The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Martin Z Bazant - One of the best experts on this subject based on the ideXlab platform.
-
performance and degradation of a lithium bromine rechargeable fuel cell using highly concentrated Catholytes
Electrochimica Acta, 2016Co-Authors: Peng Bai, Martin Z BazantAbstract:Abstract Lithium-air batteries have been considered as ultimate solutions for the power source of long-range electrified transportation, but state-of-the-art prototypes still suffer from short cycle life, low efficiency and poor power output. Here, a lithium-bromine rechargeable fuel cell using highly concentrated bromine Catholytes is demonstrated with comparable specific energy, improved power density, and higher efficiency. The cell is similar in structure to a hybrid-electrolyte Li-air battery, where a lithium metal anode in nonaqueous electrolyte is separated from aqueous bromine Catholytes by a lithium-ion conducting ceramic plate. The cell with a flat graphite electrode can discharge at a peak power density around 9 mW cm−2 and in principle could provide a specific energy of 791.8 Wh kg−1, superior to most existing cathode materials and Catholytes. It can also run in the regenerative mode to recover the lithium metal anode and free bromine with 80-90% voltage efficiency, without any catalysts. Degradation of the solid electrolyte and the evaporation of bromine during deep charging are challenges that should be addressed in improved designs to fully exploit the high specific energy of the liquid bromine. The proposed system offers a potential power source for long-range electric vehicles, beyond current Li-ion batteries yet close to envisioned Li-air batteries.
-
performance and degradation of a lithium bromine rechargeable fuel cell using highly concentrated Catholytes
arXiv: Chemical Physics, 2016Co-Authors: Peng Bai, Martin Z BazantAbstract:Lithium-air batteries have been considered as ultimate solutions for the power source of long-range electrified transportation, but state-of-the-art prototypes still suffer from short cycle life, low efficiency and poor power output. Here, a lithium-bromine rechargeable fuel cell using highly concentrated bromine Catholytes is demonstrated with comparable specific energy, improved power density, and higher efficiency. The cell is similar in structure to a hybrid-electrolyte Li-air battery, where a lithium metal anode in nonaqueous electrolyte is separated from aqueous bromine Catholytes by a lithium-ion conducting ceramic plate. The cell with a flat graphite electrode can discharge at a peak power density around 9mW cm-2 and in principle could provide a specific energy of 791.8 Wh kg-1, superior to most existing cathode materials and Catholytes. It can also run in regenerative mode to recover the lithium metal anode and free bromine with 80-90% voltage efficiency, without any catalysts. Degradation of the solid electrolyte and the evaporation of bromine during deep charging are challenges that should be addressed in improved designs to fully exploit the high specific energy of liquid bromine. The proposed system offers a potential power source for long-range electric vehicles, beyond current Li-ion batteries yet close to envisioned Li-air batteries.
-
a dual mode rechargeable lithium bromine oxygen fuel cell
228th ECS Meeting (October 11-15 2015), 2015Co-Authors: Peng Bai, Venkatasubramanian Viswanathan, Martin Z BazantAbstract:In order to meet the versatile power requirements of autonomous underwater vehicles (AUV), we propose a rechargeable lithium–bromine/seawater fuel cell with a protected lithium metal anode to provide high specific energy at either low-power mode with seawater (oxygen) or high-power mode with bromine Catholytes. The proof-of-concept fuel cell with a flat catalyst-free graphite electrode can discharge at 3 mW cm−2 with seawater, and 9 mW cm−2 with dilute bromine Catholytes. The fuel cell can also be recharged with LiBr Catholytes efficiently to recover the lithium metal anode. Scanning electron microscopy images reveal that both the organic electrolyte and the bromine electrolyte corrode the solid electrolyte plate quickly, leading to nanoporous pathways that can percolate through the plate, thus limiting the cell performance and lifetime. With improved solid electrolytes or membraneless flow designs, the dual-mode lithium–bromine/oxygen system could enable not only AUV but also land-based electric vehicles, by providing a critical high-power mode to high-energy-density (but otherwise low-power) lithium–air batteries.
P N Sarma - One of the best experts on this subject based on the ideXlab platform.
-
integrated function of microbial fuel cell mfc as bio electrochemical treatment system associated with bioelectricity generation under higher substrate load
Biosensors and Bioelectronics, 2009Co-Authors: Venkata S Mohan, Veer S Raghavulu, Dinakar Peri, P N SarmaAbstract:Function of microbial fuel cell (MFC) as bio-electrochemical treatment system in concurrence with power generation was evaluated with composite chemical wastewater at high loading conditions (18.6 gCOD/l; 56.8 gTDS/l). Two dual chambered MFCs [non-catalyzed graphite electrodes; mediatorless anode] were studied separately with aerated and potassium ferricyanide Catholytes under similar anodic operating conditions [mixed consortia; pH 6]. Marked improvement in power output was observed at applied higher substrate loading rate for extended period of time without any process inhibition. Catholyte nature showed significant influence on power generation [ferricyanide-651 mV; 18.22 mA; 6230 mW/kg COD(R) (500 Omega); 2321.69 mA/m(2) (100 Omega); 11.80 mW/m(3) and aerated-578 mV; 10.23mA; 2450 mW/kg COD(R) (400 Omega); 1220.68 mA/m(2) (100 Omega); 5.64 mW/m(3)] but not on wastewater treatment efficiency. Along with enhanced substrate degradation, relatively good removal of color (31%) and TDS (51%) was also observed during MFC operation, which might be attributed to the diverse bio-electrochemical processes triggered due to substrate metabolism and subsequent in situ bio-potential (voltage) generation. Apart from power generation, various unit operations pertaining to wastewater treatment viz., biological (anaerobic) process, electrochemical decomposition and electrochemical oxidation were found to occur symbiotically in the anode chamber. Among them anaerobic metabolism is considered to be a crucial and important rate limiting step. In view of inherent advantages, function of MFC as integrated bio-electrochemical treatment system in the direction of various wastewater treatment operations can be exploited.
-
effect of anodic ph microenvironment on microbial fuel cell mfc performance in concurrence with aerated and ferricyanide Catholytes
Electrochemistry Communications, 2009Co-Authors: Veer S Raghavulu, Venkata S Mohan, Kannaiah R Goud, P N SarmaAbstract:The performance of dual chambered microbial fuel cell (MFC, Nafion 117, non-catalyzed graphite electrodes) in concurrence with anodic pH microenvironment was evaluated based on bioelectricity generation and wastewater treatment efficiency. Experiments were carried out at different anodic pH microenvironments (acidophilic (6), neutral (7) and alkaline (8)) using both aerated and ferricyanide Catholytes with mixed consortia as anodic biocatalyst employing chemical wastewater. Acidophilic pH in anodic chamber showed effective performance with respect to power output compared to the corresponding neutral and alkaline operations. However, substrate degradation was observed to be higher at neutral condition followed by alkaline and acidophilic operations. Ferricyanide as catholyte showed positive influence on the power output parameters compared to aerated catholyte. Nature of the catholyte did not show any visible influence on the wastewater treatment efficiency.
-
Effect of anodic pH microenvironment on microbial fuel cell (MFC) performance in concurrence with aerated and ferricyanide Catholytes
Elsevier, 2009Co-Authors: Veer S Raghavulu, Venkata S Mohan, Kannaiah R Goud, P N SarmaAbstract:The performance of dual chambered microbial fuel cell (MFC, Nafion 117, non-catalyzed graphite electrodes) in concurrence with anodic pH microenvironment was evaluated based on bioelectricity generation and wastewater treatment efficiency. Experiments were carried out at different anodic pH microenvironments (acidophilic (6), neutral (7) and alkaline (8)) using both aerated and ferricyanide Catholytes with mixed consortia as anodic biocatalyst employing chemical wastewater. Acidophilic pH in anodic chamber showed effective performance with respect to power output compared to the corresponding neutral and alkaline operations. However, substrate degradation was observed to be higher at neutral condition followed by alkaline and acidophilic operations. Ferricyanide as catholyte showed positive influence on the power output parameters compared to aerated catholyte. Nature of the catholyte did not show any visible influence on the wastewater treatment efficiency. Keywords: Bioelectricity, Mixed consortia, Chemical wastewater treatment, Cell potential
-
bioelectricity production from wastewater treatment in dual chambered microbial fuel cell mfc using selectively enriched mixed microflora effect of catholyte
Bioresource Technology, 2008Co-Authors: Venkata S Mohan, G Mohanakrishna, R Saravanan, Veer S Raghavulu, P N SarmaAbstract:Abstract The performance of aerated and ferricyanide Catholytes on the bioelectricity production was evaluated in dual chambered microbial fuel cell (MFC) (mediatroless anode; graphite electrodes) employing selectively enriched H 2 producing mixed consortia as anodic inoculum. Two MFCs with aerated catholyte (MFC AC ) and ferricyanide catholyte (MFC FC ) were operated separately to elucidate the difference in power generation potential and carbon removal efficiency under similar operating conditions [ambient pressure; room temperature (28 ± 2 °C); acidophilic microenvironment (pH 6)]. The experimental data demonstrated the feasibility of in situ bioelectricity generation along with wastewater treatment. Effective power generation and substrate removal efficiency was documented in the fuel cell operated with ferricyanide catholyte (586 mV; 2.37 mA; 0.559 kg COD/m 3 day) than aerated catholyte (572 mV; 1.68 mA; 0.464 kg COD/m 3 day). Maximum power yield (0.635 W/kg COD R and 0.440 W/kg COD R ) and current density (222.59 mA/m 2 and 190.28 mA/m 2 ) was observed at 100 Ω resistor with ferricyanide and aerated Catholytes, respectively. The study documented both wastewater treatment and electricity production through direct conversion of H 2 in a single system.
-
bioelectricity production from wastewater treatment in dual chambered microbial fuel cell mfc using selectively enriched mixed microflora effect of catholyte
Bioresource Technology, 2008Co-Authors: Venkata S Mohan, G Mohanakrishna, R Saravanan, Veer S Raghavulu, P N SarmaAbstract:The performance of aerated and ferricyanide Catholytes on the bioelectricity production was evaluated in dual chambered microbial fuel cell (MFC) (mediatroless anode; graphite electrodes) employing selectively enriched H(2) producing mixed consortia as anodic inoculum. Two MFCs with aerated catholyte (MFC(AC)) and ferricyanide catholyte (MFC(FC)) were operated separately to elucidate the difference in power generation potential and carbon removal efficiency under similar operating conditions [ambient pressure; room temperature (28+/-2 degrees C); acidophilic microenvironment (pH 6)]. The experimental data demonstrated the feasibility of in situ bioelectricity generation along with wastewater treatment. Effective power generation and substrate removal efficiency was documented in the fuel cell operated with ferricyanide catholyte (586 mV; 2.37 mA; 0.559 kg COD/m(3) day) than aerated catholyte (572 mV; 1.68 mA; 0.464 kg COD/m(3) day). Maximum power yield (0.635 W/kg COD(R) and 0.440 W/kg COD(R)) and current density (222.59 mA/m(2) and 190.28 mA/m(2)) was observed at 100 Omega resistor with ferricyanide and aerated Catholytes, respectively. The study documented both wastewater treatment and electricity production through direct conversion of H(2) in a single system.
Bruce E. Logan - One of the best experts on this subject based on the ideXlab platform.
-
increasing desalination by mitigating anolyte ph imbalance using catholyte effluent addition in a multi anode bench scale microbial desalination cell
ACS Sustainable Chemistry & Engineering, 2013Co-Authors: Robert J Davis, Younggy Kim, Bruce E. LoganAbstract:A microbial desalination cell (MDC) uses exoelectrogenic bacteria to oxidize organic matter while desalinating water. Protons produced from the oxidation of organics at the anode result in anolyte acidification and reduce performance. A new method was used here to mitigate anolyte acidification based on adding non-buffered saline catholyte effluent from a previous cycle to the anolyte at the beginning of the next cycle. This method was tested using a larger-scale MDC (267 mL) containing four anode brushes and a three cell pair membrane stack. With an anolyte salt concentration increased by an equivalent of 75 mM NaCl using the catholyte effluent, salinity was reduced by 26.0 ± 0.5% (35 g/L NaCl initial solution) in a 10 h cycle, compared to 18.1 ± 2.0% without catholyte addition. This improvement was primarily due to the increase in buffering capacity of the anolyte, although increased conductivity slightly improved performance as well. There was some substrate loss from the anolyte by diffusion into the ...
-
enhanced hydrogen generation using a saline catholyte in a two chamber microbial electrolysis cell
International Journal of Hydrogen Energy, 2011Co-Authors: Jooyoun Nam, Bruce E. LoganAbstract:Abstract High rates of hydrogen gas production were achieved in a two chamber microbial electrolysis cell (MEC) without a catholyte phosphate buffer by using a saline catholyte solution and a cathode constructed around a stainless steel mesh current collector. Using the non-buffered salt solution (68 mM NaCl) produced the highest current density of 131 ± 12 A/m 3 , hydrogen yield of 3.2 ± 0.3 mol H 2 /mol acetate, and gas production rate of 1.6 ± 0.2 m 3 H 2 /m 3 ·d, compared to MECs with Catholytes externally sparged with CO 2 or containing a phosphate buffer. The salinity of the catholyte achieved a high solution conductivity, and therefore the electrode spacing did not appreciably affect performance. The coulombic efficiency with the cathode placed near the membrane separating the chambers was 83 ± 4%, similar to that obtained with the cathode placed more distant from the membrane (84 ± 4%). Using a carbon cloth cathode instead of the stainless steel mesh cathode did not significantly affect performance, with all reactor configurations producing similar performance in terms of total gas volume, COD removal, r cat and overall energy recovery. These results show MEC performance can be improved by using a saline catholyte without pH control.
-
series assembly of microbial desalination cells containing stacked electrodialysis cells for partial or complete seawater desalination
Environmental Science & Technology, 2011Co-Authors: Bruce E. LoganAbstract:A microbial desalination cell (MDC) is a new approach for desalinating water based on using the electrical current generated by exoelectrogenic bacteria. Previously developed MDCs have used only one or two desalination chambers with substantial internal resistance, and used low salinity Catholytes containing a buffered or acid solution. Here we show that substantially improved MDC performance can be obtained even with a nonbuffered, saline catholyte, by using an electrodialysis stack consisting of 5 pairs of desalting and concentrating cells. When 4 stacked MDCs were used in series (20 total pairs of desalination chambers), the salinity of 0.06 L of synthetic seawater (35 g/L NaCl) was reduced by 44% using 0.12 L of anode solution (2:1). The resistive loss in the electrodialysis stack was negligible due to minimization of the intermembrane distances, and therefore the power densities produced by the MDC were similar to those produced by single chamber microbial fuel cells (MFCs) lacking desalination chamb...
-
Series assembly of microbial desalination cells containing stacked electrodialysis cells for partial or complete seawater desalination
Environmental Science and Technology, 2011Co-Authors: Younggy Kim, Bruce E. LoganAbstract:A microbial desalination cell (MDC) is a new approach for desalinating water based on using the electrical current generated by exoelectrogenic bacteria. Previously developed MDCs have used only one or two desalination chambers with substantial internal resistance, and used low salinity Catholytes containing a buffered or acid solution. Here we show that substantially improved MDC performance can be obtained even with a nonbuffered, saline catholyte, by using an electrodialysis stack consisting of 5 pairs of desalting and concentrating cells. When 4 stacked MDCs were used in series (20 total pairs of desalination chambers), the salinity of 0.06 L of synthetic seawater (35 g/L NaCl) was reduced by 44% using 0.12 L of anode solution (2:1). The resistive loss in the electrodialysis stack was negligible due to minimization of the intermembrane distances, and therefore the power densities produced by the MDC were similar to those produced by single chamber microbial fuel cells (MFCs) lacking desalination chambers. The observed current efficiency was 86%, indicating separation of 4.3 pairs of sodium and chloride ions for every electron transferred through the circuit. With two additional stages (total of 3.8 L of anolyte), desalination was increased to 98% salt removal, producing 0.3 L of fresh water (12.6:1). These results demonstrate that stacked MDCs can be used for efficient desalination of seawater while at the same time achieving power densities comparable to those obtained in MFCs.
Peng Bai - One of the best experts on this subject based on the ideXlab platform.
-
performance and degradation of a lithium bromine rechargeable fuel cell using highly concentrated Catholytes
Electrochimica Acta, 2016Co-Authors: Peng Bai, Martin Z BazantAbstract:Abstract Lithium-air batteries have been considered as ultimate solutions for the power source of long-range electrified transportation, but state-of-the-art prototypes still suffer from short cycle life, low efficiency and poor power output. Here, a lithium-bromine rechargeable fuel cell using highly concentrated bromine Catholytes is demonstrated with comparable specific energy, improved power density, and higher efficiency. The cell is similar in structure to a hybrid-electrolyte Li-air battery, where a lithium metal anode in nonaqueous electrolyte is separated from aqueous bromine Catholytes by a lithium-ion conducting ceramic plate. The cell with a flat graphite electrode can discharge at a peak power density around 9 mW cm−2 and in principle could provide a specific energy of 791.8 Wh kg−1, superior to most existing cathode materials and Catholytes. It can also run in the regenerative mode to recover the lithium metal anode and free bromine with 80-90% voltage efficiency, without any catalysts. Degradation of the solid electrolyte and the evaporation of bromine during deep charging are challenges that should be addressed in improved designs to fully exploit the high specific energy of the liquid bromine. The proposed system offers a potential power source for long-range electric vehicles, beyond current Li-ion batteries yet close to envisioned Li-air batteries.
-
performance and degradation of a lithium bromine rechargeable fuel cell using highly concentrated Catholytes
arXiv: Chemical Physics, 2016Co-Authors: Peng Bai, Martin Z BazantAbstract:Lithium-air batteries have been considered as ultimate solutions for the power source of long-range electrified transportation, but state-of-the-art prototypes still suffer from short cycle life, low efficiency and poor power output. Here, a lithium-bromine rechargeable fuel cell using highly concentrated bromine Catholytes is demonstrated with comparable specific energy, improved power density, and higher efficiency. The cell is similar in structure to a hybrid-electrolyte Li-air battery, where a lithium metal anode in nonaqueous electrolyte is separated from aqueous bromine Catholytes by a lithium-ion conducting ceramic plate. The cell with a flat graphite electrode can discharge at a peak power density around 9mW cm-2 and in principle could provide a specific energy of 791.8 Wh kg-1, superior to most existing cathode materials and Catholytes. It can also run in regenerative mode to recover the lithium metal anode and free bromine with 80-90% voltage efficiency, without any catalysts. Degradation of the solid electrolyte and the evaporation of bromine during deep charging are challenges that should be addressed in improved designs to fully exploit the high specific energy of liquid bromine. The proposed system offers a potential power source for long-range electric vehicles, beyond current Li-ion batteries yet close to envisioned Li-air batteries.
-
a dual mode rechargeable lithium bromine oxygen fuel cell
228th ECS Meeting (October 11-15 2015), 2015Co-Authors: Peng Bai, Venkatasubramanian Viswanathan, Martin Z BazantAbstract:In order to meet the versatile power requirements of autonomous underwater vehicles (AUV), we propose a rechargeable lithium–bromine/seawater fuel cell with a protected lithium metal anode to provide high specific energy at either low-power mode with seawater (oxygen) or high-power mode with bromine Catholytes. The proof-of-concept fuel cell with a flat catalyst-free graphite electrode can discharge at 3 mW cm−2 with seawater, and 9 mW cm−2 with dilute bromine Catholytes. The fuel cell can also be recharged with LiBr Catholytes efficiently to recover the lithium metal anode. Scanning electron microscopy images reveal that both the organic electrolyte and the bromine electrolyte corrode the solid electrolyte plate quickly, leading to nanoporous pathways that can percolate through the plate, thus limiting the cell performance and lifetime. With improved solid electrolytes or membraneless flow designs, the dual-mode lithium–bromine/oxygen system could enable not only AUV but also land-based electric vehicles, by providing a critical high-power mode to high-energy-density (but otherwise low-power) lithium–air batteries.
Venkata S Mohan - One of the best experts on this subject based on the ideXlab platform.
-
integrated function of microbial fuel cell mfc as bio electrochemical treatment system associated with bioelectricity generation under higher substrate load
Biosensors and Bioelectronics, 2009Co-Authors: Venkata S Mohan, Veer S Raghavulu, Dinakar Peri, P N SarmaAbstract:Function of microbial fuel cell (MFC) as bio-electrochemical treatment system in concurrence with power generation was evaluated with composite chemical wastewater at high loading conditions (18.6 gCOD/l; 56.8 gTDS/l). Two dual chambered MFCs [non-catalyzed graphite electrodes; mediatorless anode] were studied separately with aerated and potassium ferricyanide Catholytes under similar anodic operating conditions [mixed consortia; pH 6]. Marked improvement in power output was observed at applied higher substrate loading rate for extended period of time without any process inhibition. Catholyte nature showed significant influence on power generation [ferricyanide-651 mV; 18.22 mA; 6230 mW/kg COD(R) (500 Omega); 2321.69 mA/m(2) (100 Omega); 11.80 mW/m(3) and aerated-578 mV; 10.23mA; 2450 mW/kg COD(R) (400 Omega); 1220.68 mA/m(2) (100 Omega); 5.64 mW/m(3)] but not on wastewater treatment efficiency. Along with enhanced substrate degradation, relatively good removal of color (31%) and TDS (51%) was also observed during MFC operation, which might be attributed to the diverse bio-electrochemical processes triggered due to substrate metabolism and subsequent in situ bio-potential (voltage) generation. Apart from power generation, various unit operations pertaining to wastewater treatment viz., biological (anaerobic) process, electrochemical decomposition and electrochemical oxidation were found to occur symbiotically in the anode chamber. Among them anaerobic metabolism is considered to be a crucial and important rate limiting step. In view of inherent advantages, function of MFC as integrated bio-electrochemical treatment system in the direction of various wastewater treatment operations can be exploited.
-
effect of anodic ph microenvironment on microbial fuel cell mfc performance in concurrence with aerated and ferricyanide Catholytes
Electrochemistry Communications, 2009Co-Authors: Veer S Raghavulu, Venkata S Mohan, Kannaiah R Goud, P N SarmaAbstract:The performance of dual chambered microbial fuel cell (MFC, Nafion 117, non-catalyzed graphite electrodes) in concurrence with anodic pH microenvironment was evaluated based on bioelectricity generation and wastewater treatment efficiency. Experiments were carried out at different anodic pH microenvironments (acidophilic (6), neutral (7) and alkaline (8)) using both aerated and ferricyanide Catholytes with mixed consortia as anodic biocatalyst employing chemical wastewater. Acidophilic pH in anodic chamber showed effective performance with respect to power output compared to the corresponding neutral and alkaline operations. However, substrate degradation was observed to be higher at neutral condition followed by alkaline and acidophilic operations. Ferricyanide as catholyte showed positive influence on the power output parameters compared to aerated catholyte. Nature of the catholyte did not show any visible influence on the wastewater treatment efficiency.
-
Effect of anodic pH microenvironment on microbial fuel cell (MFC) performance in concurrence with aerated and ferricyanide Catholytes
Elsevier, 2009Co-Authors: Veer S Raghavulu, Venkata S Mohan, Kannaiah R Goud, P N SarmaAbstract:The performance of dual chambered microbial fuel cell (MFC, Nafion 117, non-catalyzed graphite electrodes) in concurrence with anodic pH microenvironment was evaluated based on bioelectricity generation and wastewater treatment efficiency. Experiments were carried out at different anodic pH microenvironments (acidophilic (6), neutral (7) and alkaline (8)) using both aerated and ferricyanide Catholytes with mixed consortia as anodic biocatalyst employing chemical wastewater. Acidophilic pH in anodic chamber showed effective performance with respect to power output compared to the corresponding neutral and alkaline operations. However, substrate degradation was observed to be higher at neutral condition followed by alkaline and acidophilic operations. Ferricyanide as catholyte showed positive influence on the power output parameters compared to aerated catholyte. Nature of the catholyte did not show any visible influence on the wastewater treatment efficiency. Keywords: Bioelectricity, Mixed consortia, Chemical wastewater treatment, Cell potential
-
bioelectricity production from wastewater treatment in dual chambered microbial fuel cell mfc using selectively enriched mixed microflora effect of catholyte
Bioresource Technology, 2008Co-Authors: Venkata S Mohan, G Mohanakrishna, R Saravanan, Veer S Raghavulu, P N SarmaAbstract:Abstract The performance of aerated and ferricyanide Catholytes on the bioelectricity production was evaluated in dual chambered microbial fuel cell (MFC) (mediatroless anode; graphite electrodes) employing selectively enriched H 2 producing mixed consortia as anodic inoculum. Two MFCs with aerated catholyte (MFC AC ) and ferricyanide catholyte (MFC FC ) were operated separately to elucidate the difference in power generation potential and carbon removal efficiency under similar operating conditions [ambient pressure; room temperature (28 ± 2 °C); acidophilic microenvironment (pH 6)]. The experimental data demonstrated the feasibility of in situ bioelectricity generation along with wastewater treatment. Effective power generation and substrate removal efficiency was documented in the fuel cell operated with ferricyanide catholyte (586 mV; 2.37 mA; 0.559 kg COD/m 3 day) than aerated catholyte (572 mV; 1.68 mA; 0.464 kg COD/m 3 day). Maximum power yield (0.635 W/kg COD R and 0.440 W/kg COD R ) and current density (222.59 mA/m 2 and 190.28 mA/m 2 ) was observed at 100 Ω resistor with ferricyanide and aerated Catholytes, respectively. The study documented both wastewater treatment and electricity production through direct conversion of H 2 in a single system.
-
bioelectricity production from wastewater treatment in dual chambered microbial fuel cell mfc using selectively enriched mixed microflora effect of catholyte
Bioresource Technology, 2008Co-Authors: Venkata S Mohan, G Mohanakrishna, R Saravanan, Veer S Raghavulu, P N SarmaAbstract:The performance of aerated and ferricyanide Catholytes on the bioelectricity production was evaluated in dual chambered microbial fuel cell (MFC) (mediatroless anode; graphite electrodes) employing selectively enriched H(2) producing mixed consortia as anodic inoculum. Two MFCs with aerated catholyte (MFC(AC)) and ferricyanide catholyte (MFC(FC)) were operated separately to elucidate the difference in power generation potential and carbon removal efficiency under similar operating conditions [ambient pressure; room temperature (28+/-2 degrees C); acidophilic microenvironment (pH 6)]. The experimental data demonstrated the feasibility of in situ bioelectricity generation along with wastewater treatment. Effective power generation and substrate removal efficiency was documented in the fuel cell operated with ferricyanide catholyte (586 mV; 2.37 mA; 0.559 kg COD/m(3) day) than aerated catholyte (572 mV; 1.68 mA; 0.464 kg COD/m(3) day). Maximum power yield (0.635 W/kg COD(R) and 0.440 W/kg COD(R)) and current density (222.59 mA/m(2) and 190.28 mA/m(2)) was observed at 100 Omega resistor with ferricyanide and aerated Catholytes, respectively. The study documented both wastewater treatment and electricity production through direct conversion of H(2) in a single system.