Water SystemsThe Water Treatment Process
For Starters ...
Watch the Peel Water Treatment Tours› Water Treatment Plant Tours
Complete the reading on Peel’s Water Treatment Process.› Create 2 ‘closed-ended’ questions and 1
‘open-ended’ question regarding the reading. Answer them as well.
› Once completed, you will be testing partners with your questions.
Vocabulary
Based on the Peel Water Treatment videos and reading, attempt to match up the terms/processes and definitions.
Activity will be answered as we go through the extravagant process!
Making Water Drinkable
We usually get our drinking water from wells, lakes (Lake Ontario), or rivers.
In nature, water often contains impurities and toxins.
How is fresh water made for safe drinking?
The Water Treatment Process The are 6 phases in the water treatment process:1. Intake2. Coagulation &
Flocculation3. Sedimentation4. Filtration5. Disinfection6. Storage
Intake The first step is to remove large objects from the
water and from entering the treatment plant.
A metal screen covers the end of a pipe that draws water from its source.
Coagulation & FlocculationCoagulation: In a large tank, the process of rapid mixing of alum (a
chemical) and water pushes large suspended particles to the bottom of the tank for removal.
Flocculation: In a large tank, the process of slow mixing that causes the
remaining particles (floc) to join and sink to the bottom of the tanks for removal.
Sedimentation A settling tank where the water flows
slowly to allow the floc to settle to the bottom of the tank.
The clear water moves to filtration.
Filtration Partially cleaned water moves through a sand
and charcoal filter.
This removes any remaining waste solids and small pieces of floc.
The water is now clear, colourless, and odourless.
Disinfection The water may still contain micro-
organisms, such as bacteria.
Chlorine is added to kill any micro-organisms.
Storage The treated water can then be stored
in sealed containers, ready for use.
Independent Task
To further your understanding, read pages 20-22 in Nelson Perspectives and answer the “Check You Understanding” questions.
Nelson: Making Water Drinkable (10.5)
The Water Treatment Process
Lab – Water Filtration Challenge
Read and review the lab as a class, and note the different steps in the challenge
Videos Water Filtration Experiment
(w/ Sedimentation Process)
Filtration Device Example
Filtration Device Example