Residual chlorine must be maintained in

Question

Quizplus · Accepted Answer

Residual chlorine is used in water treatment to disinfect water and kill any remaining pathogenic bacteria, viruses, or protozoa. It is not typically used in sewage treatment processes. Chlorine can also be used in anaerobic sludge digestion, but residual chlorine is not necessary for this process. Tertiary sewage treatment may involve disinfection, but this process typically uses alternative methods such as UV light or ozone rather than chlorine. Therefore, the best choice is B) water treatment.

Residual Chlorine Must Be Maintained in