The Performance of Electrocoagulation Process in Removing Organic and Nitrogenous Compounds from Landfill Leachate in a Three-Compartment Reactor

Abstract In this work, landfill leachate treatment by electrocoagulation process with a novel rotating anode reactor was studied. The influence of rotating anode speed on the removal efficiency of chemical oxygen demand (COD), total dissolved solids (TDS), and total suspended solids (TSS) of raw landfill leachate was investigated. The influence of operating parameters like leachate pH, leachate temperature, current, and inter-distance between the cathode rings and anode impellers on the electrocoagulation performance were also investigated. The results revealed the optimum rotating speed is 150 rpm and increasing the rotating speed above this value led to reducing process performance. The leachate electrocoagulation treatment process favors the neutral medium and the treatment performance increases with increasing current intensity. Furthermore, the electrocoagulation treatment performance improves with increasing leachate temperature. However, the performance reduces with increasing inter-electrode distance.

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Antioxidant biomarkers in Gammarus pulex to evaluate the efficiency of electrocoagulation process in landfill leachate treatment

Environmental Science and Pollution Research ◽

10.1007/s11356-018-1491-7 ◽

2018 ◽

Vol 25 (13) ◽

pp. 12538-12544 ◽

Cited By ~ 10

Author(s):

Osman Serdar ◽

Nuran Cikcikoglu Yildirim ◽

Sule Tatar ◽

Numan Yildirim ◽

Aysenur Ogedey

Keyword(s):

Landfill Leachate ◽

Gammarus Pulex ◽

Leachate Treatment ◽

Electrocoagulation Process

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.857.519 ◽

2016 ◽

Vol 857 ◽

pp. 519-523 ◽

Cited By ~ 1

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.

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A continuous clinoptilolite augmented SBR-electrocoagulation process to remove concentrated ammonia and colour in landfill leachate

Environmental Technology & Innovation ◽

10.1016/j.eti.2021.101575 ◽

2021 ◽

pp. 101575

Author(s):

Mohd Azhar Abd Hamid ◽

Hamidi Abdul Aziz ◽

Mohd Suffian Yusoff ◽

Sheikh Abdul Rezan

Keyword(s):

Landfill Leachate ◽

Electrocoagulation Process

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Removing nitrogenous compounds from landfill leachate using electrochemical techniques

Environmental Engineering Research ◽

10.4491/eer.2018.112 ◽

2018 ◽

Vol 24 (2) ◽

pp. 339-346

Author(s):

Nadeeshani Nanayakkara ◽

Asanga Koralage ◽

Charuka Meegoda ◽

Supun Kariyawasam

Keyword(s):

Landfill Leachate ◽

Electrochemical Techniques ◽

Nitrogenous Compounds

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Investigating the Electrocoagulation Treatment of Landfill Leachate by Iron/Graphite Electrodes: Process Parameters and Efficacy Assessment

Water ◽

10.3390/w14020205 ◽

2022 ◽

Vol 14 (2) ◽

pp. 205

Author(s):

Tahereh Rookesh ◽

Mohammad Reza Samaei ◽

Saeed Yousefinejad ◽

Hassan Hashemi ◽

Zahra Derakhshan ◽

...

Keyword(s):

Current Density ◽

Landfill Leachate ◽

Performance Indicators ◽

Oxygen Demand ◽

Cost Effective ◽

Leachate Treatment ◽

Graphite Electrodes ◽

Electrode Distance ◽

Electrocoagulation Process ◽

Efficacy Assessment

Electrocoagulation is a widely used method for treating leachate since it is cost effective and eco-friendly. In the present study, the electrocoagulation process was employed to remove chemical oxygen demand (COD), NH4+, total dissolved solids (TDS), total suspended solids (TSS), turbidity, and color from landfill leachate. At first, lime was used as a pretreatment, then the Fe/Gr and Ti/PbO2/steel electrodes were used, and the optimum electrode was selected. Afterwards, the effects of some variables, including pH, current density, temperature, the inter-electrode distance, and the type of electrolyte were investigated. Results showed that COD, NH4+, TSS, TDS, electrical conductivity (EC), turbidity, color, and pH of effluent pretreatment chemical reached 22,371, 385, 884, 21,820 (mg/L), 13.8 (ms/cm3), 1355 (NTU), 8500 (TCU) and 10, respectively (the removal efficiency was 0, 20.37, 32.4, 61.99, 59.18, and 56.6 percent). With the Fe/Gr electrode, the optimal condition was observed as follows: pH of 7.5, current density of 64 mA/cm2, inter-electrode distance was equal to 1.5 cm, temperature at 20 °C, and retention time 2–4 h. Overall, the electrocoagulation with the Fe/Gr electrode was a suitable technology for landfill leachate treatment due to its effectiveness for the removal of both COD and NH4+, with advantageous performance indicators.

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