treatment of water

Influence of PSD method development on Sedimentation Process

Industries always consider particle size distribution in the treatment of water.

It helps in the PSD method development on sedimentation process of storm water treatment. This is done by the removal of heavy metals or solids and pollutants. The velocity or speed of the sediments are determined by the shape, size, density and texture of the particles.

Notions Guiding PSD in the Removal of Sediments

The first is the belief that the size of particles influences the settling speed or velocity of the particles. That is, the weight of the particles, which is based majorly on how big or small they are, determines how they settle. Also, it is of the notion that the coming together or concentration of metals depend solely on their sizes.


Instruments of PSD Sedimentation Process

Detention ponds

These are the common PSD method development on sedimentation methods industries use in water treatment and pollutants removal. The operations of the detention ponds depend on the size of the ponds, detention time and the conditions of mixing.

Detention time = pond volume ÷ inflow. Inflow is the highest flow rate of rain that falls on impermeable surface. To model the removal performance,  fully mixed condition must represent the minimum percent while the quiescent condition is the maximum percent.

Hydrodynamic Seperators

They are one of the PSD method development on sedimentation process’ devices industries use to treat stormwater. They calculate the percent removal as a function of settling velocity and flow. In its calculation, it takes in the consideration of some  variables, such as the diameter of separator, the depth of water, removal efficiency, and pecelet number.

Heavy Metals

Metals absorb with sediments. Small sediments attract more metals while particles of large sediments attract lesser metals. Large particles have large surface area per mass and large settling velocities. Thus, large particles retain more in the sedimentation process.


The PSD method development is an important feature that helps in the water treatment by the use of sedimentation  practice.


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