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close this book Water purification, distribution and sewage disposal for Peace Corps volunteers
close this folder Section 2: Water treatment
View the document Overview:
View the document Self purification
View the document Basic steps in treating water
View the document Sample designs for treatment systems
View the document Lesson plans

Lesson plans

WATER TREATMENT

LESSON NO. 1

LESSON OBJECTIVE: Describe and demonstrate how to estimate the coat of the four methods used in treating water.

TOPIC

INSTRUCTIONAL PROCEDURE

SUPPLEMENTAL MATERIALS /RELATED READING

Treatment

Processes

Discuss the process of self-purification.

List and describe the four basic methods of water treatment:

1) coagulation

2) sedimentation

3) filtration

4) disinfection.

Outline the essential components of sand filtration and two chlorination units.

Estimate the costs of construction, operation, and maintenance for these units.

Manual of Individual

Water Supply Systems

p. 64-83.

WHO Monograph Series #42

p. 171-193.

Small Water Supplies

p. 26-47.

 

WATER TREATMENT

LESSON NO. 2

LESSON OBJECTIVE: Define the pollutants that must be eliminated;

(a) to provide esthetically pleasing and safe water; and,

(b) to prolong the life of the delivery system.

TOPIC

INSTRUCTIONAL PROCEDURE

SUPPLEMENTAL MATERIALS/ RELATED READING

Permissible Levels of Chemical, Physical and Bacteriological Pollutants

List and describe pollutants that are

1). esthetically objectionable

2) health hazards

3) contribute to the destruction of a delivery system.

Establish permissible levels of concentration for each of these pollutants.

Recall the processes that will eliminate or reduce these pollutants.

From a list of pollutants, have each student state the undesirable property (ies) of each and recall a method of elimination (if applicable).

WHO Monograph Series #42

p. 46-54.

WATER TREATMENT

LESSON NO. 3

LESSON OBJECTIVE: Define the criteria that must be applied in selecting the most economically feasible source.

TOPIC

INSTRUCTIONAL PROCEDURE

SUPPLEMENTAL MATERIALS/RELATED READING

Criteria of Water Supply Selection

Review the basic requirements of a water supply source.

Small Water Supplies

p. 8-14

 

Outline the criteria to be used in the selection of water supply sources.