Design a longitudinal serpentine chlorine contact chamber for a design flow of 20,000 m3 · d−1. Chlorine (Cl2) is to be used as the disinfectant. The temperature and pH of the water are 10°C and 8.0, respectively. The chamber is designed to ensure 2 log removal of Giardia and have a t10/t0 of 0.5 and a L/W = 60. Assume H = 3W.
(Note: The CT value for 2-log inactivation of Giardia cysts by free chlorine at 10°C and a pH of 8.0 is 108 (mg · L−1)-min at a chlorine concentration of 1 mg · L−1.)
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