Q. 1. A sedimentation basin is to be designed so that it will remove 100% of all particles which have a settling velocity of 0.3 mm/s.
(a) For a flow of 10 m3/min, determine appropriate dimensions for a rectangular basin in which the length is 4 times the width.
(b) Determine the total weir length required.
Show in sketches.
Q. 2. Describe the effect you would expect with regard to solids removal if the basin of the Prob. Q. 1 was kept at a detention time of 2 h but made only half as deep. Why would this effect occur? What other factors might influence your choice of basin depth?