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The third stage is when the larger floc particles settle to the bottom. At the Aetra Water Treatment Plant the water is stored in large tanks for the floc particles to settle at the bottom. This is known as sedimentation.
The fourth stage is the water goes through a series of filters. At the Aetra Water Treatment Plant, they use layers of sand,coal and gravel to filter the water. The process of water going through a series of filters is called filtration. While the water flows through the filters the other dirt particles including the floc particles are left outside while the water flows through. Think of it as a strainer instead of wanting spaghetti you want the water that boiled the spaghetti.
The fifth stage is called disinfection. Disinfection is when a disinfectant,such as chlorine or bleach is added to the water which kills any remaining germs,bacteria and harmful chemicals which cannot be seen.
And the last stage is when the water goes through inspection to see if all the machines are working to keep our water clean! In the lab they take water samples from the start of the week till the end of the week, so they can make comparisons from the water that they purified today and with another day.
Now you may think that it will take over an hour just to purify a liter of water, but let me tell you this the Aetra Water Treatment Plant produces over about 5,000 liters of treated water per second, 24 hours a day, 7 days a week. Think, how much litres of treated water would the Aetra Water Treatment plant produce in a day, if they produced about 5,000 litres per second?
I started off my day by going for my tennis lessons at the J.I.S High School. My coach Pak Benny is a very good coach who also teaches tennis at the High School as well as the Middle School. Even though it was a hot day with today’s temperature reaching 40 degrees Celsius I thoroughly enjoyed my tennis lesson. After a refreshing tennis lesson , I headed to the Middle School Library to check out some books by Anthony Horwitz.
Today has been an exciting day because my good friend Tarun had come over to play with me after a really long time! We played badminton and cricket in the garden. Cricket is a sport similar to baseball except there are rules which are completely different from baseball. Cricket is a very well-known sport in India.
After a very active day we had pizza and chicken nuggets for lunch. We spent the rest of the time indoors. Since Tarun loves to play billiards we played billiards in my house. Tarun won the first round while I won the second, so basically it was a draw.
At 4: 30 Tarun had to leave because his aunt was in the hospital so he had to visit her.
And that was the end of a very fun filled and exciting day!! JJ