What is the process of dechlorination used for?

The process of dechlorination is specifically aimed at removing residual chlorine from wastewater. Chlorine is commonly used in water treatment processes for disinfection, as it effectively kills harmful pathogens. However, after the disinfection process, residual chlorine can be harmful to aquatic life if the treated water is discharged into natural bodies of water.

Dechlorination is therefore a critical step to ensure that the chlorine levels are minimized or eliminated before releasing the water back into the environment. This process typically involves the use of chemical agents such as sodium bisulfite, activated carbon, or other substances that can effectively neutralize chlorine, making the treated water safe for aquatic ecosystems and complying with environmental regulations.

The other options do not accurately describe the purpose of dechlorination. Adding chlorine to water is contrary to the dechlorination process, as is enhancing water filtration, which may involve different techniques unrelated to chlorine removal. Recycling chlorine is also not aligned with the purpose of dechlorination, which focuses specifically on the removal of chlorine rather than its reuse or recycling.