Wastewater Treatment of Oil Refineries by Using of UV-Assisted Fenton Process

Subject Areas : Environment Pullotion (water and wastewater)

Hadi  Shayegh ¹ (M.Sc., Chemical Engineering-Process Engineering, Islamic Azad university of Abadan, Abadan, Iran.)
Hamid  Kazemi Esfe ² (Assistant Professor, Chemical Engineering, Islamic Azad University, Mahshahr Unit, Mahshahr, Iran. *(Corresponding Author))
Hossein  Hosseini ³ (Assistant Professor, Department of Chemical Engineering, Islamic Azad University, Abadan Branch, Abadan, Iran.)

Received: 2018-07-28 Accepted : 2019-08-07 Published : 2021-07-23

Keywords: Fenton Process, COD, BOD, Wastewater treatment, Ultra Violet,

Abstract :

Background and Objective: The removal of heavy hydrocarbons and biological wastewater is generally difficult. Finding a suitable way to eliminate or reduce these factors is one of the goals of this research.Materials and Methodology: Although there are special processes for removing or reducing the hydrocarbon and biological load of water, but in industrial wastewater containing hydrocarbon, the evaluation of advanced oxidation processes can reduce not only the burden of the wastewater but also reduce the Biological bad effects. Therefore, in the present study, an experimental study of COD, BOD and O & G reduction using Fenton reaction with ultra-violet irridiation has been investigated.Results: A sample of industrial waste from one of the refineries was prepared. According to the results, the optimal conditions for COD removal was observed as follow: irradiation time 30 minutes, pH‌=‌3, temperature‌=‌35°C, water content‌=‌85 ml of oxygen dissolved in water than 250 ml of wastewater and COD removal was observed up to 45.44%. The optimal conditions for removing O&G were: 23 min, pH‌=‌3, temperature 35°C, dissolved oxygen content of 85 ml, compared to 250 ml of wastewater. Also O&G was eliminated to 89.8%. The optimal conditions for removing BOD were: the irradiation time is 20 minutes, pH‌=‌4, the temperature is 25°C, the soluble oxygen content is 65 ml, compared to 250 ml of the wastewater and the removal of BOD was observed to be 49.82%.Discussion and Conclusion: Laboratory study of COD, BOD and O&G reduction in wastewater was investigated by using Fenton reaction with ultraviolet irridiation. It was found that the Fenton method with ultraviolet irridiation is a suitable method for the removal or reduction of COD, BOD and O&G in refinery wastewater.

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