12.6 Disinfection Practice

Question 1

the first disinfectant used to achieve microbial inactivation

Answer 1

primary disinfection

Question 2

what four factors is selection of primary disinfectant bounded by?

Answer 2

preceding treatment, TOC concentration, bromide ion concentration, ability to meet microbial inactivation requirements

Question 3

what disinfectant strategy is strongly discouraged if filtration is not a precursor because of byproducts and BOM that promotes regrowth in distribution system?

Answer 3

ozone

Question 4

US EPA uses the Ct concept to determine ability of primary disinfectant to inactivate these three target organisms?

Answer 4

cryptosporidium, giardia, viruses

Question 5

what is the selection of a secondary disinfectant dependent on?

Answer 5

primary disinfectant

Question 6

indication that organic byproducts can be expected to form in the distribution system if chlorine is used

Answer 6

DBP formation potential