512 REDOX PROCESSES AND DISINFECTION2.52.01.51.00.50.012348.Cl, dose (mg/L)FIGURE 10-Pr17. Breakpoint chlorination curve for a naturalwater source.However, when exposed to chlorine, only a portionof the potential oxidant demand is actually exerted.Assume (unrealistically) that 10% of the maximumpotential demand is exerted instantaneously whenthe chlorine is first dosed into the solution, beforeany chlorine reacts with ammonia. Assume also that,whenCl, residual (mg/L) combined chlorine residual of 4.0 mg/L as Cl2immediately after dosing?(b) What NaOC1 dose is needed to generate a freechlorine residual of 1.0 mg/L as Cl2?10-17. Figure 10-Pr17 shows a breakpoint chlorinationcurve for a water supply source.(a) Identify the chlorine dose or the range of doseswhere the following statements apply:(i) The free Cl residual is 0.5 mg/L.(ii) The combined Cl residual is 2.0 mg/L.(iii) The chlorine demand is 4.0 mg/L.(iv) When a small increment of chlorine isadded, most of it undergoes no redoxreaction.(v) When a small increment of chlorine isadded, most of it reacts with N-contain-ing compounds.(vi) When a small increment of chlorine isadded, most of it is reduced to Cl.(b) What is the chlorine demand when the chlorinedose is 7.0 mg/L?(c) If the primary reason for disinfecting withchloramines is to reduce the formation of

Answered: Figure 10-Pr17 shows a breakpoint…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Problem 7 - 69 Gasoline at 20°C (sp. gr. 0.719, u = 0.000292 Pa-s) flows at the rate of 2 L/s through a pipe having an inside diameter of 60 mm Determine the Reynolds number Ans: 104.400
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Figure 10-Pr17 shows a breakpoint chlorination curve for a water supply source. (a) Identify the chlorine dose or the range of doses where the following statements apply: (i) The free Cl residual is 0.5 mg/L. (ii) The combined Cl residual is 2.0 mg/L. (iii) The chlorine demand is 4.0 mg/L.