【Daily Question】Utilities - Water Supply and Drainage - 20190316
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A water treatment plant has 2 horizontal sedimentation tanks with the same water treatment capacity and floor area; they are used to treat water from reservoirs and rivers respectively. Which of the following statements regarding the characteristics of these two horizontal sedimentation tanks is correct? A. The surface load or settling velocity of the particles in both tanks must be the same. B. The total efficiency of removing particulates from the water in both tanks must be the same. C. The Reynolds number in both tanks must be the same. D. The length-to-width ratio of both tanks must be the same. Answer: A
B. The total removal rate of particulate matter from the water in the 2 ponds must be the same
A. The surface load or settling velocity of the two ponds must be the same