OPTIMIZATION OF THE ELECTRO-FENTON PROCESS FOR COD REDUCTION FROM REFINERY WASTEWATER

2020 ◽  
Vol 19 (11) ◽  
pp. 2029-2037
Author(s):  
Ammar S. Abbas ◽  
Zainab I. Abbas
Keyword(s):  
Fenton Process ◽  
Refinery Wastewater ◽  
Cod Reduction

The use of steel slags in the heterogeneous Fenton process for decreasing the chemical oxygen demand of oil refinery wastewater

2018 ◽  
Vol 78 (5) ◽  
pp. 1159-1167 ◽  
Author(s):  
Behnam Heidari ◽  
Mohsen Soleimani ◽  
Nourollah Mirghaffari
Keyword(s):  
Microwave Irradiation ◽  
Chemical Oxygen Demand ◽  
Steel Slag ◽  
Oxygen Demand ◽  
Oil Refinery ◽  
Fenton Process ◽  
Refinery Wastewater ◽  
Optimum Conditions ◽  
Heterogeneous Fenton ◽  
Oil Refinery Wastewater

Abstract The Fenton process is a useful and inexpensive type of advanced oxidation process for industrial wastewater treatment. This study was performed with the aim of using the steel slag as a catalyst in the heterogeneous Fenton process in order to reduce the chemical oxygen demand (COD) of oil refinery wastewater. The effects of various parameters including the reaction time (0.5, 1.0, 2.0, 3.0 and 4.0 h), pH (2.0, 3.0, 4.0, 5.0, 6.0 and 7.0), the concentration of steel slag (12.5, 25.0 and 37.5 g/L), and H2O2 concentration (100, 250, 400 and 500 mg/L) on the Fenton process were investigated. Furthermore, the effect of microwave irradiation on the process efficiency was studied by considering the optimum conditions of the mentioned parameters. The results showed that using 25.0 g/L of steel slag and 250 mg/L H2O2, at pH = 3.0, could reduce COD by up to 64% after 2.0 h. Also, microwave irradiation decreased the time of the process from 120 min to 25 min in the optimum conditions, but it consumed a high amount of energy. It could be concluded that steel slags had a high potential in the treatment of oil refinery wastewater through the Fenton process.

scholarly journals Combined Chemical-Biological Treatment of Effluents from Soil Remediation Processes by Surfactants Solutions Flushing

2012 ◽  
Vol 19 (1) ◽  
pp. 9-18 ◽  
Author(s):  
Elżbieta Hallmann ◽  
Renata Tomczak-Wandzel ◽  
Krystyna Mędrzycka
Keyword(s):  
Wastewater Treatment ◽  
Soil Remediation ◽  
Biological Treatment ◽  
Aerobic Degradation ◽  
Fenton Process ◽  
Cod Reduction ◽  
Treatment Processes ◽  
Oil In Water ◽  
Wastewater Samples ◽  
Surfactant Removal

Combined Chemical-Biological Treatment of Effluents from Soil Remediation Processes by Surfactants Solutions Flushing In recent years combined chemical-biological wastewater treatment processes have received increasing interest. In the present study wastewater from soil remediation processes were treated by means of 1-step processes like Fenton, aerobic degradation and 2-steps combined method. The effluents resulting from soil remediation processes consist of high surfactant concentration solutions, mobilized oils and oil-in-water (o/w) emulsions. The effectiveness of wastewater treatment was evaluated by COD reduction and surfactant removal. The application of Fenton process alone showed around 80% of COD and surfactant removal, and in case of aerobic process only 60% of COD and 50% of surfactant removal was accomplished. However, the maximum COD reduction and surfactant removal from wastewater samples, above 90%, was obtained in aerobic degradation with Fenton process as pretreatment. Thus, the Fenton process could be effectively applied as a pretreatment step to improve the reduction of both COD and surfactant from wastewater resulting from soil remediation.

scholarly journals COD Removal of Edible Oil Content in Wastewater by Advanced Oxidation Process

2016 ◽  
Vol 6 (2) ◽  
pp. 57 ◽  
Author(s):  
Aola Hussein Flamarz Tahir ◽  
Nagam Obeid Kariem ◽  
Shatha Abduljabbar Ibrahim
Keyword(s):  
Advanced Oxidation Process ◽  
Ph Value ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Cod Reduction ◽  
Chemical Reagents ◽  
Batch System ◽  
Oil Concentration ◽  
Optimum Chemical ◽  
Total Reaction Time

Different Advanced Oxidation Processes (Photo Fenton process, Fenton process and H<sub>2</sub>O<sub>2</sub>/UV) were studied in order to reduce COD from oily compounds aqueous solution using batch system. To get the optimum condition, different variables were studied for each of these processes; such as pH, time, concentration of H<sub>2</sub>O<sub>2</sub>, concentration of oil, concentration of FeSO<sub>4</sub>·7H<sub>2</sub>O and temperature as parameters. It was found that the optimal pH value for the three processes was 3 and the optimal temperature was 30<sup>o</sup>C for Photo-Fenton and UV/H<sub>2</sub>O<sub>2</sub> system and 20<sup>o</sup>C for Fenton process. Photo-Fenton process gave a maximum COD reduction of 80.59 % (COD from 2684 to 521 mg/l), Fenton gave 53.22 % (COD from 2587-1130) and the combination of UV/H<sub>2</sub>O<sub>2</sub> gave a COD reduction of 22.69 % (COD from 2450 to 1894). The percentage of removal found was after the total reaction time (180 min.). The optimum chemical reagents for Photo-Fenton, Fenton and UV/H<sub>2</sub>O<sub>2</sub> were as the following H<sub>2</sub>O<sub>2</sub> = 800 mg/l, 1500 mg/l and 2000 mg/l, Fe<sub>2</sub>SO<sub>4</sub>·7H<sub>2</sub>O = 60 mg/l, 100 mg/l.

scholarly journals Removal of COD from Oil Recovery Industry Wastewater by the Advanced Oxidation Processes(AOP) Based on H2O2

2013 ◽  
Vol 10 (1) ◽  
pp. 31-38 ◽  
Keyword(s):  
Reaction Time ◽  
Oil Recovery ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Fenton Process ◽  
Oil And Grease ◽  
Cod Reduction ◽  
Oxidation Processes ◽  
High Pollution ◽  
Industry Wastewater

The combinations of H2O2/Fe+2, UV/H2O2/Fe+2 and UV/H2O2 process were investigated on treatment of oil recovery industry wastewater. Treatment of oil recovery industry wastewater, a typical high pollution strength industrial wastewater (chemical oxygen deman (COD): 21000 mg l-1, biological oxygen demand (BOD): 8000 mg l-1, oil and grease:1140 mg l-1, total dissolved solids (TDS): 37000 mg l-1, total suspended solids: 2580 mg l-1), was carried out by batch oxidation processes. The optimal mass ratio for H2O2/Fe+2 yielding the highest COD removal was found to be 8.658 corresponding to 200.52 g 1-1 H2O2 and 23.16 g l-1 Fe+2 concentrations for 60 minutes reaction time. Fenton process gave a maximum COD reduction of 86% (from 21000 to 2980 mg l-1) and the combination of UV/H2O2 gave a COD reduction of 39% (from 21000 to 12730). The percentage of removal, after the total reaction time (3.5h), H2O2: 8.4 g l-1 and Fe+2: 0.05g l-1, in the photo Fenton process, corresponded to 81 % of the total initial COD (4200 mg l-1). The oxidative ability of the UV/Fe+2/H2O2 process (81%) was greater than that of the UV/H2O2 process (55%) for 80% diluted wastewater. COD removal efficiency for UV/H2O2 process (COD/H2O2=1/2 (w/w)) was 90%, 55%, and 39 when initial COD was 1050, 4200, and 21000 mg l-1, respectively, whereas COD removal was 943, 2320, and 8270 mg l-1, respectively.

scholarly journals COD Reduction of Anaerobically Digested Distillery Spentwash By Electro-Fenton Process

2019 ◽  
Vol 7 (4) ◽  
pp. 591-594
Author(s):  
V. P. Patil ◽  
M. B. Tantak ◽  
D.S. Nimbalkar ◽  
S. S. Patil
Keyword(s):  
Fenton Process ◽  
Cod Reduction ◽  
Distillery Spentwash

scholarly journals Aromatic Free Fenton Process for Rapid Removal of Phenol from Refinery Wastewater in an Oscillatory Baffled Reactor

2021 ◽  
pp. 103635
Author(s):  
Ahmed A. Hassan ◽  
Saba A. Gheni ◽  
Safaa M.R. Ahmed ◽  
Ghassan H. Abdullah ◽  
Adam Harvey
Keyword(s):  
Fenton Process ◽  
Refinery Wastewater ◽  
Rapid Removal
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