Question

Which of the following processes is primarily used for the removal of suspended solids from water?

• A. Filtration
• B. Coagulation
• C. Sedimentation
• D. Disinfection

Hint:

Sedimentation is one of the simplest and most effective methods for removing suspended solids by allowing them to settle naturally.

Answer 1

The Correct Option is C

To answer this question, let's examine the processes used for removing suspended solids from water:
Step 1: Filtration is used for separating solids from liquids, but it is typically used after other processes like coagulation or sedimentation to remove finer particles.
Step 2: Coagulation is a process where chemicals are added to water to destabilize particles, causing them to aggregate and form larger particles. While this helps remove suspended solids, it is often followed by sedimentation or filtration.
Step 3: Sedimentation is the primary process for the removal of suspended solids. It involves allowing the particles to settle at the bottom of a container due to gravity. Larger particles will settle faster, and this is the first step in water purification before filtration or disinfection. Thus, the correct answer is Sedimentation.