The flow through a sedimentation tank was studied by injecting a pulse of dye tracer in...

The flow through a sedimentation tank was studied by injecting a pulse of dye tracer in the influent. The con-centration of the dye in the effluent at time intervals of 15 min and 30 min starting from injection of the tracer input are listed in the following table.

Draw a residence time distribution curve as shown in Figure 7-7b and locate the mean residence time (centroid).