Journal of Wetland Ecobiology
Volume 16, Issue 1 (Spring 2024)
2024, 16(1): 49-58 |
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Comparison of Electrochemical and Chemical Coagulation Processes in Petrochemical Wastewater Treatment. Wetland Ecobiology 2024; 16 (1) : 5
URL: http://jweb.ahvaz.iau.ir/article-1-1099-en.html
URL: http://jweb.ahvaz.iau.ir/article-1-1099-en.html
Abstract: (263 Views)
The increasing production of industrial wastewater with high organic and metallic loads, particularly in the petrochemical industry, poses a serious challenge to the environment and conventional treatment systems. Traditional chemical methods like chemical coagulation (CC) and flocculation, although technically simple, suffer from issues such as high chemical consumption, excessive sludge production, and low efficiency in removing refractory pollutants. Therefore, the development and comparison of newer technologies, such as electrochemical processes (Electrocoagulation, EC), as efficient and sustainable alternatives, are essential. This research, conducted in 2024 (1403), aimed to compare the performance of two processes: Chemical Coagulation (CC) and Electrocoagulation (EC) in treating petrochemical wastewater. The wastewater samples were collected from the treatment plant effluent and analyzed and optimized using the Response Surface Methodology (RSM) and Design Expert 11.1 software. In the Chemical Coagulation process, optimal conditions were achieved at pH=5.7 and a coagulant concentration of 500 mg/L, which resulted in a Chemical Oxygen Demand (COD) removal efficiency of 12%. In contrast, in the Electrocoagulation process, using two approaches: "minimizing energy consumption" and "maximizing removal efficiency," the COD removal values obtained were 26.5% and 29%, respectively. The Quadratic model with a coefficient of determination (R^2=0/9655) indicated high predictive accuracy and model fit. The results demonstrate the superiority of the Electrocoagulation process in removing organic compounds and heavy metals, shifting the pH toward neutral, and reducing the need for chemical agents. Accordingly, the EC process can be considered a more efficient and environmentally friendly option for treating industrial and, specifically, petrochemical wastewaters.
Article number: 5
Keywords: Petrochemical Wastewater, Pollution Load, Electrocoagulation, Chemical Coagulation, Environment
Type of Study: Research |
Subject:
Special
Received: 2025/08/26 | Accepted: 2026/01/13 | Published: 2026/01/13
Received: 2025/08/26 | Accepted: 2026/01/13 | Published: 2026/01/13
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