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  • Volume 12, Issue 3

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

Seyed Ahmad Mirbagheri, Sima Malekmohamadi, Sheida Sohrabi Nasrabadi
Published August 2017, 12 (3) 576-588; DOI: 10.2166/wpt.2017.063
Seyed Ahmad Mirbagheri
Department of Environmental Engineering, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran
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Sima Malekmohamadi
Department of Environmental Engineering, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, IranCorresponding author. E-mail: simamalekmohammadi@yahoo.com
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Sheida Sohrabi Nasrabadi
Department of Environmental Engineering, Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran
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Abstract

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.

  • accelerator
  • clarifier
  • pulsator
  • turbidity removal
  • water treatment plant
  • © IWA Publishing 2017
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Water Practice and Technology: 13 (1)
  Volume 12, Issue 3

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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
Seyed Ahmad Mirbagheri, Sima Malekmohamadi, Sheida Sohrabi Nasrabadi
Water Practice and Technology Aug 2017, 12 (3) 576-588; DOI: 10.2166/wpt.2017.063
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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
Seyed Ahmad Mirbagheri, Sima Malekmohamadi, Sheida Sohrabi Nasrabadi
Water Practice and Technology Aug 2017, 12 (3) 576-588; DOI: 10.2166/wpt.2017.063

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  • Article
    • Abstract
    • INTRODUCTION
    • RESEARCH METHODOLOGY
    • EXPERIMENTAL RESULTS FOR THE DESIGNED PILOT
    • STUDYING THE COAGULATION AND FLOCCULATION PROCESS IN WATER TREATMENT PLANTS IN TEHRAN
    • RESULTS
    • SUGGESTIONS
    • REFERENCES
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Keywords

accelerator
clarifier
pulsator
turbidity removal
water treatment plant
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