The water purification process in the United States is complex. When you explain water purification to students, you should emphasize there are fewer water borne illnesses in this country than in many other areas of the world, but there are still some problems that need to be worked out.Without visual aids it is difficult to explain water purification process, in its entirety. But, hopefully this will give you a general idea. There are variations in the techniques used by treatment facilities, but most include the following steps.The original source of the water could be a man made lake. When it is first carried into the facility, it will contain large amounts of debris, such as mud, leaves and probably trash thrown in by uncaring individuals. A wire mesh traps the larger debris.A process called coagulation causes smaller clumps to stick together and sink to the bottom of a tank, where they can be easily removed. Flocculation is usually used to clarify and then a variety of chemicals and filters are used to disinfect and remove tiny particulates.Lime may be used to bind with certain contaminants. Chlorine is often used to disinfect or kill bacteria. When you explain water purification, you… Read full this story
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