The design flow for a water treatment plant (WTP) is 7.2 x 103 m³/d. The rapid mixing tank will have a mechanical mixer and the average alum dosage is 50 mg/L. The theoretical mean hydraulic detention time of the tank is 1.5 minutes. Determine the followings: (i). The quantity of alum needed on a daily basis. (ii). The dimensions of the tank in meters for a tank with equal length, width, and depth. (iii). The power input required for a G of 1000 s¹ for a water temperature of 25°C.

The design flow for a water treatment plant (WTP) is 7.2 x 103 m³/d. The rapid mixing tank will have a mechanical mixer and the average alum dosage is 50 mg/L. The theoretical mean hydraulic detention time of the tank is 1.5 minutes. Determine the followings: (i). The quantity of alum needed on a daily basis. (ii). The dimensions of the tank in meters for a tank with equal length, width, and depth. (iii). The power input required for a G of 1000 s¹ for a water temperature of 25°C.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.14P

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