The normal values of over flow rates for sedimentation tanks using coagulent, ranges between

• A. 25, 000 to 35, 000 litres/sqm/day
• B. 40, 000 to 50, 000 litres/sqm/day
• C. 50, 000 to 60, 000 litres/sqm/day
• D. 80, 000 to 100, 000 litres/sqm/day