scholarly journals TREATMENT OF SERVICE STATION WASTEWATER USING ELECTROCOAGULATION PROCESS

2017 ◽  
Vol 5 (7) ◽  
pp. 348-353
Author(s):  
Krishna M. K ◽  
Manjunath H.N ◽  
Ayesha Siddiqa
Keyword(s):  
Stainless Steel ◽  
Removal Efficiency ◽  
Iron Electrode ◽  
Electrode Spacing ◽  
Electrolysis Time ◽  
Constant Voltage ◽  
Oil And Grease ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Electro Coagulation

The various electrodes such as iron, aluminium, stainless steel and graphite are used in this study. Main objectives of the present paper is to evaluate the removal of COD, pH, TDS and oil and grease from the automobile wastewater by Electro coagulation using iron as Monopolar configuration at different voltages and electrolysis time. To study the effect of inter electrode spacing and effect of different initial pH for the removal of selected parameter at constant voltage for the iron electrode. The removal efficiency decreases with increase in electrode spacing as 71.2% of COD, 96.5% of TDS and 88.76% of oil and grease removal was achieved with iron electrode.

scholarly journals Optimization of parameters of electrocoagulation/flotation process for removal of Acid Red 14 with mesh stainless steel electrodes

2017 ◽  
Vol 8 (2) ◽  
pp. 278-292 ◽  
Author(s):  
M. A. Ahangarnokolaei ◽  
H. Ganjidoust ◽  
B. Ayati
Keyword(s):  
Electrical Conductivity ◽  
Stainless Steel ◽  
Removal Efficiency ◽  
Industrial Wastewater ◽  
Flotation Process ◽  
Simultaneous System ◽  
Solution Type ◽  
Initial Ph ◽  
Flotation Method ◽  
Electro Coagulation

Abstract Dyes are persistent compounds that are not easily biodegraded and are considered as carcinogenic. Electro-coagulation and electro-flotation method, due to its adaptability and compatibility with the environment, is regarded as one of the appropriate methods for the treatment of industrial wastewater containing dye. In this study in which stainless steel mesh electrodes with a horizontal arrangement are used, the most important parameters affecting the performance of the simultaneous system of electro-coagulation and electro-flotation, including electrodes area, of distance between electrodes, electrical conductivity of the solution, type of electrolyte, and initial pH were examined. The effect of every one of these parameters in color removal efficiency of Acid Red 14 from artificial wastewater, energy consumption and anode was determined and their values were optimized. The area of the electrode equals 20.5 cm2, the distance between the electrodes is 0.5 cm, electrical conductivity 3,600 μS/cm, and initial pH 7 were selected as the optimum values, and dye removal efficiency of 99% with initial concentration of 150 mg/L and electric current density 40 mA/cm2 (0.8 A) were obtained under optimum conditions and within 20 minutes. The advantages of this method are low energy and material consumption, and low sludge production.

Removal of Caramel Pigment from Sauce Wastewater by Electrocoagulation Process Using Aluminum Electrodes

2012 ◽  
Vol 260-261 ◽  
pp. 856-861
Author(s):  
Xiao Long Li ◽  
Tao Tao Li ◽  
Feng Qin Zhang
Keyword(s):  
Effective Treatment ◽  
Removal Efficiency ◽  
Electrolysis Time ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes

Electrocoagulation(EC) process is an effective method for the removal caramel from wastewater. In this study, the removal of caramel pigment from sauce wastewater has been studied by EC treatment with aluminum electrodes. The effects of electrolysis time and the initial pH of the sauce wastewater on the removal efficiency of caramel pigment have been investigated. The results indicated that the initial pH of sauce wastewater has a significant effect on the removal efficiency. When the initial pH was kept in the range of 4-8, all aluminum cations produced at the anode formed the insoluble coagulants, leading to a more effective treatment. Flocs formed by the EC process were analyzed by FTIR and the results have been explained.

scholarly journals Batch elimination of cationic dye from aqueous solution by electrocoagulation process

2020 ◽  
Vol 10 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Fatima Ezzahra Titchou ◽  
Hanane Afanga ◽  
Hicham Zazou ◽  
Rachid Ait Akbour ◽  
Mohamed Hamdani
Keyword(s):  
Stainless Steel ◽  
Power Consumption ◽  
Industrial Revolution ◽  
Electrical Power ◽  
Oxygen Demand ◽  
Electrode Spacing ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Electrical Power Consumption ◽  
Steel Electrodes

Like other developing countries, Morocco has undergone a real industrial revolution that generates a huge amount of colored wastewater. Methylene blue (MB) could be considered as commonly model of cationic dyes that are widely used in industries. In the present work, the removal of MB was investigated in the presence of NaCl as electrolyte by electrocoagulation (EC) process. Parameters studied are the nature of electrodes, electrode spacing, initial dye concentration, agitation speed, applied current density, NaCl concentration, and the effect of the initial pH. Stainless steel electrodes have been used as cathode and anode in the electrochemical cell. The performance of the process was evaluated in terms of color removal, chemical oxygen demand (COD), total organic carbon (TOC), electrical power consumption, current efficiency, and the quantity of sludge formed. The results showed that the removal percent of 20 mg/L MB is 100 %, using stainless steel electrodes with an interspace of 1.5 cm and 20 mA/cm² for 6 min in the presence of 0.1 M NaCl at natural pH. COD and TOC removals within 15 min were 45% and 51% respectively. The power consumption, in that case, was 5.84 KWh/m3, while the amount of sludge formed was 1.64 Kg/m3.

Effects of operational parameters on defluoridation efficiency using electrocoagulation process

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
M. Behbahani ◽  
M.R. Alavi Moghaddam ◽  
M. Arami
Keyword(s):  
Reaction Time ◽  
Anode Material ◽  
Removal Efficiency ◽  
Fluoride Concentration ◽  
Fluoride Removal ◽  
Operational Parameters ◽  
Applied Current ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Electrode Connection

The aim of this study is to examine the effect of operational parameters on fluoride removal using electrocoagulation method. For this purpose, various operational parameters including initial pH, initial fluoride concentration, applied current, reaction time, electrode connection mode, anode material, electrolyte salt, electrolyte concentration, number of electrodes and interelectrode distance were investigated. The highest defluoridation efficiency achieved at initial pH 6. In the case of initial fluoride concentration, maximum removal efficiency (98.5%) obtained at concentration of 25mg/l. The increase of applied current and reaction time improved defluoridation efficiency up to 99%. The difference of fluoride removal efficiencies between monopolar and bipolar series and monopolar parallel were significant, especially at reaction time of 5 min. When aluminum used as anode material, higher removal efficiency (98.5%) achieved compared to that of iron anode (67.7%). The best electrolyte salt was NaCl with the maximum defluoridation efficiency of 98.5% compared to KNO3 and Na2SO4. The increase of NaCl had no effect on defluoridation efficiency. Number of electrodes had little effect on the amounts of Al3+ ions released in the solution and as a result defluoridation efficiency. Almost the same fluoride removal efficiency obtained for different interelectrode distances.

scholarly journals Optimization of electrocoagulation of instant coffee production wastewater using the response surface methodology

2017 ◽  
Vol 19 (2) ◽  
pp. 67-71 ◽  
Author(s):  
Ha Manh Bui
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Removal Efficiency ◽  
Current Density ◽  
Cod Removal ◽  
Coefficient Of Determination ◽  
Electrolysis Time ◽  
Instant Coffee ◽  
Operating Variables ◽  
Initial Ph

Abstract The COD removal efficiency from an instant coffee processing wastewater using electrocoagulation was investigated. For this purpose, the response surface methodology was employed, using central composing design to optimize three of the most important operating variables, i.e., electrolysis time, current density and initial pH. The results based upon statistical analysis showed that the quadratic models for COD removal were significant at very low probability value (<0.0001) and high coefficient of determination (R2 = 0.9621) value. The statistical results also indicated that all the three variables and the interaction between initial pH and electrolysis time were significant on COD abatement. The maximum predicted COD removal using the response function reached 93.3% with electrolysis time of 10 min, current density of 108.3 A/m2 and initial pH of 7.0, respectively. The removal efficiency value was agreed well with the experimental value of COD removal (90.4%) under the optimum conditions.

scholarly journals Techno-economical evaluation of nitrate removal using continuous flow electro-coagulation process: optimization by Taguchi model

2017 ◽  
Vol 17 (6) ◽  
pp. 1703-1711 ◽  
Author(s):  
E. Karamati Niaragh ◽  
M. R. Alavi Moghaddam ◽  
M. M. Emamjomeh
Keyword(s):  
Removal Efficiency ◽  
Flow Rate ◽  
Current Density ◽  
Nitrate Concentration ◽  
Nitrate Removal ◽  
Operating Costs ◽  
Inlet Flow ◽  
Inlet Flow Rate ◽  
Initial Ph ◽  
Electro Coagulation

Abstract This study aims to investigate the effect of the main parameters on the performance of a continuous flow electro-coagulation (EC) process for nitrate removal efficiency and its operating costs. For this purpose, the Taguchi experimental design with orthogonal array L27 (313) was applied to analyze the effects of selected parameters, namely initial nitrate concentration, inlet flow rate, current density and initial pH. According to the analysis of variance results, the inlet flow rate and the current density were recognized to be the most effective factors playing a pivotal role in nitrate removal efficiency by using an EC process. The optimum conditions of initial nitrate concentration, inlet flow rate, current density and initial pH were found to be 100 mg/L, 50 mL/min, 80 A/m2 and 8, respectively. As a result, the observed nitrate removal efficiency under these conditions was 61.70%. In addition, operating costs were evaluated as 1.278 US$/g NO3-removed. Finally, a high correlation was observed between the experimental and predicted results indicating an appropriate accuracy of the Taguchi model for nitrate removal efficiency and its operating costs in an EC system.

scholarly journals Evaluating Electrocoagulation Process for Water Treatment Efficiency Using Response Surface Methodology

2020 ◽  
Vol 26 (9) ◽  
pp. 11-23
Author(s):  
Rand Shakir Mahmood ◽  
Nawar O.A. Al-Musawi
Keyword(s):  
Response Surface Methodology ◽  
Water Treatment ◽  
Response Surface ◽  
Removal Efficiency ◽  
Correction Factor ◽  
Suspended Solids ◽  
Operating Time ◽  
Electrode Spacing ◽  
Parallel Plates ◽  
Electrocoagulation Process

The electrocoagulation process became one of the most important technologies used for water treatment processes in the last few years. It’s the preferred method to remove suspended solids and heavy metals from water for treating drinking water and wastewater from textile, diary, and electroplating factories. This research aims to study the effect of using the electrocoagulation process with aluminum electrodes on the removal efficiency of suspended solids and turbidity presented in raw water and optimizing by the response surface methodology (RSM). The most important variables studied in this research included electrode spacing, the applied voltage, and the operating time of the electrocoagulation process. The samples were taken from the Al Qadisiyiah water treatment plant. The treatment set up was in a batch mode; two parallel plates of aluminum were used as electrodes. Experimental results showed that the maximum removal efficiency of 96% for turbidity and 97% for TSS were obtained at operating time 60 minutes, voltage 30 V, and electrode spacing 1.7cm. Two models for predicting removal efficiency obtained, the first model was for turbidity with a correction factor of 94.7%, and the second one was for the TSS with a correction factor of 94.85%.

scholarly journals Removal of Cadmium from Industrial Wastewater using Electrocoagulation Process

2019 ◽  
Vol 26 (1) ◽  
pp. 24-34 ◽  
Author(s):  
Mohammed Alameen Salem ◽  
Najwa Majeed
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Applied Voltage ◽  
Industrial Wastewater ◽  
Batch Reactor ◽  
Operating Parameters ◽  
Initial Concentration ◽  
Initial Ph ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes

Cadmium is one of the heavy metal found in the wastewater of many industries. The electrocoagulation offers many advantages for the removal of cadmium over other methods. So the removal of cadmium from wastewater by using electrocoagulation was studied to investigate the effect of operating parameters on the removal efficiency. The studied parameters were the initial pH, initial concentration, and applied voltage. The study experiments were conducted in a batch reactor with  with two pairs of aluminum electrodes with dimension  and 2mm in thick with 1.5 cm space between them. The optimum removal was obtained at pH =7, initial concentration = 50 mg/L, and applied voltage = 20 V and it was 90%.

Removal of Cadmium and Zinc Contaminations in Landfill Leachate by Using Electrocoagulation Process

2016 ◽  
Vol 857 ◽  
pp. 519-523 ◽  
Author(s):  
Mohamad Fared Murshed ◽  
Mohd Khairul Nizam Mahmad ◽  
M.A.Z. Mohd Remy Rozainy ◽  
Ismail Abustan ◽  
Norlia Baharun
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Stainless Steel ◽  
Electrolyte Solution ◽  
Landfill Leachate ◽  
Metal Removal ◽  
Stainless Steel Electrode ◽  
Steel Electrode ◽  
Initial Ph ◽  
Electrocoagulation Process

The research works involve the study of removal of cadmium and zinc contaminations in landfill leachate by electrocoagulation process. This project focused on leachate landfill from Pulau Burung, Nibong Tebal, Penang as an electrolyte solution. Heavy metals are the main factor contributing to pollution in leachate landfill. Types of electrodes used in this study were aluminium (grade 5052) and Stainless Steel (grade 316). The ranges of initial pH applied were pH (3, 4, 5, 6 and 7) and voltages applied were 1.5V, 2.0V and 2.5V. At the end of electrocoagulation process, the solutions were stored and analysed usingatomic absorption spectroscopy (AAS) to determine the final concentration of electrolyte solution. It was found difference electrodes have difference effectiveness in removing heavy metals, relies on the types of electrodes (aluminium or stainless steel) and also types of heavy metals that were being treated. The initial pH also gives the significant effect to removal of heavy metal and the maximum voltages give higher removal of heavy metal. Removal of cadmium and zinc by stainless steel electrode was more effective than aluminium electrodes at voltage of 2.5V. The removal using stainless steel was 22.45% and 97.54% respectively. For removal using aluminium electrodes 18.37% and 92.12% respectively. It was found that the maximum voltages give higher removal of heavy metal for all removal of cadmium and zinc. The removal maximum when the applied voltage was 2.5V and minimum at 1.5V.

scholarly journals Decolorization of Reactive Red 195 solution by electrocoagulation process

2014 ◽  
Vol 5 (1) ◽  
pp. 22-26
Author(s):  
Yuan-Shing Perng ◽  
Ha Manh Bui
Keyword(s):  
Electric Current ◽  
Reactive Dye ◽  
Sodium Sulphate ◽  
Color Removal ◽  
Iron Electrode ◽  
Electrolysis Time ◽  
Operational Parameters ◽  
Sulphate Concentration ◽  
Electrocoagulation Process ◽  
Reactive Red 195

In this study, the application of bipolar electrocoagulation (EC) with iron electrode has been assessed for color removal of simulated wastewater containing Reactive Red 195. The influence of initial pH, sodium sulphate concentration, initial dye concentration, electrolysis time, and electric current were examined. The optimum operational parameters were found to be pH =11, concentration of dye = 50 mg L-1, sodium sulphate concentration = 1200 mg L-1, electrolysis time = 5 min, and electric current = 4 A. In such condition, color removal efficiency achieved over 99%. This result indicates that EC can be used as an efficient and “green” method for color removal from reactive dye solution. Trong nghiên cứu này, quá trình khử màu nhuộm hoạt tính (Reactive Red 195) được khảo sát bằng hệ thống keo tụ điện hóa điện cực kép, với vật liệu sắt. Các yếu tố ảnh hưởng đến quá trình khử màu như pH, nồng độ màu nhuộm, nồng độ muối Na2SO4, thời gian phản ứng và cường độ dòng được lựa chọn nghiên cứu. Kết quả cho thấy hệ thống điện hóa trên loại gần như hoàn toàn màu nhuộm với hiệu suất đạt trên 99 % tại pH 11, nồng độ màu 50 mgL-1 và nống độ muối Na2SO4 1200 mgL-1 trong khoảng thời gian 5phút. Kết quả trên cho thấy keo tụ điện hóa có thể xem là một phương pháp xử lý hiệu quả và “xanh” trong việc loại bỏ hoàn toàn màu từ nước thải nhuộm hoạt tính.

Sign in / Sign up

Export Citation Format

Share Document