Publish Time: 2021-11-29 Origin: Site
Centuries ago, the control of water-borne diseases was awful, people get heavy diseases very often due to a contaminated water supply and lack of techniques to purify water. It was not until the invention of water treatment chemicals that such situations are refined. So, what exactly are the application areas of water treatment chemicals?
Here is the content list:
l What is the normal application of water treatment?
l What are the applications of water treatment chemicals in the water treatment process?
Nowadays, large and small water agencies in the world provide both customers and industries with high-quality and sanitary water every day. But, before disinfection and using water treatment chemicals became a common practice, waterborne diseases such as cholera and typhoid fever spread widely across the United States and Europe. It could be said that the most important application of water treatment technology and water treatment chemicals is the elimination of the spread of waterborne diseases. But the applications today of water treatment technology are far more than just eliminating diseases. For more than half a century, water treatment has also be used to provide hygiene and clean water for landscape, golf, agricultural and industrial uses. These water treatment applications could be listed as follows: Providing clean surface water for landscape use. Purifying and collecting rainwater. Recycling wastewater. Purifying and detoxicating polluted water.
Generally, there are five process steps in water treatments, which are sedimentation, disinfection, filtration, coagulation, and boiling and distillation. Of all the five steps, there are only two steps, disinfection and coagulation, are where water treatment chemicals are used. In the disinfection process, water treatment chemicals such as chlorine are added at the beginning of it to kill bacteria, viruses, and harmful substances in the water. In the coagulation process, the time point where water treatment chemicals should be added is the same as that of the disinfection process. To put in a more specific way, water treatment chemicals such as aluminum sulfate, iron sulfate, and iron chloride are added to the water. These chemicals are called coagulants and have a positive charge. The positive charge of the coagulant neutralizes the negative charge of particles dissolved and suspended in the water. When this reaction occurs, the particles will stick together or coagulate. Since larger particles or flocs are heavy, the particles coagulated together will quickly settle to the bottom of the water supply, so that they could be sedimented and removed. Apart from these two steps above, other steps in conventional water treatment do not need to use the help of chemicals.
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