Question

The settling velocity of a particle in a sedimentation tank depends on

Answer 1

The settling velocity of a particle in a sedimentation tank depends on surface area of tank.

Sedimentation is a physical water treatment process in which gravity is used to remove suspended solids from water. Coarse and heavy suspended particles such as sand and silt are removed through this process. The tank or basin which is used for retention of water is called the sedimentation or settling tank. The time for which the water is retained in the tank is known as the detention period or time. The particles which settle at the bottom of the tank are referred to as sludge.

Answer 2

Since the options are not given, I am giving a general answer.

The correct answer could be - Surface area of the sedimentation tank.

The settling velocity of a particle is defined as the residence time that is taken by the particles for settling down in the tank. This settling velocity helps in calculating the volume of the sedimentation tank.

The hydraulic settling of particles inside a sedimentation tank is known to be affected by factors like the Velocity of flow of the water in the tank, the size and shape of the particles, the specific gravity of the particles, the viscosity of water, the rate of surface overflow, etc.