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Conventional ABR operating conditions.
| Stage | Stage I | Stage II | Stage III | Stage IV |
|---|---|---|---|---|
| Days | 1–24 | 25–58 | 59–137 | 138–172 |
| Temperature (°C) | 30.4 ± 0.15 | 28.4 ± 0.16 | 18.0 ± 0.4 | 10.1 ± 0.4 |
| pH | 11.5 | 11.5 | 11.5 | 11.5 |
| HRT (d) | 2 | 2 | 1.5 | 0.75 |
| COD (mg/L) | 3139 ± 1559 | 10424 ± 1848 | 6199 ± 2685 | 5617 ± 636 |
| OLR (kg COD/(m3d)) | 1.37 ± 0.76 | 4.16 ± 0.65 | 17.98 ± 4.22 | 10.1 ± 2.25 |
