Environmental Engineering: Fundamentals and Design - Chapter 10

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TOC > Ch. 10 > 10.5 Sedimentation

# Chapter 10 Drinking Water Treatment

David W. Hand and Qiong Zhang

## Sedimentation

Next, the water flows to a tank called a sedimentation basin where gravity causes the flocs to settle to the bottom. Large particles settle more rapidly than small particles. It would take a very long time for ALL of the particles to settle out and that would mean we would need a VERY large sedimentation basin. So the clarified water, with most of the particles removed, moves on to the filtration step where the finer particles are removed.

#### Credits

Treatment illustration: © 2007 State of Michigan.
Sedimentation animation: © 2007 State of Michigan.

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