Following completion of Chapter 5, students should be able to:

1. Explain the need for phosphorus removal and describe some of the different systems used for this purpose at various treatment plants.
2. Place a phosphorus removal system into service.
3. Schedule and safely conduct operation and maintenance duties.
4. Sample influent and effluent, interpret lab results, and make appropriate adjustments in the treatment process.
5. Recognize abnormal operating conditions, understand the cause, and take corrective action to ensure proper phosphorus removal.
6. Inspect a newly installed phosphorus removal facility to determine if installation has been proper.
7. Review plans and specifications for a phosphorus removal system.

The purpose of this chapter is to show students how to remove phosphorus from wastewaters using a modification of the activated sludge process as well as chemical removal by lime precipitation and alum flocculation. Removal of phosphorus by the luxury uptake method is described in detail.

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