Civil Engineering - Water Supply Engineering - Discussion

Discussion Forum : Water Supply Engineering - Section 7 (Q.No. 7)

Water Supply Engineering

The duration of contact of chlorine with water before it is served to the first consumer, should be at least

10 to 15 minutes

15 to 20 minutes

20 to 30 minutes

30 to 40 minutes

one hour.

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

2 comments Page 1 of 1.

SHAZ said: 6 years ago

Because 0.5mg per litre up to 20 to 30 minutes is enough for disinfection of bacteria.

Chukwunonso said: 8 years ago

Why 20_30 minutes? PLease explain.

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