Which disinfection method involves adding a chemical that releases hypochlorous acid?

The disinfection method that involves adding a chemical which releases hypochlorous acid is chlorination. Chlorination is a widely used process in water treatment where chlorine is added to water. When chlorine is introduced to water, it reacts to form hypochlorous acid, a powerful disinfectant that effectively kills bacteria, viruses, and other pathogens, ensuring that the water is safe for consumption.

Hypochlorous acid is particularly effective due to its ability to penetrate microbial cell walls, causing cellular damage and ultimately leading to the death of the microorganisms. This makes chlorination a crucial step in potable water treatment, as it helps to prevent waterborne diseases and maintain public health.

Other disinfection methods, like bromination and ozonation, use different chemical processes and active agents, while ultraviolet treatment relies on light rather than chemicals. Therefore, chlorination is specifically recognized for its role in generating hypochlorous acid during the disinfection process.