Influences of electrode distance and electrolysis time on phosphorus precipitation and composition during electrolysis of anaerobic digestion effluent

2021 ◽  
pp. 150114
Author(s):  
Yugo Takabe ◽  
Masaya Fujiyama ◽  
Yukiyo Yamasaki ◽  
Takanori Masuda
Keyword(s):  
Anaerobic Digestion ◽  
Electrolysis Time ◽  
Electrode Distance

The Use of Electrocoagulation Technique for Paper Mill Wastewater Treatment

2017 ◽  
Vol 901 ◽  
pp. 149-153 ◽  
Author(s):  
Galuh Yuliani ◽  
Kinia Mitasari ◽  
Agus Setiabudi
Keyword(s):  
Wastewater Treatment ◽  
Applied Voltage ◽  
Paper Industry ◽  
Paper Mill ◽  
Iron Electrode ◽  
Aluminum Electrode ◽  
Electrolysis Time ◽  
Operational Parameters ◽  
Electrode Distance ◽  
Metal Plates

Electrocoagulation technique has been widely used in wastewater treatment because it is considered as safe, efficient and environmentally friendly. In this research, electrocoagulation cell was constructed using aluminum and iron electrodes. These metal plates were cut into three parts and were arranged in parallel modes. The constructed electrocoagulation cells were then utilized for the treatment of wastewater obtained from local paper industry. Some operational parameters namely electrolysis time, pH, applied voltage, and electrode distance were analyzed. It was found that the optimum conditions were electrolysis time of 60 minute, pH of 7, applied voltage of 14 V and electrode distance of 1.5 cm. For iron electrode, percentage removals of conductivity, turbidity, COD and BOD were 62%, 97%, 37% and 30%, respectively. For aluminum electrode, the percentage removals of conductivity, turbidity, COD and BOD were 42%, 98%, 37% and 50%, respectively.

Electrochemical Treatment of Oilfield Produced Wastewater on Ni-Sb- SnO2/Ti Electrodes

2013 ◽  
Vol 16 (2) ◽  
Author(s):  
Wang Yun-Hai ◽  
Kuang Jun-Yao
Keyword(s):  
Energy Efficiency ◽  
Current Efficiency ◽  
Current Density ◽  
Tin Dioxide ◽  
Electrochemical Treatment ◽  
Cod Removal ◽  
Electrolysis Time ◽  
Removal Ratio ◽  
Electrode Distance

AbstractNickel and antimony doped tin dioxide (NATO) coated titanium electrodes were used for electrochemical treatment of oilfield produced wastewater. The effects of electrode distance, current density and electrolysis time on COD removal ratio, current efficiency, energy efficiency and BOD to COD ratio were investigated. The optimized electrode distance of 5 mm and current density of 6 mA cm

Comparative Research on Treating Vehicle-Washing Wastewater with Two and Three-Dimensional Electrode Method

2013 ◽  
Vol 777 ◽  
pp. 370-374 ◽  
Author(s):  
He Lan Guan
Keyword(s):  
Comparative Research ◽  
Degradation Rate ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Electrolysis Time ◽  
Electrode Distance ◽  
Electrode Method ◽  
Aluminum Electrodes ◽  
Washing Wastewater ◽  
Better Than

Treatment of two-dimensional and three-dimensional electrode method was researched and compared respectively using aluminum electrodes. The influences of voltage, electrolysis time, pH and electrode distance on the result were also discussed. It was found that the degradation rate of wastewater with three-dimensional electrode method was much better than two-dimensional method. For the treatment of vehicle-washing wastewater, the best of voltage was 20V, the electrolysis time was 30 min, and the electrode distance was 2cm.

scholarly journals Electrocoagulation Treatment for Landfill Leachate using Stainless Steel Electrode

2019 ◽  
Vol 9 (1) ◽  
pp. 2851-2855
Keyword(s):  
Stainless Steel ◽  
Landfill Leachate ◽  
Applied Voltage ◽  
Metal Ion ◽  
Oxygen Demand ◽  
Stainless Steel Electrode ◽  
Electrolysis Time ◽  
Steel Electrode ◽  
Electrode Distance ◽  
Wide Range

Electrocoagulation (EC) process uses direct electric current source between metal electrode submerged in the effluent that results in electrode dissolution, with a suitable pH, metal ion can form a wide range of metal hydroxide and coagulated species that destabilized and dissolved contaminants absorbed. Electrocoagulation (EC) has been working for the percentage removal of BOD (Biochemical oxygen demand)/ chemical oxygen demand (COD) ratio, Color and COD on leachate in a batch Electrocoagulation reactor using stainless steel (SS) electrode. EC technology depends on so many factors such as electrode material, initial pH, applied voltage, inter-electrode distance, and electrolysis time. From the experimental work, results reveal that the maximum percentage of removal achieved were COD and Color 73.5% and 65.0% respectively and increasing BOD/COD ratio 0.11 to 0.62. The optimum inter-electrode distance 1cm with electrode surface area 35 cm2 and optimum electrolysis time of 120 min at optimum applied voltage 12V, stirring speed 250 rpm and pH 9.8. These results proved that the EC process is an appropriate and proficient approach for treating the landfill leachate.

The Study of Phosphorus Removal by Electrocoagulation with Iron-Anodes

2011 ◽  
Vol 183-185 ◽  
pp. 417-421
Author(s):  
Yong Bo Lin ◽  
Yang Yang ◽  
Shuai Wang
Keyword(s):  
Reaction Time ◽  
Total Phosphorus ◽  
Current Density ◽  
Phosphorus Removal ◽  
Removal Rate ◽  
Electrolysis Time ◽  
Optimal Conditions ◽  
Reaction Conditions ◽  
Electrode Distance ◽  
Initial Ph

Determined to adopt iron as anodes, and Ti-base board with coating as cathodes. To optimize the reaction conditions of phosphorus removal by electrocoagulation (EC), testing the effect of current density, electrode distance, initial pH and electrolysis time on the phosphorus removal. According to the results, the optimal conditions for the phosphorus removal in the EC treatment were obtained, i.e., 20 mA/cm2 of current density, 2cm of distance and 10min of reaction time were optimum. Under these conditions, phosphorus removal by electrocoagulation reached to 95.07%, 10min later the change of total phosphorus (TP) removal rate is not obvious. By the end of this test, phosphorus removal by electrocoagulation reached to 99.68%.

scholarly journals Degradation and biodegradability improvement of the landfill leachate using electrocoagulation with iron and aluminum electrodes: A comparative study

2020 ◽  
Vol 15 (2) ◽  
pp. 540-549 ◽  
Author(s):  
M. Bharath ◽  
B. M. Krishna ◽  
B. Manoj Kumar
Keyword(s):  
Comparative Study ◽  
Removal Efficiency ◽  
Landfill Leachate ◽  
Electrode Material ◽  
Operating Conditions ◽  
Iron Electrode ◽  
Aluminum Electrode ◽  
Electrolysis Time ◽  
Electrode Distance ◽  
Aluminum Electrodes

Abstract This present study investigates the comparative study of iron and aluminum electrodes for the treatment of landfill leachate by the Batch Electrocoagulation (EC) technique. The performance of EC was used to determine the removal efficiency of COD and Color. The effects of operating conditions such as electrode material, stirring speed, inter-electrode distance, electrolysis time, initial pH, and applied voltage were studied to evaluate the performance of the electrode. The electrodes were arranged in a monopolar mode by applying different cell voltages of 4, 6, 8, 10 and 12 V for 180 min of electrolysis time (ET) with a varying inter-electrode distance between 1 and 4 cm. The iron and aluminum electrodes can be successfully used as anodes and cathodes for the treatment process, which makes the process more efficient and easier to maintain. Based on the obtained results, it was observed that there was an increase in BOD/COD ratio from 0.11 to 0.79. The maximum removal of COD and Color was found to be 76.5% and 67.2% respectively, accomplished with 105 min optimum electrolysis time with a pH of 9.25 using an iron electrode. In the case of the aluminum electrode, the BOD/COD ratio was increased from 0.11 to 0.66. Over 78.4% of COD and 77.0% of Color removal was obtained with 90 min optimum electrolysis duration and pH 9.3 with an optimum 10 V and an optimum inter-electrode distance of 1 cm. However, the aluminum electrode is superior to iron as a sacrificial electrode material in terms of Color and COD removal efficiency. The aluminum electrode significantly treated landfill leachate by the electrocoagulation method under optimum experimental conditions.

scholarly journals Electrocoagulation Treatment for Removal of Color and Chemical Oxygen Demand in Landfill Leachate using Aluminum Electrode

2019 ◽  
Vol 8 (4) ◽  
pp. 89-92
Keyword(s):  
Chemical Oxygen Demand ◽  
Landfill Leachate ◽  
Applied Voltage ◽  
Research Work ◽  
Oxygen Demand ◽  
Experimental Result ◽  
Aluminum Electrode ◽  
Electrolysis Time ◽  
Leachate Treatment ◽  
Electrode Distance

The present research work mainly deals with the removal percentage of Color and Chemical Oxygen Demand (COD) on landfill leachate by using electrocoagulation (EC) process. An EC process was carried out with an aluminium electrode and it act as both anode and cathode. The study mainly targets the factors affecting on electrode material, electrolysis time, initial pH, applied voltage, inter-electrode distance. The experimental result reveals that there was raise in BOD/COD ratio from 0.11 to 0.66 and the maximum percentage removal achieved were COD and Color 78.4% and 77.0% respectively. The optimum inter-electrode distance 1cm with electrode surface area 35 cm2 and optimum electrolysis time of 90 min at optimum applied voltage 10V, stirring speed 250 rpm and pH is 9.3. These results showed that the EC process is appropriate and well-organized approach for the landfill leachate treatment.

Investigation on the Removal of Chromium from Wastewater using Electrocoagulation

2018 ◽  
Vol 16 (5) ◽  
Author(s):  
K. Thirugnanasambandham ◽  
K. Shine
Keyword(s):  
Energy Consumption ◽  
Optimum Condition ◽  
Process Parameters ◽  
Electrical Energy ◽  
Chromium Removal ◽  
Electrolysis Time ◽  
Electrical Energy Consumption ◽  
Electrode Distance ◽  
Initial Ph ◽  
Electrocoagulation Process

Abstract Nowadays, treatment of chromium wastewater is very critical also important. The current study investigates the influence of electrocoagulation process parameters to reduce the chromium from wastewater. It has been observed that the initial pH (6), current density (25 mA/cm2), electrode distance (4 cm) and electrolysis time (30 min) were found to be optimum for a 97 % chromium removal. For the above said optimum condition, the electrical energy consumption was found to be 0.12 kWh/m3. A comparison between BBD and ANN shows high correlation coefficient values (R2 (ANN) > 0.90 and R2 (RSM) > 0.90). Results indicated that electrocoagulation process is a cheap and effective method to treat chromium wastewater.

scholarly journals Phenolic wastewater remediation employing nano zerovalent iron as a granular third electrode in an electrochemical reactor

2020 ◽  
Author(s):  
Shaimaa T Kadhum ◽  
Ghayda Y Alkindi ◽  
Talib M Albayati
Keyword(s):  
Current Density ◽  
Electrochemical Reactor ◽  
Electrode System ◽  
Zerovalent Iron ◽  
Electrolysis Time ◽  
Optimum Conditions ◽  
Electrode Distance ◽  
Nano Zerovalent Iron ◽  
Phenolic Wastewater ◽  
Maximum Removal

Abstract The rise in toxic industrial and domestic wastewater due to urbanization makes it necessary to pursue new, alternative routes for the removal of refractory pollutants. In this study, both unsupported nano zerovalent iron (NZVI) and silty clay-supported nano zerovalent iron (SC-NZVI) were employed as a granular third electrode (3-D) in an electrochemical reactor. The electrochemical system with two aluminum electrodes as anode and cathode was performed as a granular third electrode treatment process to degrade aqueous phenol. The maximum removal rate of phenol using the tow electrodes electrochemical process (2-D) was 82%. The optimum conditions in a 2-D electrode were as follows: pH = 4, electrolysis time = 30 min, current density = 50 mA/cm2, electrode distance = 4 cm, and phenol concentration = 0.5 g/L. It was concluded that the 3-D electrode system exhibited high efficiency in removing phenolic wastewater in a third electrode system. The optimum conditions were as follows: pH = 2, electrolysis time = 30 min, current density = 50 mA/cm2, electrode distance = 4 cm, and phenol concentration = 0.5 g/L. The maximum removal efficiencies of phenol in the presence of a 3-D electrode with doses of NZVI = 1 g/L or SC-NZVI = 1.25 g/L were 96.1 and 97.8%, respectively.

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