Mon Prof Augmenté
From Muddy Water to Tap
Age 12 · Technology
Water from a river or lake passes through a row of tanks. Each stage removes something different until the water is clear and safe to drink.
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In the picture
- A metal grate at the inlet: it catches leaves and insects.
- A fine mesh panel: it traps smaller floating particles.
- A bubbling gas chamber: gas bubbles mix into the water to disinfect it.
- A dark granular bed: carbon granules absorb odors and chemicals.
- A small chlorine dosing pipe above the final tank: a last chlorine dose keeps the water protected.
Examples
- A home water filter pitcher uses a carbon cartridge.
- A swimming pool adds chlorine to keep the water clean.
Key takeaways
- Different stages remove different kinds of dirt and germs.
- Clear water still needs disinfection before it is safe to drink.
Quiz: From Muddy Water to Tap (Age 12)
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Why is water treated in several different stages?
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What is still needed after water has become clear?
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What does the carbon filtering stage do?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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