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Question: a poorly educated engineer designs a chlorine disinfection tank as...

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A poorly educated engineer designs a chlorine disinfection tank as a CSTR rather than as a PFR. It has a detention time of 30 min. a. Calculate the reduction in bacteria [1 (Cout/Cin)]*100% that would be achieved using an ideal PFR with a 30 minute detention time operating at the design chlorine dose. The first order rate constant K- 0.23/min. b. What reduction in bacteria does the CSTR achieve? c. The first order rate of kill depends also on the chlorine concentration, k K (C12), where k = new rate constant, K- constant at the design chlorine dose, and (Cl2) multiple of the design chlorine concentrations. How much would the chlorine have to be increased (by what multiple) to increase the rate so that the CSTR would reduce the bacteria from 100,000 cells/ml to 100 cells/ml. Assume K is linearly related to chlorine concentration

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