Table 4.
The mean absolute relative deviations (MARD) values for model predictions of COD and OUR process rates in the OUR batch tests that were carried out with the settled wastewater without pretreatment and after C–F from Wschod WWTP.
| Experiment | Study Period | Process Rate | MARD [%] | |||
|---|---|---|---|---|---|---|
| Wschod WWTP | ||||||
| Settled Wastewater | Settled Wastewater (C–F) | |||||
| ASM2d | Modified ASM2d | ASM2d | Modified ASM2d | |||
| OUR batch test | Winter | Oxygen uptake | 29.5 | 14.6 | 45.8 | 30.3 |
| COD utilization | 4.3 | 3.8 | 5.0 | 3.1 | ||
| Summer | Oxygen uptake | 11.3 | 9.7 | 18.9 | 11.8 | |
| COD utilization | 4.8 | 5.5 | 5.2 | 5.4 | ||
| Spring | Oxygen uptake | 16.2 | 15.8 | 23.3 | 19.2 | |
| COD utilization | 4.3 | 2.7 | 4.4 | 4.5 | ||