By: Kyanah Hughes
Water treatment can be different process in different states. This also depends on how clean the water is which varies in different communities. Ground water can filter a lot easier. Surface water requires more treatment. The reason for this lakes,streams, and rivers require have
Steps: In water treatment
Coagulation and Flocculation
Coagulation and flocculation are often the first steps in water treatment. The positive charge of these chemicals neutralizes the negative charge of dirt and other particles in the water. When this happens, the particles bind with the chemicals and form larger particles, called floc.
During sedimentation, floc settles to the bottom of the water supply, due to its weight. This settling process is called sedimentation.
Once the floc has settled to the bottom of the water supply, the clear water on top will pass through filters of varying compositions (sand, gravel, and charcoal) and pore sizes, in order to remove dissolved particles, such as dust, parasites, bacteria, viruses, and chemicals.
After the water has been filtered, a disinfectant (for example, chlorine, chloramine) may be added in order to kill any remaining parasites, bacteria, and viruses, and to protect the water from germs when it is piped to homes and businesses.