Wastewater is treated in a series of steps. First, any large floating objects (big rocks, wood, animals) are removed. Then it is aerated by pumping water through the water to allow the noxious gases out from decomposing organic matter. The sand, grit, and organic matter is allowed to settle and then removed. Finally, floating scum is skimmed off the surface. Some treatments also include a filtration component were the wastewater is “scrubbed” with sand to pull out all the tiny particles of impurities. The last step is chlorine, which kills the bacteria in the wastewater.
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