Episode: Wastewater treatment

Primary

Year F-2

Year 3-4

Year 5-6

Video

Science

Geography

Water cycle

Wastewater

When wastewater leaves homes and businesses it is piped to a sewage treatment plant.

There are more than 720 sewage treatment plants across Australia. There are two main treatment plants in Melbourne, the Western Treatment Plant and the Eastern Treatment Plant, which treats over 90% of Melbourne’s sewage.

The treatment of sewage is important; before our sewerage systems (the pipes and treatment plants) were built, people often became very sick due to waterborne diseases from the sewage flowing in streets. When sewage is treated it is called recycled water which is produced across Australia. It is so valuable as it can sometimes be used instead of water from your dams.

Learning outcomes

Year F-2

Describe the observable weather of a place and seasonal changes using the water cycle
Know that water is a valuable resource and describe how it is used at school and in the home
Know that water can be recycled and describe ways to reduce use and save more water
Know that water is an important resource and we need to conserve it
Describe how our water supply supports people's lives

Year 3&4

Describe the observable weather of a place and seasonal changes using the water cycle
Know that water is a valuable resource and describe how it is used at school and in the home
Know that water can be recycled and describe ways to reduce use and save more water
Know that water is an important resource and we need to conserve it
Describe how our water supply supports people's lives

Year 5&6

Understand the connection between weather and climate and the water cycle
Explain how water behaves in different ways (liquid, solid or gas) using the natural water cycle
Understand that water scarcity is a major threat to the sustainability of people places
Understand how water resources are used and how they are managed
Know that the sustainability of Melbourne requires water and treatment of wastewater

Things to think about

Where do you think the water in your toilet goes after you flush?
What would happen if wastewater wasn’t treated?
What are the benefits of using recycled water?

Activities

Activity 1

Investigate the history of sewage treatment in your town or city. How did new technology like indoor plumbing (toilets) and the building of sewage treatment plants impact people’s lives. Draw a table and describe the differences and similarities between students' daily lives and children in the 1800s.

Activity 2

Find out where your sewage is treated – either your home or school.

Write down the name of the sewage treatment plant.

Check if your treatment plant recycles sewage? If yes, list the types of recycled water and where it is used. If not, find the next closest treatment plant that recycles water and complete the activity.

Activity 3

If wastewater is recycled and reused, should it be called wastewater? What else could we call it? Create a poster promoting the use of recycled water.