Activities Gallery - CHESTNUT CLASS - class teacher Jane Prelogauskas & Mellina Wall
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Visit to the water treatment works at Sutton Bingham |
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) Sand is used in the water treatment works to filter the water |
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) Yuk! Dirty water going into the filter |
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) You couldn't use this dirty water |
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) See the cleaned water running through. It is still not suitable for drinking as it has lots of microscopic germs in it. |
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) Much cleaner than when it started. |
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) We arranged them to show that the filters didn't all filter out the same amount of dirt. |
) The dirtier water had been stirred more which meant the gaps between the sand particles was larger. |
) This allowed some of the dirt to go through. |
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) In the treatment works the water goes through lots of filters to make it really clean. |
) There were lots of fishermen fishing for trout. |
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) What a lot of water. |
) This was the overflow. What a long way down. |
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) All these machines work to clean the water |
) Chlorine is added to the water to kill germs. Don't worry; we all know it is poisonous, but only a few parts per million parts of water are added to the water. |
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) Yuk- this is the scum layer that is taken out of the water. It was not very nice! |
) This is a giant sieve that takes out all the big bits of dirt |
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) This didn't look too good. |
) Flocculation is when air and other chemicals are mixed into the water and the particles come to the surface and join together. Eventually they form the scum layer and are scraped off |
) The scrapers work automatically |
) See the particles as they coagulate. |