Mechanical Operations - Study Mode

Explanation

Solution: The correct answer is B: Thickeners . Let's break down why: Sedimentation is the process where solid particles settle out of a liquid due to gravity. Thickeners are specifically designed to perform sedimentation on a large, industrial scale. They are large tanks where solids are allowed to settle to the bottom, forming a concentrated sludge, while the clarified liquid is removed from the top. Here's why the other options aren't the best fit: A: Classifiers : Classifiers separate particles based on size and density, often using a combination of sedimentation and hindered settling, but they're more about separation into different fractions than just bulk removal of solids from a liquid like in sedimentation alone. C: Rotary drum filters : Rotary drum filters use a rotating drum covered with a filter medium to separate solids from liquids. This is a filtration process, not sedimentation. D: Cyclones : Cyclones use centrifugal force to separate solids from gases or liquids. While they can separate solids from liquids, they are not primarily based on gravity-driven sedimentation. They are more efficient for separating fine particles. Therefore, thickeners are the primary equipment used for sedimentation on a commercial scale.