S: Water Treatment
BC: Real life Examples: Water & Sewage Treatment | walkerton tragedy: | Spanish sewage water spill: | In 2000, the small town, Walkerton suffered incidents with the water. Citizens were receiving strange symptoms and diseases, and they realized that the water was contaminated with E. coli bacteria. 7 died and 2,500 were sick. However, Walkerton public utilities confirmed that the water was safe to drink. In the end, the citizens were told to not drink the water and the case spilled to the public. | In 1998, somewhere in Spain, there was a sewage water leak. In addition, it reached the Guadiamar River, causing the river to be polluted. When one part of the ecosystem is polluted, it effects many other things too. As a result, the forests were affected, the fish and birds died, farmers had some trouble with their harvests. The cause of this disaster was the weak dam walls | that were holding the sewage water.
FC: Water & seWage Treatment | From your house to the lakes and back to you. | Jamie Cheung
1: What Is Water Treatment? Drinkable water is taken from lakes, and is treated so that it is clean. This water was once your waste from the toilet, since water is recycled. | What Is Sewage Treatment? Sewage is the water and waste from toilets and sinks. Sewage treatment is the process of cleaning this, which gets sent to lakes after.
2: How Does Sewage Treatment work?~ | Sewage treatment is separated into 3 different parts. Primary, Secondary, and Tertiary treatment | Firstly, the water goes to it's primary treatment, which has the waste removed using a metal grid, somewhat like a strainer. Secondly, the water reaches a pool where the solids settle and oil float. Workers then are able to remove the waste. Thirdly, the water reaches another tank that contains bacteria. This certain type of bacteria is able to break down plant and human waste. Then, they all settle to the bottom and get removed by the workers. Lastly, the water enters another pool where it is cleaned by chemicals such as ozone and chlorine. Nitrogen and Phosphorus are able to be removed.
3: Lastly, the water is sent to lakes, rivers, and oceans.
4: How does Water treatment work? | There are a few stages in water treatment. Coagulation, sedimentation, filtration, disinfection, and storage. | Firstly, the water goes through the stage of coagulation, where the sediment and dirt in the water are removed. Coagulation is somewhat like a magnet sticking the dirt together. They add in chemicals and cause the particles to stick together, creating flocculation. After, the water is sent to tanks, and the sediment is settles. This process is called clarification. Then, the water is sent to filtration, where it is pushed through layers of sand and gravel to remove the smaller particles. Finally, the water is goes through disinfection, where chlorine and ozone do it's job of cleaning any bacteria or microorganisms. Now the water is clean, and is ready to go through the pipes and to homes and businesses in the area.
5: Process of water treatment