Q. The normal value of over flow rates for plain primary sedimentation tanks, ranges between (Solved)
1. 25,000 to 35,000 litres/sqm/day
2. 40,000 to 50,000 litres/sqm/day
3. 50,000 to 60,000 litres/sqm/day
4. 80,000 to 100,000 litres/sqm/day
- b. 40,000 to 50,000 litres/sqm/day