Characterization of Bioelectrochemical Fuel Cell Fabricated With Agriculture Wastes and Surface Modified Electrode Materials

2012 ◽  
Vol 9 (2) ◽  
Author(s):  
Subir Paul
Keyword(s):  
Current Density ◽  
Electrode Materials ◽  
Oxygen Demand ◽  
Electrical Energy ◽  
Open Circuit ◽  
Nanoporous Structure ◽  
Anodic Solution ◽  
Polarization Studies ◽  
Surface Modified

A bioelectrochemical fuel was fabricated with pretreated and fermented rice husks. The fuel was characterized with variation of process variables by determination of chemical oxygen demand (COD) which is a measure of the oxygen equivalent of electrochemically oxidizable organic fuel to produce electrical energy. The electrodes of the cell were made with nanoporous pure Al coated with platinum, platinum-ruthenium, and platinum-ruthenium-carbon. Anodization parameters were optimized by studying E-I characteristics in sulfuric and oxalic acids with variation of concentration and temperature. Pore size on the order of 30–50 nm was obtained by a two stage anodization. The performance of the cell was evaluated by determining open circuit potential, E-I characteristics, polarization studies, and cyclic voltammetry. A steady onload potential of 600–800 mV was obtained with current density on the order of 15–25 mA/cm2. High power density of 10–15 mW/cm2 has been obtained with electrode materials coated with Pt + Ru or Pt + Ru + C. The performance of coating on nanoporous structure was greatly reflected in the polarization studies, which showed a huge reduction of polarization resistance and increase of exchange current density by many times, the effect being more for anode with anodic solution, fermented rice husk, than with cathode with phosphate buffer cathodic solution. The surface morphology examined by SEM, showed nanodeposits of Pt, Pt-Ru, and the presence of carbon like structure. XRD peaks clearly reveal presence of Pt, Pt-Ru, and carbon.

Characterization of Bioelectrochemical Fuel Cell Fabricated With Agriculture Wastes and Surface Modified Electrode Materials

2010 ◽  
Author(s):  
Subir Paul ◽  
Saptarshi Nandi ◽  
Sanghita Mridha
Keyword(s):  
Fuel Cell ◽  
Current Density ◽  
Electrode Materials ◽  
Oxygen Demand ◽  
Electrical Energy ◽  
Open Circuit ◽  
Nanoporous Structure ◽  
Anodic Solution ◽  
Polarization Studies ◽  
Surface Modified

A Bioelectrochemical fuel cell was fabricated with pretreated and fermented rice husks. The fuel was characterized with variation of process variables by determination of chemical oxygen demand (COD) which is a measure of the oxygen equivalent of electrochemically oxidizable organic fuel to produce electrical energy. The electrodes of the cell were made with nano porous anodized Al coated with Platinum, Platinum-Ruthenium and Platinum-Ruthenium-Carbon. Anodization parameters were optimized by studying E-I characteristics in sulphuric and oxalic acids with variation of concentration and temperature. Pore size in the order of 30–50 nm was obtained by a two stage anodization. The performance of the cell was evaluated by determining open circuit potential, E-I characteristics, polarization studies and cyclic voltammetry. A steady onload potential of 600–800 mV was obtained with current density in the order of 15–25 mA/cm2. High power density of 10–15 mW/cm2 has been obtained with electrode materials coated with Pt+Ru or Pt+Ru+C. The performance of coating on nanoporous structure was much reflected in the polarization studies, which showed a huge reduction of polarization resistance and increase of exchange current density by many times, the effect being more for anode in anodic solution, fermented rice husk, than with cathode in phosphate buffer cathodic solution. The surface morphology examined by SEM, showed nano deposits of Pt, Pt-Ru and the presence of carbon like structure. XRD peaks clearly reveal presence of Pt, Pt-Ru and carbon.

scholarly journals COD removal from leachate by electrocoagulation process: treatment with monopolar electrodes in parallel connection

2017 ◽  
Vol 77 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Mehtap Tanyol ◽  
Aysenur Ogedey ◽  
Ensar Oguz
Keyword(s):  
Current Density ◽  
Operating Cost ◽  
Oxygen Demand ◽  
Electrical Energy ◽  
Cod Removal ◽  
Iron Electrode ◽  
Time Intervals ◽  
Electrode Distance ◽  
Electrocoagulation Process ◽  
Monopolar Electrodes

Abstract This study examines the removal of chemical oxygen demand (COD) from landfill leachate generated from the municipal landfill site of Bingol, Turkey. The effect of parameters such as current density, pH, and inter-electrode distance during the electrocoagulation (EC) process on COD removal of the process was investigated. Moreover, for COD removal, the energy consumption and operating costs were calculated for iron electrode under the EC conditions. COD removal efficiency was 72.13% at the current density of 16 mA m−2, pH of 8.05, and the inter-electrode distance of 9 mm at the detention time of 60 min with iron electrode and the COD concentration was reduced from 6,100 mg L−1 to 1,700 mg L−1 by EC. The highest value of the electrical energy and electrode consumptions per kg of COD in the optimum conditions were determined as 0.055 kWh kg−1 COD and 3.43 kg kg−1 COD and the highest operating cost value was found to be 1.41 US$ kg−1 COD for 0–60 min time intervals.

scholarly journals UKM2 Chlorella sp. Strain Electricity Performance as Bio-anode under Different Light Wavelength in a Biophotovoltaic Cell

2020 ◽  
Vol 49 (12) ◽  
pp. 3229-3241
Author(s):  
Aisyah Nadhirah Juhari ◽  
Muhd Syazwan Sharani ◽  
Wan Ramli Wan Daud ◽  
Tahereh Jafary ◽  
Mimi Hani Abu Bakar
Keyword(s):  
Power Generation ◽  
Power Density ◽  
Current Density ◽  
Red Light ◽  
Oxygen Demand ◽  
Open Circuit ◽  
Maximum Power ◽  
Trophic Conditions ◽  
Chlorella Sp ◽  
Power Curves

A biophotovoltaic cell (BPV) is an electrobiochemical system that utilises a photosynthetic microorganism for instance is algae to trap sunlight energy and convert it into electricity. In this study, a local algae strain, UKM2 Chlorella sp. was grown in a BPV under different trophic conditions and light wavelengths. Once the acclimatisation phase succeeded, and biofilm formed, power generation by UKM2 algae at the autotrophic mode in synthetic Bold’s Basal media (BBM) under white, blue and red lights were tested. Polarisation and power curves were generated at these different conditions to study the bioelectrochemical performance of the system. Later, the condition switched to algal mixotrophic nutritional mode, with palm oil mill effluent (POME) as substrate. Maximum power generation obtained when using UKM2 in BBM under red light where a power density of 1.19 ± 0.16 W/m3 was obtained at 25.74 ± 3.89 A/m3 current density, while the open circuit voltage OCV reached 226.08 ± 8.71 mV. UKM2 in POME under blue light recorded maximum power density of 0.85 ± 0.18 W/m3 at current density of 16.75 ± 3.54 A/m3, while the OCV reached 214.05 ± 23.82 mV. Chemical oxygen demand (COD) removal reached an efficiency of 35.93%, indicating the ability of wastewater treatment and electricity generation in BPV at the same time.

scholarly journals Electrochemical deposition and characterization of Zn-Fe alloys

2004 ◽  
Vol 69 (10) ◽  
pp. 807-815 ◽  
Author(s):  
Jelena Bajat ◽  
Vesna Miskovic-Stankovic ◽  
Miodrag Maksimovic ◽  
Dragutin Drazic ◽  
Slavica Zec
Keyword(s):  
Chemical Composition ◽  
Current Density ◽  
Phase Structure ◽  
Open Circuit ◽  
Corrosion Properties ◽  
Corrosion Stability ◽  
X Ray ◽  
Fe Alloys ◽  
Deposition Current Density

Zn?Fe alloy electrochemically deposited on steel under various deposition conditions were investigated using anodic linear sweep voltammetry (ALSV) and X-ray diffraction (XRD) analysis for phase structure determination, energy dispersive X-ray (EDX) analysis for determination of chemical composition and polarization measurements and open circuit potential measurements for determination of corrosion properties. The influence of deposition current density on the chemical composition, phase structure and corrosion stability of Zn?Fe alloys was studied. It was shown that deposition current density strongly affects the corrosion stability of Zn?Fe alloys, while Zn?Fe alloy electrodeposited at 4Adm-2 exhibited the lowest corrosion rate.

scholarly journals UKM2 Chlorella sp. Strain Electricity Performance as Bio-anode under Different Light Wavelength in a Biophotovoltaic Cell

2020 ◽  
Vol 49 (12) ◽  
pp. 3175-3187
Author(s):  
Aisyah Nadhirah Juhari ◽  
Muhd Syazwan Sharani ◽  
Wan Ramli Wan Daud ◽  
Tahereh Jafary ◽  
Mimi Hani Abu Bakar
Keyword(s):  
Power Generation ◽  
Power Density ◽  
Current Density ◽  
Red Light ◽  
Oxygen Demand ◽  
Open Circuit ◽  
Maximum Power ◽  
Trophic Conditions ◽  
Chlorella Sp ◽  
Power Curves

A biophotovoltaic cell (BPV) is an electrobiochemical system that utilises a photosynthetic microorganism for instance is algae to trap sunlight energy and convert it into electricity. In this study, a local algae strain, UKM2 Chlorella sp. was grown in a BPV under different trophic conditions and light wavelengths. Once the acclimatisation phase succeeded, and biofilm formed, power generation by UKM2 algae at the autotrophic mode in synthetic Bold’s Basal media (BBM) under white, blue and red lights were tested. Polarisation and power curves were generated at these different conditions to study the bioelectrochemical performance of the system. Later, the condition switched to algal mixotrophic nutritional mode, with palm oil mill effluent (POME) as substrate. Maximum power generation obtained when using UKM2 in BBM under red light where a power density of 1.19 ± 0.16 W/m3 was obtained at 25.74 ± 3.89 A/m3 current density, while the open circuit voltage OCV reached 226.08 ± 8.71 mV. UKM2 in POME under blue light recorded maximum power density of 0.85 ± 0.18 W/m3 at current density of 16.75 ± 3.54 A/m3, while the OCV reached 214.05 ± 23.82 mV. Chemical oxygen demand (COD) removal reached an efficiency of 35.93%, indicating the ability of wastewater treatment and electricity generation in BPV at the same time.

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