The whole process of recycling water starts with something called physical systems. It starts off as raw sewage which is 99.9% water with chunks of garbage and sticks floating in it. The raw sewage passes through bar screens, which are metal rods that are underwater that act as a filter. As the water with chunks of waste and garbage in it passes through the bar screens, the garbage
gets filtered out.
After the water passes through the bar screens, it goes into a grit chamber. In the grit chamber, the influent flow of water is slowed so that the sand and gravel fall to the bottom of the chamber. Even after that, it enters the primary clarifier, which slows it even further, allowing the organics to fall to the bottom and the fats an
The water then moves in to an aeration chamber where oxygen is mixed with the water. Microorganisms then consume the material as food which reduces the BODs in the water. Also, they make non settleable solids settleable. Most of the end up in final clarifiers, and they end up in wastewater solids. After that comes chemical systems.
d oils to float to the top. All of this only removes about 50% of the contaminents in the water. The process then moves on to Biological Systems.
Recycling Water And Tires
The point of chemical systems is to remove the microorganisms that dont go into the final clarifiers. Chlorine contact chambers are used to kill theses microorganisms. Since it is not good to have chlorine in rivers and lakes, sulfer diocide is used a lot of the time to get rid of the chlorine. Also, some water recycling plants have started using ultraviolet radiation in place of the chlorine.
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