Question

Most traditional water treatment plants units and design limitation

Answer 1

The most traditional process of water treatment was boiling water. This is one of the best methods to kill microorganisms and to purify water. Since it is requires high amount of energy it is not used for large scale water purification.

The traditional water treatment plant unit consisted of methods like

• Screening : In this process coarse and fine screens are place to remove large materials like leaves, bushes, and other larger materials in water
• Coagulation : Coagulants like alum are added to water for the particles in water to form flocs so that particles gets settled quickly
• sedimentation: Water the floc formed are allowed to settle in a sedimentation tank
• Filteration : In this process water is passed through porous medium which consists of coarse and fine layers of materials to remove small particles.
• Disinfection: This process is done to kill pathogenic bacterias from water

The limitation of this process is that

• This method requires large area for the tratment of water and the machines required for operation   
• It also requires huge initial cost and also maintanance cost
• It requires large amount of time for the treatment of water
• Large amount of energy and chemical are required for the operation of the plant.
• It also requires skilled labours and supervision for the operation of the plant.

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