Question

please solve this water treatment problem

FINAL PROBLEM 1-TRACER TESTING The following data were obtained from a tracer testing of an existing chlorine contact tank. Time, min Tracer Time, Tracer min l ime, minTracer Concentration Concentration Concentration 0.0 0.0 0.1 2.1 10.0 12.0 10.2 70 80 90 100 110 120 130 8.0 6.0 4.3 3.0 2.1 1.5 140 150 160 170 0.5 10 20 30 40 50 60 0.0 0.0 Using the data determine: a) the mean hydraulic retention time and the corresponding variance, b) c) d) the to time (10% of the mass of tracer has passed through the contactor) the modal time the dispersion number, d- * ?2??/T, where T is the actual HRT-V/Q

Answer 1

Saluctiou 0-2 jo 5 4.3 3 δ0 60 Fo go go. lco ilD 120 130 110 lso i60 170

to determine → te9 heter) at true diuen, t = BY EU

10 30O 一寸08:26 マチ0.826 VnL ー2 に 56.9 × 10 5 25.8355 o 16.322 2309-513(ame) 2 오 = 16-21 30q.513 tue eoutaeters (trum Hue. Ye.ph) tlo tinue 40rrivudu = 309.513 = 5石,9x10 0,826 BY EU