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A surface water treatment plant operates round the clock with a flow rate of 35 m³/min. The water temperature is 15 °C and jar testing indicated an alum dosage of 25 mg/l with flocculation at a Gt value of 4 × 104 producing optimal results. The alum quantity required for 30 days (in kg) of operation of the plant is __________
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- 37800 kg
- 35600 kg
- 32800 kg
- 3240 kg
Correct Option: A
37800
Q = 35 m³/min
= 35 × 10³l/min = 35 × 10³ × 60 × 24 l/day
Alum dose = 25 mg/l = 24 × 106 kg/l
∴ For 30 days,
Alum required = (35 × 10³ × 60 × 24) × (26 × 106) × 30 = 37800 kg
