1. What are the two advantages of tube settler as compared to the conventional sedimentation? 2....

1. What are the two advantages of tube settler as compared to the conventional sedimentation?

2. Compare the following factors for chlorine and ozone

Disinfection time and dose
Residual disinfection
Interference by raw water turbidity
THM formation

3. The water from a river used for water supply contains 6 mg/L of BOD₅, 2 mg/L of aldrin (pesticide residue) and 14 NTU of turbidity. Suggest a treatment process which is technically and economically viable. Explain the reason why you selected this treatment system?

4.Under what conditions is powdered activated carbon preferred over granulated activated carbon adsorption system? and Why?

5.Explain two situations where the dissolved air flotation (DAF) is preferred over a sedimentation tank in drinking water treatment.

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Expert Solution

Ally Wells answered 3 months ago

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