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Q1.The results of a batch settlement analysis carried out on a mixed suspension are given in the following Table 1.
Plot the cumulative velocity profile of the suspended solids and compute the predicted removal rate by settlement.
| Number | Sample depth(m) | Sample time(h) | SS in sample (mg/l) | 
| 1,2,3 | 1,2,3 | 0 | 222(averaged) | 
| 4 | 1 | 1 | 140 | 
| 5 | 1 | 3 | 108 | 
| 6 | 1 | 6 | 80 | 
| 7 | 2 | 1 | 142 | 
| 8 | 2 | 3 | 110 | 
| 9 | 2 | 6 | 106 | 
| 10 | 3 | 1 | 142 | 
| 11 | 3 | 3 | 130 | 
| 12 | 3 | 6 | 124 | 
| 13 | 4 | 1 | 147 | 
| 14 | 4 | 3 | 126 | 
| 15 | 4 | 6 | 114 |