Mousazadeh, Milad and Emamjomeh, Mohammad Mehdi and jamali, hamze ali (2019) Evaluation of the performance of adsorption, electrochemical (ECF), and physical hybrid processes in carwash wastewater treatment. Masters thesis, Qazvin University Of Medical Sciences,Qazvin,Iran.
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Abstract
Background and aim: Treatment of the car wash wastewater (CWW) is important as a potential source of environmental health hazard due to the significant concentrations of contaminants such as detergents, oils-greases, phenol, organic materials. In the current study, chemical oxygen demand (COD), methylene blue active substances (MBAS), and turbidity removal efficiencies were conducted on CWW using adsorption, electrochemical (ECF), and physical hybrid processes. Material and Methods: In this research, the sample was first entered into the ECF reactor, then entered the retention tank after specific times and eventually passed through filtration. According to the standard methods, COD was measured by closed reflux colorimetric method, and turbidity was measured by Nephelometric method. MBAS was also quantified according to the method suggested by Chitikela et al. Experimental design for response surface methodology (RSM) was employed to create two series of 20 experimental runs using monopolar aluminium electrodes. It was optimized using the critical operational parameters such as applied current (1–2A), electrolysis time (30–90 min) and pH (5–9). Results: According to the RSM model, optimum conditions for pH, electrolysis time, and applied current were 7.67, 1.69 amps and 90 min, respectively, in which COD, turbidity and MBAS removal efficiencies were 94.5%, 95%, and 95.2%, respectively. The most predicted efficiency for the COD and turbidity removals were 100%, 96.69%, and 97.9%, respectively. Electric energy consumption and operating costs were found to be 4.2 kWh/m3 and 4206 Rials/m3 (0.056 $/m3), respectively. Conclusion: The hybrid treatment process used in this study seems to be an efficient and cost-effective method compared to existing conventional treatment methods used in removing pollutants from carwash wastewater. Therefore, this method can be used removing pollutants with high concentrations from car wash industry wastewater and in wastewater reclamation. More research is also suggested on other pollutants in carwash wastewater for future studies. Keywords: Carwash wastewater, Adsorption, Electrochemical, Physical, Hybrid treatment.
| Item Type: | Thesis (Masters) |
|---|---|
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering |
| Divisions: | University Thesis > Faculty of Health > Environmental Health |
| Depositing User: | Health School Students |
| Date Deposited: | 21 Sep 2019 07:05 |
| Last Modified: | 21 Sep 2019 07:05 |
| URI: | http://eprints.qums.ac.ir/id/eprint/8964 |
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