scholarly journals Plant secondary metabolites induced electron flux in microbial fuel cell: investigation from laboratory-to-field scale

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Dibyojyoty Nath ◽  
M. M. Ghangrekar
Keyword(s):  
Fuel Cell ◽  
Secondary Metabolites ◽  
Microbial Fuel Cell ◽  
Plant Secondary Metabolites ◽  
Pilot Scale ◽  
Electricity Production ◽  
Extracellular Electron Transfer ◽  
Anaerobic Sludge ◽  
Field Scale ◽  
Anodic Chamber

Abstract Wastewater treatment coupled with electricity recovery in microbial fuel cell (MFC) prefer mixed anaerobic sludge as inoculum in anodic chamber than pure stain of electroactive bacteria (EAB), due to robustness and syntrophic association. Genetic modification is difficult to adopt for mixed sludge microbes for enhancing power production of MFC. Hence, we demonstrated use of eco-friendly plant secondary metabolites (PSM) with sub-lethal concentrations to enhance the rate of extracellular electron transfer between EAB and anode and validated it in both bench-scale as well as pilot-scale MFCs. The PSMs contain tannin, saponin and essential oils, which are having electron shuttling properties and their addition to microbes can cause alteration in cell morphology, electroactive behaviour and shifting in microbial population dynamics depending upon concentrations and types of PSM used. Improvement of 2.1-times and 3.8-times in power densities was observed in two different MFCs inoculated with Eucalyptus-extract pre-treated mixed anaerobic sludge and pure culture of Pseudomonas aeruginosa, respectively, as compared to respective control MFCs operated without adding Eucalyptus-extract to inoculum. When Eucalyptus-extract-dose was spiked to anodic chamber (125 l) of pilot-scale MFC, treating septage, the current production was dramatically improved. Thus, PSM-dosing to inoculum holds exciting promise for increasing electricity production of field-scale MFCs.

Electricity Production from Dual Chambers Microbial Fuel Cell Fed with Chicken Manure-Wastewater

2015 ◽  
Vol 3 (1) ◽  
pp. 9-18
Author(s):  
Ali J. Jaeel
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Chicken Manure ◽  
Electricity Production ◽  
Anaerobic Sludge ◽  
Livestock Wastewater ◽  
Graphite Electrodes ◽  
Reliable Source ◽  
Current Densities ◽  
Resistance Value

Chicken manure wastewaters are increasingly being considered a valuable resource of organic compounds. Screened chicken manure was evaluated as a representative solid organic waste. In this study, electricity generation from livestock wastewater (chicken manure) was investigated in a continuous mediator-less horizontal flow microbial fuel cell with graphite electrodes and a selective type of membrane separating the anodic and cathodic compartments of MFC from each other. The performance of MFC was evaluated to livestock wastewater using aged anaerobic sludge. Results revealed that COD and BOD removal efficiencies were up to 88% and 82%, respectively. At an external resistance value of 150 Ω, a maximum power and current densities of 278 m.W/m2 and 683 mA/m2, respectively were obtained, hence MFC utilizing livestock wastewater would be a sustainable and reliable source of bio-energy generation .

Comparison of Various Techniques to Characterize a Single Chamber Microbial Fuel Cell Loaded with Sulfate Reducing Biocatalysts

2012 ◽  
Vol 15 (3) ◽  
pp. 195-201 ◽  
Author(s):  
K. Sathish Kumar ◽  
Omar Solorza-Feria ◽  
Rafael Hernández-Vera ◽  
Gerardo Vazquez-Huerta ◽  
Héctor M. Poggi-Varaldo
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Current Density ◽  
Internal Resistance ◽  
Extracellular Electron Transfer ◽  
Whole Cell ◽  
Single Chamber ◽  
Sulfate Reducing ◽  
Cell Configuration ◽  
Anodic Chamber

A single-chamber microbial fuel cell (SCMFC) with a carbon supported Pt-cathode for the oxygen reduction reaction (ORR), and loaded with a sulfate reducing bacterial consortium as biocatalyst in the anodic chamber was characterized by polarization by variable resistance (VR) and linear sweep voltammetry (LSV) methods. From VR a whole cell configuration maximum volumetric power of 92.5 mW m-3 was attained at a current density of 459 A m-3 and voltage of 0.202 V. The LSV method of whole cell configuration gave a higher maximum power density of 197.5 mW m-3 at current density of 696 mA m-3 at the potential of 0.284V; this disagreement was ascribed to possible reduction of power and potential overshoot with the LSV. There was a fair agreement between internal resistance values of whole cell configuration determined by VR and electrochemical impedance spectroscopy (EIS): 2225 and 2307 Ω , respectively. Yet, internal resistance measured by LSV was 30% lower for the whole cell configuration. Both LSV and EIS show the advantage of reduced potential overshoot; yet, EIS provides more detailed information on equivalent circuit of the cell and resistance contributions of the electrodes, electrolyte and membrane. Further cyclic voltammetry tests gave midpoint potential of -0.215 V vs saturated calomel electrode, a value close to those reported for bacterial cytochromes involved in extracellular electron transfer processes. It is concluded that in spite of particular advantages of some techniques over others, the combination of electrochemical methods can be very valuable for shedding light and internal checking of the main characteristics of a microbial fuel cell.

scholarly journals Electricity Production by the Application of a Low Voltage DC-DC Boost Converter to a Continuously Operating Flat-Plate Microbial Fuel Cell

Energies ◽  
2017 ◽  
Vol 10 (5) ◽  
pp. 596 ◽  
Author(s):  
Young Song ◽  
Hitesh Boghani ◽  
Hong Kim ◽  
Byung Kim ◽  
Taeho Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Flat Plate ◽  
Microbial Fuel Cell ◽  
Low Voltage ◽  
Boost Converter ◽  
Electricity Production

EXPERIMENTAL STUDY OF BIOELECTRICITY-MICROBIAL FUEL CELL FOR ELECTRICITY GENERATION: PERFORMANCE CHARACTERIZATION AND CAPACITY IMPROVEMENT

2017 ◽  
Vol 79 (5-2) ◽  
Author(s):  
Zul Hasrizal Bohari ◽  
Nur Asyhikin Azhari ◽  
Nuraina Nasuha Ab Rahman ◽  
Mohamad Faizal Baharom ◽  
Mohd Hafiz Jali ◽  
...  
Keyword(s):  
Organic Matter ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electrical Power ◽  
Electrical Energy ◽  
Sewage Water ◽  
Electricity Production ◽  
Sample Type ◽  
Series Of Experiments ◽  
The Right

Energy trending lately shown the need of new possible renewable energy. This paper studies about the capability and capacity generating of electricity by using Bio-electricity-Microbial Fuel Cell (Bio-MFC). Bio-MFC is the device that converts chemical energy to electrical energy by using microbes that exist in the sewage water. The energy contained in organic matter can be converted into useful electrical power. MFC can be operated by microbes that transfer electrons from anode to cathode for generating electricity. There are two major goals in this study. The first goal is to determine the performance characteristics of MFCs in this application. Specifically we investigate the relationship between the percentages of organic matter in a sample results in higher electricity production of MFCs power by that sample. As a result, the sewage (wastewater) chosen in the second series experiment because the sewage (wastewater) also produced the highest percentage of organic matter which is around 10%. Due to these, the higher percentage of organic matter corresponds to higher electricity production. The second goal is to determine the condition under which MFC work most efficiently to generating electricity. After get the best result of the combination for the electrode, which is combination of zinc and copper (900mV),the third series of experiments was coducted, that show the independent variable was in the ambient temperature. The reasons of these observations will be explained throughout the paper. The study proved that the electricity production of MFC can be increased by selecting the right condition of sample type, temperature and type of electrode. 

Study on operation of a microbial fuel cell using mesophilic anaerobic sludge

2011 ◽  
Vol 35 (1-3) ◽  
pp. 222-226 ◽  
Author(s):  
Katalin Bélafi-Bako ◽  
Balazs Vajda ◽  
Nandor Nemestothy
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Anaerobic Sludge
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