Which of the following is NOT a design parameter in flocculent settling?

Correct option is D

Flocculent Settling Process:
· Flocculent settling refers to the process where suspended particles aggregate (flocculate) into larger particles, increasing their settling velocity.
Design Parameters in Flocculent Settling:
(a) Surface Overflow Rate:
· Determines the flow rate per unit area of the settling tank.
· A critical parameter for ensuring effective removal of suspended solids.
(b) Depth of Tank:
· Impacts the settling time and overall efficiency.
(c) Hydraulic Retention Time (HRT):
· Refers to the time water spends in the tank, which affects settling and flocculation.
Information Booster: 1. Key Design Parameters in Settling Tanks:
· Surface loading rate.
· Tank depth.
· Detention time (or hydraulic retention time).
2. Operational Parameters:
· Coagulant type and dose.
· pH and mixing intensity during flocculation.
3. Importance of Flocculent Settling:
· Widely used in water and wastewater treatment for removing turbidity and suspended solids.