Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called__________________?
Correct answer: B. Sedimentation
- A. Classification
- B. Sedimentation
- C. Clarification
- D. Decantation
Explanation
Sedimentation separates a suspension by gravity into a clarified upper liquid and a settled sludge or sediment. Clarification emphasizes recovery of clear liquid, whereas thickening emphasizes concentration of solids, so sedimentation is the broader term here.
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