(a) Two primary settling basings are 25 m in diameter with 2.5 m side…

Question

(a) Two primary settling basings are 25 m in diameter with 2.5 m side water depth. Single effluent weirs are located on the peripheries of the tanks.

For a water flow of 30000 cubic meter/day, calculate :

(i) surface area and volume

(ii) overflow rate in cubic meter/sq m/day

(iii) detention time, in hours.

(b) Explain in brief various forms of chlorination.