A water treatment plant has four identical rapid sand filters. Each is square in plan and has a capacity of 1.0 MGD. The filtration rate is 4 gpm/ft², and the total wetted depth is 10 ft. a. What should be the cross-section dimension of each filter? b. Each filter is backwashed every day for 5 minutes. The rate of rise of the backwash water is 2 ft/min. What percentage of the plant’s filtered water will be used for backwashing?
A water treatment plant has four identical rapid sand filters. Each is square in plan and has a capacity of 1.0 MGD. The filtration rate is 4 gpm/ft², and the total wetted depth is 10 ft. a. What should be the cross-section dimension of each filter? b. Each filter is backwashed every day for 5 minutes. The rate of rise of the backwash water is 2 ft/min. What percentage of the plant’s filtered water will be used for backwashing?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A water treatment plant has four identical rapid sand filters. Each is square in plan and has a capacity of 1.0 MGD. The filtration rate is 4 gpm/ft², and the total wetted depth is 10 ft.
a. What should be the cross-section dimension of each filter?
b. Each filter is backwashed every day for 5 minutes. The rate of rise of the backwash water is 2 ft/min. What percentage of the plant’s filtered water will be used for backwashing?
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