Following completion of Chapter 4, students should be able to:

1. Describe the need for coagulation and flocculation.
2. Perform a jar test.
3. Select the proper coagulant and determine the dosage.
4. Adjust chemical feed rates.
5. Select optimum speeds for flash mixers and flocculators.
6. Collect samples from the coagulation and flocculation basins.
7. Start up and shut down a coagulation-flocculation process
8. Operate and maintain coagulation-flocculation processes.

The main purposes of this chapter are to learn how to properly perform a jar test, select optimum chemical dosages, and to start up, operate, shut down, and maintain coagulation and flocculation processes.

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