Chlorine is used as the disinfectant in a municipal water treatment plant. It achieves 50 percent of disinfection efficiency measured in terms of killing the indicator microorganisms (E-Coli) in 3 minutes. The minimum time required to achieve 99 percent disinfection efficiency would be

Question

Examsnet · Accepted Answer

Correct Answer is :  19.93 minutes

GATE Civil Engineering (CE) 2019 Shift 2 Solved Paper