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d. Chlorine usage in a 20 000 m3/day treatment plant is 8 kg. The residual after 10 min contact time is 0.15 mg/L. What is

d. Chlorine usage in a 20 000 m3/day treatment plant is 8 kg. The residual after 10 min contact time is 0.15 mg/L. What is the chlorine demand of the water?

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