Page 27 - Ranger PT3 2022 science

Science PT3 Chapter 5 Water and Solution

5.3 Water Purification and Water Supply

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1. The following shows the water purification method:

Boiling
Pond
• Boiling kills microorganisms. water
• Dissolved substances and dispersed nutrients still remain in
boiled water.
• Boiled water is used as drinking water at home.

Chlorination
• Chlorine solution is added to water with the aim to kill
microorganisms. Chlorine
• Chlorination does not destroy dissolved substances nor Glass rod solution
suspended particles. Pond
• Chlorination is suitable to be used in the swimming pool and water
water tank in the public water supply system.

Filtration
• Filtration eliminates suspended particles. Water pond
• Filtered product is clear without any suspended particle but
still contains dissolved substances and microorganisms.
• Filtration is used to filter water at home and at the water
purification plant. Filtrate

Distillation
• Distillation eliminates all impurities, microorganisms Thermometer Liebig condenser
and dissolved substances. Distillation Form 2
• The distillation process involves the boiling and flask Distillate
condensation processes in order to obtain distilled Pond water
Wire
Form 2
water. gauze
• Distilled water is used to prepare medicine at
hospitals, for laboratory use and for diluting concentrated acid.
Water Supply System
Oxidation tank
Filtration tank

Pump station
Alum and slaked lime
Water reservoir
Sedimentation
Filtration tank tank
Coagulation tank

Chlorination Clean water
tank
Fluoridation Pump station Storage
tank To users

Diagram 5.7 Water supply system

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05 Ranger Science Ting.2.indd 158 30/03/2022 1:57 PM