What is the primary purpose of coagulation and flocculation in water treatment?

What is the primary purpose of coagulation and flocculation in water treatment?

• A. To remove dissolved minerals
• B. To clump particles together for easier removal
• C. To add taste
• D. To sterilize water

Answer: (B)

Coagulation and flocculation focus on making tiny particles large enough to be removed. In raw water, many particles are so small and carry charges that they stay dispersed. A coagulant neutralizes those charges, allowing the particles to come together. Then gentle mixing helps these destabilized particles collide and bond into larger clumps called flocs. Heavier and bigger, the flocs settle out in a sedimentation basin or get trapped by filters, making the overall removal process more effective. This doesn’t target dissolved minerals, add taste, or sterilize the water, which is why clumping particles together for easier removal is the correct purpose.

Coagulation and flocculation focus on making tiny particles large enough to be removed. In raw water, many particles are so small and carry charges that they stay dispersed. A coagulant neutralizes those charges, allowing the particles to come together. Then gentle mixing helps these destabilized particles collide and bond into larger clumps called flocs. Heavier and bigger, the flocs settle out in a sedimentation basin or get trapped by filters, making the overall removal process more effective. This doesn’t target dissolved minerals, add taste, or sterilize the water, which is why clumping particles together for easier removal is the correct purpose.