Flocculator-clarifiers similar to the one illustrated in Figure 7-10 are proposed for pr...

Flocculator-clarifiers similar to the one illustrated in Figure 7-10 are proposed for precipitation in lime—soda ash softening of a groundwater. The inside diameter of the tank is 40 ft and sidewater depth is 10 ft. The cone-shaped skirt is 12 ft in diameter at the water surface and 24 ft in diameter at the bottom, which is at a depth of 8.0 ft below the water surface. The design flow for each flocculator-clarifier is 750,000 gpd. Does this proposed design meet the Standards for Water Works for detention times based on total volume, mixing and flocculation time, and upflow rate based on the open-water surface area? (The cone-shaped shirt can be considered to be the geometric form of a conical basin illustrated in the appendix.)