What is the water treatment step that effectively removes 99 percent of viruses?

What is the water treatment step that effectively removes 99 percent of viruses?

• A. Chemical coagulation
• B. Filtration
• C. Ultraviolet disinfection
• D. Chlorination

Answer: (A)

The step in water treatment that effectively removes 99 percent of viruses is ultraviolet disinfection. This method employs UV light to inactivate microorganisms, including viruses, by disrupting their DNA or RNA, rendering them incapable of reproduction and infection. This process is highly effective and does not rely on chemical additives, making it a preferred choice for improving water quality and ensuring safety. While chemical coagulation is essential for removing larger particles and impurities from water, its effectiveness against viruses is not as pronounced, often requiring additional treatment methods to achieve a high level of pathogen removal. Filtration can also reduce virus concentrations, particularly when advanced filtration methods are used, but it does not guarantee the same high removal rate as ultraviolet disinfection. Chlorination is commonly used to disinfect water and can inactivate viruses, but it may not achieve the same 99 percent removal rate as UV treatment, and some viruses can be resistant to chlorine. Therefore, ultraviolet disinfection stands out as the most effective standalone method for significant virus removal in water treatment.

The step in water treatment that effectively removes 99 percent of viruses is ultraviolet disinfection. This method employs UV light to inactivate microorganisms, including viruses, by disrupting their DNA or RNA, rendering them incapable of reproduction and infection. This process is highly effective and does not rely on chemical additives, making it a preferred choice for improving water quality and ensuring safety.

While chemical coagulation is essential for removing larger particles and impurities from water, its effectiveness against viruses is not as pronounced, often requiring additional treatment methods to achieve a high level of pathogen removal. Filtration can also reduce virus concentrations, particularly when advanced filtration methods are used, but it does not guarantee the same high removal rate as ultraviolet disinfection. Chlorination is commonly used to disinfect water and can inactivate viruses, but it may not achieve the same 99 percent removal rate as UV treatment, and some viruses can be resistant to chlorine. Therefore, ultraviolet disinfection stands out as the most effective standalone method for significant virus removal in water treatment.