Direction: A plain sedimentation tank with a length of 20 m, width of 10 m and a depth of 3 m is used in a water treatment plant to treat 4 million litres of water per day (4 MLD). The average temperature of water is 20°C. The dynamic viscosity of water is 1.002 × 10–3 N.s/m² at 20°C. Density of water is 998.2 kg/M³. Average specific gravity of particles is 2.65.
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What is the surface overflow rate in the sedimentation tank?
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- 20 m³/m²/day
- 40 m³/m²/day
- 67 m³/m²/day
- 133 m³/m²/day
Correct Option: A
| SOR = | = | = 20m³/m²/days | ||
| A | 20 × 10 |
