Numerical Analysis of Petroleum Refinery Wastewater Treatment Using Electro-Fenton Process

2015 ◽  
Vol 10 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Reza Davarnejad ◽  
Masoud Pirhadi ◽  
Mohsen Mohammadi ◽  
Shahrzad Arpanahzadeh
Keyword(s):  
Experimental Data ◽  
Reaction Time ◽  
Current Density ◽  
Petroleum Refinery ◽  
Simulated Data ◽  
Cod Removal ◽  
Molar Ratio ◽  
Fenton Process ◽  
Refinery Wastewater ◽  
Petroleum Refinery Wastewater

Abstract The important parameters in mineralization treatment of petroleum refinery wastewater by electro-Fenton process were successfully simulated by Computational Fluid Dynamics (CFD). The effects of H2O2/PRW (ratio of mole of H2O2 per petroleum refinery wastewater volume), H2O2/Fe2+ molar ratio, current density, pH and reaction time were numerically investigated. Materials distribution in the electrochemical cell was studied and CFD results demonstrated that distance between electrodes had no significant effect on the Chemical oxygen demand (COD) removal. Furthermore, the results were compared with the experimental data. The simulated data showed that maximum COD removal was around 82.55% at H2O2/PRW of 0.04, H2O2/Fe2+ molar ratio of 2.75, pH of 3.5, current density of 52.5 mA/cm2 and reaction time of 90 min while the experimental data obtained from the literature showed maximum COD removal of 77% in the same operating conditions. The simulated data showed a good agreement with the experimental ones.

Simulation of landfill leachate treatment using electro-Fenton technique

2013 ◽  
Vol 69 (2) ◽  
pp. 343-349 ◽  
Author(s):  
Reza Davarnejad ◽  
Mostafa Keshavarz Moraveji ◽  
Masoud Pirhadi ◽  
Mohsen Mohammadi
Keyword(s):  
Experimental Data ◽  
Reaction Time ◽  
Current Density ◽  
Oxygen Demand ◽  
Simulated Data ◽  
Cod Removal ◽  
Molar Ratio ◽  
Fenton Process ◽  
Leachate Treatment ◽  
Computational Fluid Dynamics Cfd

The operating parameters in the electro-Fenton process were simulated using computational fluid dynamics (CFD). The effects of H2O2/Fe2+ molar ratio, current density, pH and reaction time were numerically investigated. The results were compared with the experimental data. The simulated data showed that maximum chemical oxygen demand (COD) removal was around 91.52% at pH of 3.27, H2O2/Fe2+ molar ratio of 1.16, current density of 59.29 mA/cm2 and reaction time of 41.7 min while the experimental data obtained from the literature showed a maximum COD removal (94.7%) at pH of 3, H2O2/Fe2+ molar ratio of 1, current density of 49 mA/cm2 and reaction time of 43 min.

scholarly journals Investigating the Result of Current Density, Temperature, and Electrolyte Concentration on COD: Subtraction of Petroleum Refinery Wastewater Using Response Surface Methodology

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 835
Author(s):  
Sharon Chakawa ◽  
Mujahid Aziz
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Removal Efficiency ◽  
Current Density ◽  
Petroleum Refinery ◽  
Cod Removal ◽  
Refinery Wastewater ◽  
Cod Removal Efficiency ◽  
Petroleum Refinery Wastewater ◽  
Nacl Concentration

Electrochemical oxidation (EO) investigated chemical oxygen demand (COD) subtraction from petroleum refinery wastewater (PRW) as a capable remediation process. Titanium substrates coated with iridium–tantalum oxide mixtures (Ti/IrO2–Ta2O5) were used as the dimensional stable anode (DSA). The Box-Behnken Design (BBD), a statistical experimental design and response surface methodology (RSM), was used to matrix the current density, temperature, and electrolyte (NaCl) concentration variables, with COD removal efficiency as the response factor. A second-order verifiable relationship between the response and independent variables was derived where the analysis of variance displayed a high coefficient of determination value (R2 = 0.9799). The predicted values calculated with the model equations were very close to the experimental values where the model was highly significant. Based on the BBD for current density, the optimum process conditions, temperature and electrolyte (NaCl) concentration were 7.5 mA/cm2, 42 °C and 4.5 g/L, respectively. They were resulting in a COD removal efficiency of 99.83% after a 12-hour EO period.

scholarly journals Assessing the performance of a UV/H2O2 process for removing TOC from petroleum refinery wastewater and the respirometric effects of adding UV/H2O2 treated wastewater to activated sludge from the refinery WWTP biological treatment process

2021 ◽  
Author(s):  
Mark Knight
Keyword(s):  
Activated Sludge ◽  
Biological Treatment ◽  
Treatment Process ◽  
Petroleum Refinery ◽  
Molar Ratio ◽  
Refinery Wastewater ◽  
Bench Scale ◽  
Treatment Performance ◽  
Petroleum Refinery Wastewater ◽  
Biological Treatment Process

The treatment of petroleum refinery wastewater was studied using a bench scale ultraviolet/hydrogen peroxide (UV/H2O2) process. The highest treatment performance of the bench scale UV/H2O2 process to reduce the total organic carbon (TOC) from the petroleum refinery wastewater took place at a reaction time of 45 min and a pH of 5.0. A three factor analysis of va riance (ANOVA) analysis verified that the initial H2O2/TOC molar ratio did not have a significant effect on the bench scale UV/H2O2 process treatment performance. The effects of adding UV/H2O2 treated petroleum refinery wastewater to activated sludge microorganisms form the refinery WWTP biological treatment process was studied using respirometry. Overall, the UV/H2O2 treated refinery wastewater inhibited the refinery activated sludge microorganisms. This occurred when the raw refinery wastewater was treated with a UV/H2O2 process for 45 min. with an initial H2O2/TOC molar ratio of 1.7 mol H2O2/mol C, an initial H2O2 concentration of 202 mg H2O2/L and a pH of either 5 or 7.

Edible Plant Oil Wastewater Treatment Using Electro-Fenton Technique: Experiment and Correlation

2018 ◽  
Vol 16 (8) ◽  
Author(s):  
Reza Davarnejad ◽  
Seyed Amir Mohajerani
Keyword(s):  
Reaction Time ◽  
Current Density ◽  
Oxygen Demand ◽  
Volume Ratio ◽  
Cod Removal ◽  
Interactive Effects ◽  
Molar Ratio ◽  
Plant Oil ◽  
Edible Plant ◽  
High Chemical Oxygen Demand

Abstract The edible plant oil production factories consume high amounts of water and contaminate the water resources. This type of wastewater consists of high chemical oxygen demand (COD) which should properly be treated by an efficient technique. Furthermore, it is containing some chemicals obtained from several sources such as H3PO4 (from hydration section), NaOH (from neutralization section) and citric acid (from nickel removal section). The conventional techniques cannot efficiently treat it which is full of COD. Therefore, the electro-Fenton process as a rapid, compact and efficient one has been encouraged to be applied. For this purpose, 47 experiments were designed and carried out using iron electrodes to evaluate the effects of five significant independent variables such as reaction time (min), pH, current density (mA/cm2), volume ratio of H2O2/wastewater (ml/l) and H2O2/Fe2+ molar ratio on the COD removal. Response surface methodology (RSM) was employed to assess individual and interactive effects of the parameters. The optimum conditions were experimentally obtained at reaction time of 87.33 min, pH of 3.03, current density of 57 mA/cm2, H2O2/wastewater volume ratio of 2.13 ml/l and H2O2/Fe2+ molar ratio of 3.61 for COD removal of 62.94 %.

scholarly journals Mineralization of Hazardous Waste Landfill Leachate using Photo-Fenton Process

2018 ◽  
Vol 65 ◽  
pp. 05012 ◽  
Author(s):  
Pradeep Kumar Singa ◽  
Mohamed Hasnain Isa ◽  
Yeek-Chia Ho ◽  
Jun-Wei Lim
Keyword(s):  
Reaction Time ◽  
Operating Conditions ◽  
Cod Removal ◽  
Molar Ratio ◽  
Optimum Operating ◽  
Fenton Process ◽  
Batch Mode ◽  
Fenton Reagents ◽  
Uv Lamp ◽  
Fenton Oxidation Process

This study was conducted to evaluate the COD removal efficiency of Photo-Fenton oxidation process. The reagents used in the Photo-Fenton process are catalyst Fe2+ and H2O2 as oxidizing agent. A 16W UV lamp was used to carry out the experiments. All the experiments were performed in batch mode to investigate the influence of operating conditions viz., Fenton reagents dosage, molar ratio and reaction time. The maximum COD removal observed was 68% under optimum operating conditions. The operating conditions H2O2/Fe2+ molar ratio = 3 and reaction time = 90 minutes were found to optimum. The dosages of Fenton reagents i.e. hydrogen peroxide and Fe2+ were optimum at 0.09 mol/L and 0.03 mol/L respectively.

scholarly journals Removal of COD from petroleum refinery wastewater using electrocoagulation method

2021 ◽  
Vol 877 (1) ◽  
pp. 012046
Author(s):  
Amal H. Khalil ◽  
Mohammed A. Naji ◽  
Salam M. Naser
Keyword(s):  
Current Density ◽  
Petroleum Refinery ◽  
Oxygen Demand ◽  
Refinery Wastewater ◽  
Duration Of Treatment ◽  
Petroleum Refinery Wastewater ◽  
Short Processing Time ◽  
Percentage Removal ◽  
The Impact ◽  
A Current

Abstract This research assessed the removability of chemical oxygen demand (COD) from petroleum effluent using aluminum-based electrocoagulation reactor. A series of batch flow studies have been conducted to evaluate the impact of current density, electrodes separation, and duration of treatment on the removal of COD from the refinery effluent. The COD levels were determined employing the remaining concentrations using spectrophotometer namely Hach-Lang and standard cuvette test (LCC 514, LCK 314, or APC 400). The findings of the current investigation indicate the capacity of the electrocoagulation technique in a relatively short processing time to reduce the COD levels. The greatest efficiency in removing COD has been determined to be 80.0%. After 100 minutes of electrolysis, a current density of 8 mA/cm2 and electrodes separation of 20 mm achieved the highest percentage removal.

scholarly journals Assessing the performance of a UV/H2O2 process for removing TOC from petroleum refinery wastewater and the respirometric effects of adding UV/H2O2 treated wastewater to activated sludge from the refinery WWTP biological treatment process

2021 ◽  
Author(s):  
Mark Knight
Keyword(s):  
Activated Sludge ◽  
Biological Treatment ◽  
Treatment Process ◽  
Petroleum Refinery ◽  
Molar Ratio ◽  
Refinery Wastewater ◽  
Bench Scale ◽  
Treatment Performance ◽  
Petroleum Refinery Wastewater ◽  
Biological Treatment Process

The treatment of petroleum refinery wastewater was studied using a bench scale ultraviolet/hydrogen peroxide (UV/H2O2) process. The highest treatment performance of the bench scale UV/H2O2 process to reduce the total organic carbon (TOC) from the petroleum refinery wastewater took place at a reaction time of 45 min and a pH of 5.0. A three factor analysis of va riance (ANOVA) analysis verified that the initial H2O2/TOC molar ratio did not have a significant effect on the bench scale UV/H2O2 process treatment performance. The effects of adding UV/H2O2 treated petroleum refinery wastewater to activated sludge microorganisms form the refinery WWTP biological treatment process was studied using respirometry. Overall, the UV/H2O2 treated refinery wastewater inhibited the refinery activated sludge microorganisms. This occurred when the raw refinery wastewater was treated with a UV/H2O2 process for 45 min. with an initial H2O2/TOC molar ratio of 1.7 mol H2O2/mol C, an initial H2O2 concentration of 202 mg H2O2/L and a pH of either 5 or 7.

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