Physico‐Chemical Processes

The ZVI/HO process was applied for cosmetic wastewater treatment. Two commercial zero-valent iron (ZVI) types with different granulations were chosen: Hepure Ferrox PRB and Hepure Ferrox Target. In addition, the pH and stirring method influence on ZVI/HO process efficiency was studied. During the ZVI and ZVI/HO processes, linear Fe ions concentration increase was observed. The addition of HO significantly accelerated the iron dissolution process. The highest COD removal was obtained using finer ZVI (Hepure Ferrox Target) for doses of reagents ZVI/HO 1500/1600 mg/L, in a HO/COD weight ratio 2:1, at pH 3.0 with stirring on a magnetic stirrer. After 120 min of the process, 84.0% COD removal (from 796 to 127 mg/L) was achieved. It was found that the efficiency of the process depends, as in the case of the Fenton process, on the ratio of the reagents (ZVI/HO) and their dose in relation to the COD (HO/COD) but does not depend on the dose of the iron itself. Statistical analysis confirms that COD removal efficiency depends primarily on HO/COD ratio and ZVI granulation, but ZVI dose influence is not statistically significant. The head space, solid-phase microextraction, gas chromatography, mass spectrometry results confirm high efficiency of the ZVI/HO process.

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A comparison of different pilot constructed clarifiers with the purpose of achieving the optimum condition in turbidity removal at water treatment plants in Tehran

Mirbagheri

Malekmohamadi

Nasrabadi

2017

Water Practice and Technology

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Clarifying is one of the most crucial stages in water treatment at water treatment plants. Determining the type of the clarifier in water treatment plants and using it efficiently is necessary. In this study, a pilot is designed and constructed in which the pulsator, the superpulsator and the accelerator are simulated. For each system, turbidity removal efficiency for different influent turbidities and flow rates were studied and the optimum condition was obtained. The results showed that the superpulsator has a superior performance compared to the pulsator, and the pulsator has a superior performance compared to the accelerator and these differences are more sensible at higher flow rates. Also, the best condition for achieving the highest efficiency for the pulsator and the superpulsator is determined to be at flow rate 3 lit/min for an initial turbidity of 2,500 NTU with alum as the coagulant and the highest efficiency for the accelerator is determined to be at flow rate 3 lit/min for an initial turbidity of 2,500 NTU with ferric chloride as the coagulant. Comparing the turbidity removal efficiency shows that for 67% of the cases, ferric chloride has a better performance as the coagulant compared to alum and increasing the influent turbidity leads to an increase in the removal efficiency. Furthermore, three water treatment plants located in Tehran were studied and their characteristics were compared and suggestions were made to enhance their qualities.

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Physico‐Chemical Processes

Abstract: This review is on the research literature published in 2014 related to the physico‐chemical processes for water and wastewater treatment. The review is divided into six sections, including coagulation/flocculation, filtration, sedimentation, oxidation, flotation, sorption process.

Cited by 3 publications

References 51 publications

Membrane technology for CO2 removal from CO2-rich natural gas

Membrane technology for CO2 removal from CO2-rich natural gas

Cosmetic wastewater treatment by the ZVI/H₂O₂ process

A comparison of different pilot constructed clarifiers with the purpose of achieving the optimum condition in turbidity removal at water treatment plants in Tehran

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Physico‐Chemical Processes

Abstract: This review is on the research literature published in 2014 related to the physico‐chemical processes for water and wastewater treatment. The review is divided into six sections, including coagulation/flocculation, filtration, sedimentation, oxidation, flotation, sorption process.

Cited by 3 publications

References 51 publications

Membrane technology for CO2 removal from CO2-rich natural gas

Membrane technology for CO2 removal from CO2-rich natural gas

Cosmetic wastewater treatment by the ZVI/H2O2 process

A comparison of different pilot constructed clarifiers with the purpose of achieving the optimum condition in turbidity removal at water treatment plants in Tehran

Contact Info

Product

Resources

About

Cosmetic wastewater treatment by the ZVI/H₂O₂ process