# Civil Engineering - Water Supply Engineering - Discussion

### Discussion :: Water Supply Engineering - Section 4 (Q.No.26)

26.

Normal values of overflow rate for plain sedimentation tank using coagulants, is

 [A]. 750 to 1000 litres/hr/m2 [B]. 1000 to 1250 litres/hr/m2 [C]. 1250 to 1500 litres/hr/m2 [D]. 1500 litres/hr/m2.

Explanation:

No answer description available for this question.

 Mayank said: (Nov 30, 2016) I think it should be 1250 -1500.

 Avi said: (Jun 20, 2018) 12000 - 18000 lit per day per m2.

 Hisham said: (Feb 20, 2020) 1000-1250 as per SK Garg.

 Jingusie said: (Mar 4, 2020) Type 1:- 12-18m^3 per day per m^2. Type 2:- 24-30m^3 per day per m^2.

 Besu said: (Jul 17, 2020) 12000-18000 lt/m2/day. So, the answer should be - 500-750 lt/m2/Hr.

 Zenu said: (Oct 20, 2020) Surface overflow rate for Plain sedimentation tank = 12000 to 18000 lit/day/m2. SOR for plain sedimentation with coagulation=24000 to 30000 lit/day/m2. Cover it to hours, we get 24000/24 lit/hr/m2= 1000. Similarly, for 30000/24 = 1250 lit/hr/m2.