Pick out the true statement pertaining to water treatment ?
Correct answer: B. Normally, the turbidity is removed by adding a coagulant prior to sedimentation
- A. Slow sand filters can remove colour completely
- B. Normally, the turbidity is removed by adding a coagulant prior to sedimentation
- C. Application of activated carbon reduces the temporary hardness of water
- D. Activated carbon can be used for taste & odour control without subsequent filtration
Explanation
Coagulation destabilises suspended particles, allowing them to form flocs that are removed by subsequent sedimentation. Activated carbon targets taste and odour, while it does not normally remove temporary hardness.
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