Question # 1 a) Define ‘Disinfection’ and ‘Sterilization’ OR differentiate between them. b) Enlist the different methods of ‘Disinfection’ which method would you recommend for ‘Municipal Water Supply’ and WHY? Depending on the availability of ‘Source of Water’ which ‘Source’ is more important than the other for disinfection and WHY? Give reason. c) Define or differentiate between “Free Available Chlorine” and “Combined Available Chlorine”. Write their Chemical Formulae and mention which one of them is stronger than the other and by what percentage?
Question # 1
a) Define ‘Disinfection’ and ‘Sterilization’ OR differentiate between them.
b) Enlist the different methods of ‘Disinfection’ which method would you recommend for ‘Municipal Water Supply’ and WHY? Depending on the availability of ‘Source of Water’ which ‘Source’ is more important than the other for disinfection and WHY? Give reason.
c) Define or differentiate between “Free Available Chlorine” and “Combined Available Chlorine”. Write their Chemical Formulae and mention which one of them is stronger than the other and by what percentage?
d) Define “Break Point Chlorination”. With the help of a neat ‘Figure’ show the “Break Point” and also show “Combined Available Chlorine”, “Free Available Chlorine” and “Total Available Chlorine”. Mention the “Dosage” in order to obtain a “Free Available Chlorine Residual” of about 0.5 mg/l or above.
e) Define the term “Chlorine Demand” of water. What are the “Factors” OR enlist the “Factors” that show the “Effectiveness of Chlorine”.
Question # 2
Calculate the “Chlorine Demand of Water”, if “addition of (i.e. Chlorine added)” 200 kg/d of chlorine in a flow of 0.088 m3/sec gives a ‘residual of 0.20 mg/l as Chlorine (Cl2).
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