English Instructor Manual (PDF) - Metric Version - National ...

Chapter 5 – Disinfection
Handbook: Pages 47-58
Suggested Time:
PowerPoint Slides:
60 minutes
Chapter 5 Slides
Materials:
Objectives: At the end of this lesson, the student will be able to:
1. Explain the difference between disinfection and oxidation
2. Explain the differences between the various types of disinfectants
3. Explain the factors to consider when selecting a disinfectant
4. List the compounds formed when chlorine is added to pool/spa water
5. List the types of chlorine generally used in pool/spa water disinfection
6. List the alternative disinfectants that can be used in pool/spa water
Leading Questions:
What type of disinfectant do you use in your pool/spa?
How is it administered into the water?
Do you use a stabilizer or conditioner?
How is your testing recorded? How often on weekends?
Is there a regulatory agency who reviews your testing results?
Key Points: Discuss the difference between disinfection and oxidation. These include:
Disinfection is also called sanitation. We use the word “disinfect” throughout
this course to maintain consistency with the Centers for Disease Control and
Prevention.
Disinfection is the process of destroying organisms that are harmful to people. This
includes destroying many of the organisms previously discussed.
Oxidation is the process of changing the chemical structure of a contaminant thus
helping remove it from the water.
Explain that both processes have to occur continuously to have water that is sanitary.
Key Points: Discuss the factors to consider when choosing a disinfectant. These include:
The type of facility (pool, spa, therapy, waterpark attraction)
Whether it is an indoor or outdoor facility
The normal operating water temperature
The number of people using the facility
The person responsible for the water chemistry
The space available to store chemicals
Any supervision or maintenance concerns
Any applicable codes or regulations
© 2014 National Swimming Pool Foundation® Page 53