2 and energy. Surplus electrons produced during the fermentation can be transferred through the circuit to generate electricity in a Microbial fuel cell (MFC). In the present study, a membrane less single chambered microbial fuel cell was developed for simultaneous production of bioethanol and bioelectricity. Pichia fermentans along with a well-known ethanol producing yeast Saccharomyces cerevisiae was allowed to ferment glucose. S. cerevisiae demonstrated maximum open circuit voltage (OCV) 0.287 ± 0.009 V and power density 4.473 mW m− 2 on 15th day, with a maximum ethanol yield of 5.6% (v/v) on 12th day. P. fermentans demonstrated a maximum OCV of 0.318 ± 0.0039 V and power density of 8.299 mW m− 2 on 15th day with ethanol yield of 4.7 % (v/v) on 12th day. Coulombic efficiency (CE) increased gradually from 0.002–0.471 % and 0.012–0.089 % in the case of S. cerevisiae and P. fermentans, respectively, during 15 days of experiment. Thus, the result indicated that Single chambered fuel cell can be explored for its potential applications for ethanol production along with clean energy generation.

Studies on Power Generation and Wastewater Treatment Using Modified Single Chamber Microbial Fuel Cell

2015 ◽  
Vol 1113 ◽  
pp. 823-827 ◽  
Author(s):  
Nik Mahmood Nik Azmi ◽  
Nazlee Faisal Ghazali ◽  
Ahmad Fikri ◽  
Md Abbas Ali
Keyword(s):  
Power Generation ◽  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Mixed Culture ◽  
Power Density ◽  
Oxygen Demand ◽  
Wastewater Sample ◽  
Single Chamber ◽  
Wastewater Samples

A membrane-less and mediator-less system was designed and tested with wastewater sample as fuel to generate electricity. Microorganisms were first isolated from the wastewater sample to pure culture and were used as the ‘machinery’ that converts wastewater into energy. The wastewater samples were treated either by sterilization or non-sterilization methods. These tests were run using a modified air-cathode single chamber microbial fuel cell (MFC). By sterilizing the wastewater, the calculated power density was much lower compared to non-sterilized wastewater indicating a significant role of microbial activity in the SCMFC system and substrate availability. Furthermore, mixed culture was observed to give larger power density compared to an individual microbe (18.42 ± 5.84 mW/m2 for mixed culture and 8.82 ± 4.56 mW/m2 to 9.46 ± 4.87 mW/m2 for individual microbe, Bukholderi capecia and Acidovorax sp. respectively) to prove that larger power value could be achieved with a mixed microbial system. In addition, the system proved to remove 68.57% of chemical oxygen demand (COD) of the wastewater sample tested. In conclusion, the designed SCMFC has been proven capable of power generation and wastewater treatment comparable to other SCMFCs to date.

Influence of Hydrogen Sulfide in Fuel on Electric Power of Solid Oxide Fuel Cell

2007 ◽  
Vol 544-545 ◽  
pp. 997-1000 ◽  
Author(s):  
Minako Nagamori ◽  
Yoshihiro Hirata ◽  
Soichiro Sameshima
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Electric Power ◽  
Power Density ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Terminal Voltage ◽  
Ceria Electrolyte

Terminal voltage, electric power density and overpotential were measured for the solid oxide fuel cell with gadolinium-doped ceria electrolyte (Ce0.8Gd0.2O1.9, GDC), 30 vol% Ni-GDC anode and Pt cathode using a H2 fuel or biogas (CH4 47, CO2 31, H2 19 vol %) at 1073 K. Addition of 1 ppm H2S in the 3vol % H2O-containing H2 fuel gave no change in the open circuit voltage (0.79 - 0.80 V) and the maximum power density (65 - 72 mW/cm2). Furthermore, no reaction between H2S and Ni in the anode was suggested by the thermodynamic calculation. On the other hand, the terminal voltage and electric power density decreased when 1 ppm H2S gas was mixed with the biogas. After the biogas with 1 ppm H2S flowed into the anode for 8 h, the electric power density decreased from 125 to 90 mW/cm2. The reduced electric power density was also recovered by passing 3 vol % H2O-containing H2 fuel for 2 h.

Submersible microbial fuel cell for electricity production from sewage sludge

2011 ◽  
Vol 64 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Yifeng Zhang ◽  
Lola Gonzalez Olias ◽  
Prawit Kongjan ◽  
Irini Angelidaki
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Sewage Sludge ◽  
Microbial Fuel Cell ◽  
Power Density ◽  
Oxygen Demand ◽  
Maximum Power ◽  
Electricity Production ◽  
Maximum Power Density ◽  
Sludge Concentration

A submersible microbial fuel cell (SMFC) was utilized to treat sewage sludge and simultaneously generate electricity. Stable power generation (145 ± 5 mW/m2, 470 Ω) was produced continuously from raw sewage sludge for 5.5 days. The maximum power density reached 190 ± 5 mW/m2. The corresponding total chemical oxygen demand (TCOD) removal efficiency was 78.1 ± 0.2% with initial TCOD of 49.7 g/L. The power generation of SMFC was depended on the sludge concentration, while dilution of the raw sludge resulted in higher power density. The maximum power density was saturated at sludge concentration of 17 g-TCOD/L, where 290 mW/m2 was achieved. When effluents from an anaerobic digester that was fed with raw sludge were used as substrate in the SMFC, a maximum power density of 318 mW/m2, and a final TCOD removal of 71.9 ± 0.2% were achieved. These results have practical implications for development of an effective system to treat sewage sludge and simultaneously recover energy.

scholarly journals Effect of substrate type and concentration on the performance of a double chamber microbial fuel cell

2019 ◽  
Vol 81 (7) ◽  
pp. 1336-1344 ◽  
Author(s):  
Zia Ullah ◽  
Sheikh Zeshan
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Power Density ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Ohmic Losses ◽  
Different Types ◽  
Double Chamber

Abstract The microbial fuel cell (MFC) provides new opportunities for energy generation and wastewater treatment through conversion of organic matter into electricity by electrogenic bacteria. This study investigates the effect of different types and concentrations of substrates on the performance of a double chamber microbial fuel cell (DCMFC). Three mediator-less laboratory-scale DCMFCs were used in this study, which were equipped with graphite electrode and cation exchange membrane. The MFCs were fed with three different types of substrates (glucose, acetate and sucrose) at a chemical oxygen demand (COD) concentration of 1,000 mg/L. The selected substrate (acetate) was studied for three different concentrations of 500, 2,000 and 3,000 mg/L of COD. Results demonstrated that acetate was the best substrate among the three different substrates with maximum power density and COD removal of 91 mW/m2 and 77%, respectively. Concentration of 2,000 mg/L was the best concentration in terms of performance with maximum power density and COD removal of 114 mW/m2 and 79%, respectively. The polarization curve shows that ohmic losses were dominant in DCMFCs established for all three substrates and concentrations.

scholarly journals Carbon Nanotube Planted on Ni-Based Alloy in Microbial Fuel Cell

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Chin-Tsan Wang ◽  
Yan-Ming Chen ◽  
Zhao-Qin Qi ◽  
Yung-Chin Yang
Keyword(s):  
Power Generation ◽  
Carbon Nanotube ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electrode Materials ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Maximum Power Density ◽  
Power Performance ◽  
Materials Used

The improvement of electrode materials used in microbial fuel cell (MFC) technology for enhancing the power performance of MFCs has attracted more and more attention lately. In this study, an new electrode material with a carbon nanotube planted on an Ni-based alloy substrate is applied to the MFC. Results show that a well-synthesized, straight CNT electrode performs the best, with a high open circuit voltage of 0.82 V and a maximum power density of 2.31 W/m2. It is believed that this new kind of electrode will have a promising future in the technology of power generation from MFCs.

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