| Byproduct depth | Dissolved P | P Removal |
| cm | mg∙L−1 | % |
| Dust Only | ||
| 4 | 30.35 | -- |
| Iron Filter Cake (RM) | ||
| 4 | 0.32 | 98.9 |
| 8 | 0.30 | 99.0 |
| 12 | 0.48 | 98.4 |
| Alum Sludge (WT) | ||
| 4 | 3.34 | 89.0 |
| 8 | 1.21 | 96.0 |
| 12 | 1.44 | 95.3 |