Water Treatment WSO Student Workbook: Water Supply by Nancy McTigue

By Nancy McTigue

This e-book has been changed by means of a three new models in keeping with operator point:
WSO Water remedy Grade 1 ISBN 9781625761231
WSO Water remedy Grade 2 ISBN 9781625761248
WSO Water remedy Grade three & four ISBN 9781625761255

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Extra resources for Water Treatment WSO Student Workbook: Water Supply Operations

Example text

10. What are some of the chemicals commonly used to raise alkalinity and thereby improve flocculation? • • • • Chapter 4: Coagulation and Flocculation 11. What are some of the advantages of purchasing chemicals already in liquid form? • • • • 12. List two types of chemical feeders. What are the main differences between them? • • 13. What is the most common type of solution feeder? 14. What is a static mixer? 15. List five types of flocculators. • • • • • 16. How does the Disinfectant By-Product Rule affect how coagulation is done at water treatment plants?

The plant is experiencing serious problems with pinpoint (extremely fine) floc. • Describe the procedure you would use to determine what is causing this problem. • Assuming the problem is caused by an improper choice or use of coagulant, relate how you would determine the proper coagulant or coagulant-polymer combination to correct the problem. Make certain that your selection of chemicals is cost-effective. 28 ADDITIONAL NOTES WSO: Water Treatment Student Workbook CHAPTER 5 Sedimentation Basins and Clarifiers OBJECTIVES After completing study of this chapter, you should understand: • the types of basins used for sedimentation • the zones and parts of sedimentation basins • the principles of tube and plate settlers • the methods of sludge removal • typical problems encountered in operating sedimentation basins • the methods for disposing of sedimentation basin sludge READING ASSIGNMENTS 1.

9. Describe the effect of water temperature on chlorination. 47 48 WSO: Water Treatment Student Workbook 10. List some of the interference substances that will reduce the effectiveness of chlorine in killing microorganisms. • • • • • 11. The chlorine remaining after the disinfection of all matter in the water has been completed is called _____________. 12. List the two types of chlorine residual. • • 13. The measure of the amount of chlorine used during the chlorination reactions is called ____________.

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