In the continuing design of Eau Gaullie’s rapid sand filter ( Problems 8-10 , 8-11 , and...

In the continuing design of Eau Gaullie’s rapid sand filter ( Problems 8-10 , 8-11 , and 8-16 ), determine the area of each filter cell and the plan dimensions of a filter box. Assume a gullet width of 0.5 m.

Problems 8-10

The rapid sand filter being designed for Eau Gaullie has the characteristics and sieve analysis shown below. Using the Rose equation, determine the headloss for the clean filter bed in a stratified condition.

Problems 8-11

Determine the height of the expanded bed for the sand used in Problem 8-10 if the backwash rate is 1,000 m/d.

Problems 8-16

Determine the number of filter beds for Eau Gaullie ( Problem 8-10 ) if the maximum day design flow rate is 3,800 m³ /d.