How do they make my
What really happens?
Wouldn’t it be nice to be able to walk down to the neighborhood pond, river, or lake and simply drink the water with no fear of getting sick? Unfortunately, almost all sources of water carry microbes, chemicals, or bacteria that can be harmful to humans if it is drunk. Therefore, water has to be treated with a very well defined process in order for it to be considered safe water by the EPA. What are these steps?
1. COAGULATION & SEDIMENTATION: One of the first steps in most conventional water purification processes is the addition of chemicals to assist in the removal of particles suspended in water. The water is treated so the particles in the water will clump together and settle to the bottom.
2. FILTRATION: Once the large clumps are removed, the water passes through a series of filters to remove the smaller particles in the water. Cross flow membrane filtration removes both salts and dissolved organic matter, using a permeable membrane that only permeates the contaminants. The remaining concentrate flows along across the membrane and out of the system and the permeate is removed as it flows along the other side of the membrane.
3. DISINFECTION: Finally, the water is treated with a disinfectant, like chlorine, that kills all bacteria and other harmful microbes in the water that are harmful to humans. Disinfection is one of the most important steps in the purification of water from cities and communities. It serves the purpose of killing the present undesired microorganisms in the water; therefore disinfectants are often referred to as biocides.
4. DISTRIBUTION: Once the water is treated, it is then piped throughout the town, city, or municipality where it eventually makes its way into the plumbing of each individual home.