A certain municipality is planning to construct a new water treatment plant. The average water requirement...

A certain municipality is planning to construct a new water treatment plant. The average water requirement is equivalent to 123456 m3 /d). The peak flow rate is twice the average flow rate. A jar test experiment revealed the following results: Alum dose: 15 mg/L Temperature: 20 o C Coagulation: G = 850 s-1 , t = 40 s Flocculation: GT =123456 . Settling: t = 1.5 h.

a) Determine the size of the coagulation tank (L=2W, W=D) and flocculation tank (L=4W, D=W). Note that if the depth is more than 3 m, you need to use multiple tanks.

b) What power is needed for the coagulation and flocculation units? [2 marks]

c) What would be the volume of Alum storage to serve one month requirements? [Assume density of alum is 1.5 g/cm3 ]

d) Determine the diameter and depth of the circular settling tank. Note that if the dimeter is more than 40 m, multiple tanks should be used.

Expert Solution

Ally Wells answered 1 year ago

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