What is a primary advantage of using UV light for water disinfection compared to chemical methods?

Using UV light for water disinfection has a significant advantage in that it does not add chemicals to the water. This attribute is crucial for several reasons. First, it helps maintain the water's natural taste and quality, as the introduction of chemicals can alter these characteristics and may lead to concerns regarding potential health risks from chemical residues.

Additionally, because UV disinfection is a physical process, it eliminates pathogens without the need for additives that could react with other substances in the water and produce harmful byproducts. This advantage is particularly important in drinking water applications where the purity and safety of the water supply are paramount.

While there may be considerations regarding the initial cost or energy efficiency of UV systems compared to chemical methods, the absence of chemical residues is a critical factor that often leads to the choice of UV disinfection in water treatment processes.