The polluted water requires Chlorine of 8 kg/day to treat 20,000 cubic metre per day. The residual after 10 minutes contact is 0.20 mg/𝑙 . The dosage will be:
A. 0.8 mg/𝑙
B. 0.6 mg/𝑙
C. 0.4 mg/𝑙
D. 0.2 mg/𝑙
Answer:C
The polluted water requires Chlorine of 8 kg/day to treat 20,000 cubic metre per day. The residual after 10 minutes contact is 0.20 mg/𝑙 . The dosage will be:
A. 0.8 mg/𝑙 B. 0.6 mg/𝑙 C. 0.4 mg/𝑙 D. 0.2 mg/𝑙