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

CHEMICALS

1. Describe the proper procedures for using chemicals to remove solids from their treatment plant's secondary effluent.
2. Operate and maintain chemical feed equipment.
3. Safely store and handle chemicals.
4. Review plans and specifications of chemical feed systems.
5. Start up and shut down a chemical feed system.
6. Perform a jar test.
7. Select the most cost-effective chemicals and determine proper dosage.
8. Troubleshoot a chemical feed system.
9. Develop an operational strategy for a chemical feed system.

FILTRATION

1. Identify and describe the components of gravity and pressure filters.
2. Explain how membrane filters operate.
3. Safely operate and maintain filters.
4. Start up and shut down filters.
5. Troubleshoot a filtration system.
6. Develop operational strategies for inert-media and membrane filtration systems.
7. Review plans and specifications for filter systems.

The purpose of this chapter is to teach operators how to safely start up, operate, shut down, and maintain solids removal processes using chemicals and several types of filtration processes. The chapter explains how to perform jar tests, select appropriate chemicals, determine proper chemical dosages, and operate various types of chemical feed systems. It also describes the operation, maintenance, and troubleshooting procedures for gravity and pressure filters as well as membrane filters.

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