Bioelectricity generation from chemical wastewater treatment in mediatorless (anode) microbial fuel cell (MFC) using selectively enriched hydrogen producing mixed culture under acidophilic microenvironment (original) (raw)
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Fuel, 2008
The possibility of bioelectricity generation from anaerobic chemical wastewater treatment was evaluated in a microbial fuel cell (MFC) [dual-chambered; mediator less anode; aerated cathode; plain graphite electrodes] employing selectively enriched hydrogen producing (acidogenic) mixed culture. Performance of MFC was evaluated at two organic/substrate loading rates (OLR) (1.165 Kg COD/m3-day and 1.404 Kg COD/m3-day) in terms of bioelectricity production and wastewater treatment at ambient pressure and temperature under acidophilic microenvironment (pH 5.5) using non-coated plain graphite electrodes (mediatorless anode; air cathode). Experimental data demonstrated the feasibility of in situ bioelectricity generation along with wastewater treatment. The performance of MFC with respect to power generation and wastewater treatment was found to depend on the applied OLR. Maximum voltage of 716 mV (2.84 mA; OLR −1.165 kg COD/m3-day) and 731 mV (2.97 mA; OLR-1.404 kg COD/m3-day) was observed at stable operating conditions. Substrate degradation rate (SDR) of 0.519 Kg COD/m3-day and 0.858 Kg COD/m3-day was observed at two OLRs studied. Maximum power yield (0.73 W/Kg CODR and 0.49 W Kg/CODR) and current density (339.87 mA/m2 and 355.43 mA/m2) was observed at applied 50 Ω resistance. Fuel cell performance was evaluated employing polarization curve (100 Ω–30 KΩ), Coulombic efficiency (€cb) and cell potentials along with sustainable power yield at stable phase of fuel cell operation. Designed MFC configuration, adopted operating conditions and used parent inoculum showed positive response.
Fuel, 2008
The possibility of bioelectricity generation from anaerobic chemical wastewater treatment was evaluated in a microbial fuel cell (MFC) [dual-chambered; mediator less anode; aerated cathode; plain graphite electrodes] employing selectively enriched hydrogen producing (acidogenic) mixed culture. Performance of MFC was evaluated at two organic/substrate loading rates (OLR) (1.165 Kg COD/m 3 -day and 1.404 Kg COD/m 3 -day) in terms of bioelectricity production and wastewater treatment at ambient pressure and temperature under acidophilic microenvironment (pH 5.5) using non-coated plain graphite electrodes (mediatorless anode; air cathode). Experimental data demonstrated the feasibility of in situ bioelectricity generation along with wastewater treatment. The performance of MFC with respect to power generation and wastewater treatment was found to depend on the applied OLR. Maximum voltage of 716 mV (2.84 mA; OLR À1.165 kg COD/m 3 -day) and 731 mV (2.97 mA; OLR-1.404 kg COD/m 3 -day) was observed at stable operating conditions. Substrate degradation rate (SDR) of 0.519 Kg COD/m 3 -day and 0.858 Kg COD/m 3 -day was observed at two OLRs studied. Maximum power yield (0.73 W/Kg COD R and 0.49 W Kg/COD R ) and current density (339.87 mA/m 2 and 355.43 mA/m 2 ) was observed at applied 50 X resistance. Fuel cell performance was evaluated employing polarization curve (100 X-30 KX), Coulombic efficiency (€ cb ) and cell potentials along with sustainable power yield at stable phase of fuel cell operation. Designed MFC configuration, adopted operating conditions and used parent inoculum showed positive response.
Simultaneous Generation of Bioelectricity and Treatment of Swine Wastewater in a Microbial Fuel Cell
International Letters of Natural Sciences, 2016
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/m 2 were recorded, which increased to give maximum Open Circuit Voltages of 836mV, Current of 0.49mA, and Power density of 88.45mW/m 2. 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 were Corynebacterium specie, Bacillus specie, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Streptococcus faecalis. The results from this study further exacerbate the Bioelectricity production as well as wastewater treatment potentials of the Microbial Fuel Cell technology.
Bioelectricity Production from Abattoir Wastewater Using Microbial Fuel Cells Connected in Series
International Research Journal of Advanced Engineering and Science, 2021
In a bid to further study the possibility of producing bioelectricity from microbial fuel cell (MFC), this study aims at increasing the production of bioelectricity in abattoir wastewater. The wastewater from abattoir was used to construct three different microbial fuel cells and they were connected in series. The voltage of electricity produced was recorded over the period of three days. The physiochemical property of the wastewater was determined. Also the microorganisms present in the wastewater was quantified using pour plate method and the bacteria was identified. The MFC connected in series gave a high voltage, 1.98V. The wastewater had a pH of 6.08 and temperature of 31.4 o C. The result of the physiochemical properties of the wastewater which included; electrical conductivity, total dissolved solids, dissolved oxygen and BOD are 15,150 μ/cm 3 , 10,230, 8.20 mg/L, 6.00 mg/L respectively. The abattoir wastewater has a high average aerobic count of 2.56×10 23 cfu/ml and average anaerobic count of 1.35×10 23 cfu/ml. Isolated bacterial species includes; Actinobacillus,
Bioelectricity generation from agro-industrial waste water using dual-chambered microbial fuel cell
2020
Bioelectricity production from wastewater beside treatment is the main goal offered by microbial fuel cells (MFCs) technology. This study was demonstrated to evaluating the electricity generated by the double-chamber air-cathodic MFC while reducing pollutants from sugar industry wastewater (SIW). A simple double-chamber MFC was configured with Nafion 117 membrane, and operated without adding any chemical mediators. SIW used as an electron donor and was fed in batchmode into the MFC for three consecutive operational cycles. While the maximum MFC output voltage in open circuit (OCV) mode was 890 mV after 24 operational days, the closed circuit voltage (CCV) was 340 mV when 550 ohm as external load was applied. From the polarization curve, the maximum power density of 160.16 mW/m2 as power output was observed at a current density of 320.9 mA/m2. The efficiency of the MFC was measured based on columbic efficiency (CE) and chemical oxygen demand (COD) removal rate. While the CE was 46%, ...
Bioelectrochemistry, 2009
Single chambered mediatorless microbial fuel cell (MFC Nafion-117 membrane) fabricated with non-catalyzed electrodes was operated with open-air cathode to evaluate bioelectricity generation from domestic wastewater under acidogenic conditions (pH, 6) using anaerobic mixed consortia as anodic biocatalyst. Experimental data illustrated the feasibility of bioelectricity generation from domestic wastewater treatment. A steady increase in MFC performance was observed from the first cycle (0.248 V; 27.3 mW/m 2 ; 1.06 W/kg COD R ) during the startup phase prior to stabilization on fourth cycle (0.449 V; 144.6 mW/m 2 ; 4.64 W/kg COD R ). Sharp increase in power generation was observed after the fourth hour (125.4 mW/m 2 ; 289.61 mA/m 2 ) which continued up to the sixth hour (155.92 mW/m 2 ; 325.51 mA/m 2 ) and gradually decreased thereafter. Voltammogram evidenced clear redox peaks (E 0 ′, −0.334 V) related to redox mediator NAD + /NADH (E 0 ′, −0.32 V) suggesting a strong reducing phase. Higher energy (1.33 J) was observed at the fourth hour in concurrence with the effective electron discharge and higher substrate degradation.
Dual-chamber Microbial Fuel Cells (MFCs) were constructed using non-reactive polyacrylic containers of 1100ml with a working volume of 1000ml. 1000ml of the abattoir wastewater was fed into the anode chamber while equal volume 100mM Potassium Ferricyanide solution was fed into the cathode chamber. An Agar-salt Bridge (2% Agar and 1% NaCl) with dimension 10cm×3cm (length and radius) served as Proton Exchange Membrane. Rod-shaped carbon electrodes of length and diameter 12 cm × 1.2 cm were used. The Open circuit voltage, current, power density and physicochemical parameters were monitored. An initial Open circuit voltage of 459 mV, Current of 0.22 mA, and Power density of 22.10mW/m2 were recorded, which increased to give maximum Open Circuit Voltages of 736 mV, Current of 0.46mA, and Power density of 66.43mW/m2. The results also shows a 56.09%, 92.31%, 56.27%, 89.92%, 73.29% and 75.46% decrease for Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Organic Carbon, Total Soluble solids (TSS), Total Dissolved Solids (TDS), Nitrate, and Nitrate-Nitrogen respectively, while a -3.58%, -3.51%, -4.21%, -228.76%, -226.07% and -226.16% increase was observed for Phosphates, Phosphorus, Orthophosphates, Ammonia, Ammonium-Nitrogen and Ammonium respectively. The bacterial isolates identified were Bacillus species, Streptococcus species, Escherichia coli and Staphylococcus aureus. Keywords: Abattoir wastewater treatment, Bioelectricity, Microbial Fuel Cell
Microbial fuel cells: a sustainable solution for bioelectricity generation and wastewater treatment
Biofuels, 2018
A microbial fuel cell (MFC) is an advance device to contend with three-dimensional problems of fossil fuel-based energy production with high-cost and pollution-generating units. It is an emerging technology of wastewater treatment with energy production. It has the potential to utilize wastewater as feed substrate for microorganisms and to generate bio-electricity. MFCs can also applied in carbon capture, bioremediation, biosensing, bio-hydrogen production and desalination. In this review, the major focus is on treatment of wastewater integrated with bioelectricity production by MFC. Information about various designs of MFC, electrode materials, important process parameters (pH, temperature, etc.) and the most recent integrated technology of MFC with natural water bodies (hybrid MFCs) is also reviewed. This technology holds promise for a clean and green environment, and its successful applications provide a new outlook for engineers and scientists.
BIOELECTRICITY PRODUCTION FROM WASTEWATERS USING MICROBIAL FUEL CELL
Global Scientific Journal, 2021
Electricity supply in Nigeria has been a recurring decimal as huge amount of capital is involved. The aim of the study is to produce bioelectricity in a microbial fuel cell (MFC) from wastewaters. Wastewater from abattoir, fish pond, and stream were used to construct a microbial fuel cell and their physiochemical and microbiological properties were determined and the voltage of electricity produced was measured. Wastewaters were separately inoculated using pour plate to determine bacterial counts and type of bacteria in the wastewater. MFC abattoir waste gave the highest voltage (0.77V), followed by fish pond MFC with 0.58V, and least was stream MFC with 0.30V. The pH of the three wastewaters ranged from 6.24-5.60. The MFC with Abattoir wastewater had the highest electrical conductivity (15,150 μ/cm 3), total dissolved solids (10,230), dissolved oxygen (8.20 mg/L), and BOD (6.00 mg/L), while MFC with stream waste water had the least electrical conductivity (600 μ/cm 3), total dissolved solids (390), dissolved oxygen (4.20 mg/L), and BOD (2.00 mg/L). Connection in series gave a voltage 1.89V from three microbial fuel cells constructed with wastewaters from the abattoir. Wastewater from Abattoir obtained the highest count both for aerobic (2.56×10 23 cfu/ml) and anaerobic (1.35×10 23 cfu/ml), while wastewater from the stream gave the least count 1.32×10 23 cfu/ml (aerobic) and at 6.55×10 22 cfu/ml (anaerobic). Isolated bacterial species includes; Actinobacillus,