Question

12) Secondary disinfection of drinking water is necessary to

A) maintain sufficient residual in the water distribution system to inhibit microbial growth.
B) prevent the formation of biofilms on pipes in the water distribution system.
C) neutralize taste- and odor-producing organic compounds.
D) kill Cryptosporidium and other resistant pathogens.

Answer 1

Secondary disinfection of drinking water is vital for maintaining a sufficient disinfectant level to prevent microbial growth and biofilm formation in the distribution system, ensuring water safety.

Step-by-step explanation:

Secondary disinfection of drinking water is a critical step in the water treatment process. Its primary purpose is to maintain a sufficient level of disinfectant residuals throughout the water distribution system. This residual disinfectant helps to inhibit microbial growth and prevent the formation of harmful biofilms on pipes, contributing to the continued safety and quality of drinking water as it travels from the treatment plant to consumers' taps.