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close this book Water purification, distribution and sewage disposal for Peace Corps volunteers
close this folder Section 5: Construction techniques
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View the document Scheme
View the document Concrete
View the document Construction at the source
View the document Construction at the pumping station
View the document Construction at storage facility
View the document Construction on supply line
View the document Lesson plans

Lesson plans

CONSTRUCTION TECHNIQUES

LESSON NO. 1

LESSON OBJECTIVE: To build an intake site and install pumping facilities.

TOPIC

INSTRUCTIONAL PROCEDURE

SUPPLEMENTAL MATERIALS/RELATED READING

Intake Structures

Discuss need for and effectiveness of, various types of intake structures.

WHO Monograph Series #42,

Chapter 5.

 

Take field trip to an open source with a visible intake structure

Intake Structure.

Designing Intake Structures

Divide class in small groups. Let each design (and construct) a simple intake structure.

structure.

 

Draw conclusions indicating when to use an intake structure.

 

Pump Selection

Discuss in class what sort of lift pump is required.

Section 3 on Pump Selection.

Concrete in Construction Work

Introduce concrete in construction work - its structure.

Concrete blocks.

Raw ingredients for making concrete.

 

Demonstrate how to determine the amount of each ingredient.

 
 

Demonstrate how to mix concrete properly.

 
 

Let students determine the required amount of each ingredient using the chart.

 

Testing Concrete

Demonstrate the test for strength.

Slump Tester.

 

Discuss in class the need for reinforcing concrete.

Concrete pipes:

a) reinforced

b) not reinforced.

 

Test reinforced concrete and one not reinforced.

Strain-Stress Testing Machine.

Bu Tuing a Pump House

Discuss when a pump house is necessary.

 
 

In the field demonstrate how to build a pump house. (If not possible, the students should be given chance to work with a building crew).

Building Materials.

 

CONSTRUCTION TECHNIQUES

LESSON NO. 2

LESSON OBJECTIVE: To teat water obtained from a source for drinking water standards.

TOPIC

INSTRUCTIONAL PROCEDURE

SUPPLEMENTAL MATERIALS/RELATED READING

Testing Water

Samples

Ask students to recall the characteristics of water that should be tested.

WHO Monograph #42, pp. 46-54.

 

In the laboratory (or in the field) demonstrate how to use the various kits commonly used in the field.

Portable water laboratory field kit. Microfilte tester.

Exercise on Water Tests

Divide class into convenient groups and let each group test for a different pollutant.

 
 

Verify each result.

 

 

CONSTRUCTION TECHNIQUES

LESSON NO. 3

LESSON OBJECTIVE: To construct a treatment system appropriate for simple water purification.

TOPIC

INSTRUCTIONAL PROCEDURE

SUPPLEMENTAL MATERIALS /RELATED READING

Assembling

Treatment Systems

Ask students to recall the functions of component parts of various treatment processes.

Sand filters, chlorinators, aerators, settlement basins, chemicals, measuring vessels.

 

Divide students in working groups.

Section 4 on the functions of component parts of various

 

Let each assemble a most complete purification system. processes.

 
 

Test the efficiency of the constructed treatment systems

 

 

CONSTRUCTION TECHNIQUES

LESSON NO. 4

LESSON OBJECTIVE: To install a storage tank and distribution pipes properly suited to the local environment.

TOPIC

INSTRUCTIONAL PROCEDURE

SUPPLEMENTAL MATERIALS/RELATED READING

Building a Distribution

Reservoir

Take a field trip to storage sites.

Section 4 on storage tank. Central distribution system.

 

Using model designs, let each student assemble a distribution reservoir.

Plans and model block instruction manuals on assemblage.

 

Stress the importance of outlet, inlet and overflow pipe screens.

Paint and brush (or spray).

 

In a field inspection of local systems, let each student trace a distribution line from reservoir to a house.

 

Pipe Laying

As field exercise, take the whole class to dig a trench and lay 50 ft. of pipe.

Short pipes of different diameters, pipe joints, welding torch

Rivets.