This lesson highlights the importance of water and how people interact with it in their daily lives. The audience is taught where their water comes from and where it goes. Since no new water is created, the steps of wastewater treatment and stormwater treatment are broken down and elaborated on.
Dawn Henning, from the City of New Haven Department of Engineering, asks students how they used water that day.
Follow Suzy and her dog P.D. as they hunt for where their water comes from!
Most of sewage is just dirty water mixed with other objects that go down the pipes!
During clumping, chemicals are added to the water that make dirt stick together, creating clumps also called flocs.
Large and heavy solids fall to the bottom → oils and grease are scraped from the surface of the water.
During the next process, settling, the flocs start get really heavy and sink to the bottom of the tank where they can be removed.
After clumping and settling comes filtering. During this step, all of the water being treated flows slowly through filters made up of layers of rocks.
During cleaning, a chemical called chlorine is added. Chlorine is the same thing that is used to clean swimming pools, but when it is used for drinking water cleaning, much less is added.
All the water on the planet has been recycled! After being filtered it is stored to be used again.
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