Electro‐oxidation of phenol in petroleum wastewater using a novel pilot‐scale electrochemical cell with graphite and stainless‐steel electrodes

This work investigated the removal of phenol from petroleum wastewater by the electro‐oxidation process. The experimental design was developed on a pilot‐scale electro‐oxidation system equipped with a cylindrical shape of graphite electrodes as an anode and stainless‐steel electrodes as a cathode. A...

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Bibliographic Details
Published inWater and environment journal : WEJ Vol. 35; no. 1; pp. 259 - 268
Main Authors Abou‐Taleb, Enas M., Hellal, Mohamed S., Kamal, Kholod H.
Format Journal Article
LanguageEnglish
Published London Wiley Subscription Services, Inc 01.02.2021
Subjects
anodes
Biochemical oxygen demand
Cathodes
Chemical oxygen demand
Current density
Design of experiments
Economics
Electrochemical cells
Electrochemistry
Electrodes
electro‐oxidation
energy
Energy consumption
environment
Experimental design
graphene
Graphite
graphite electrode
oil refinery
Operating costs
Organic matter
Oxidation
Oxidation process
Petroleum
Petroleum industry wastewaters
phenol
Phenols
Reaction time
Removal
Scale (corrosion)
stainless steel
stainless steel electrode
Steel
Total oxygen demand
Wastewater
water
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Summary:This work investigated the removal of phenol from petroleum wastewater by the electro‐oxidation process. The experimental design was developed on a pilot‐scale electro‐oxidation system equipped with a cylindrical shape of graphite electrodes as an anode and stainless‐steel electrodes as a cathode. An initial study was performed based on operating variables such as current density and time on real petroleum wastewater. The optimum conditions were obtained as a current density of 3 mA/cm2 and time 15 min. Under these applied optimum conditions, complete phenol removal from an initial concentration of about 6.8 mg/L was achieved. Also, 50–60% removal of organic matter in terms of chemical oxygen demand (COD) and biological oxygen demand (BOD). The removal of organic matter using electro‐oxidation requires a long reaction time. Also, the economic study indicated that the energy consumption was determined to be 0.79 kWh/m3 and the operating cost was 0.051 $/m3 which is very economical compared with conventional methods.
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ISSN:1747-6585
1747-6593
DOI:10.1111/wej.12624