TABLE 2.
Operational parameters for phase I to V.
| Phases | Time (d) | DO (mg L−1) | HRT(h) | Inf. pH | Inf. NH4-N |
|---|---|---|---|---|---|
| I (precultivation and starvation) | 1–18 | >6 | — | — | |
| II (ammonia oxidation rate) | 19–33 | 0.70 ± 0.30 | 6 | 8.3 ± 0.1 | 60 ± 3 mg L−1 |
| III (pH) | 34–43 | 0.70 ± 0.30 | 4 | 8.3 ± 0.1 | 40 ± 3 mg L−1 |
| 44–55 | 0.70 ± 0.30 | 4 | 7.5 ± 0.1 | 40 ± 3 mg L−1 | |
| 56–66 | 0.70 ± 0.30 | 4 | 6.8 ± 0.1 | 40 ± 3 mg L−1 | |
| 67–83 | 0.70 ± 0.30 | 4 | 7.5 ± 0.1 | 40 ± 3 mg L−1 | |
| IV (NH4-N) | 84–89 | 0.70 ± 0.30 | 4 | 7.5 ± 0.1 | 40 ± 3 mg L−1 |
| 90–111 | 0.70 ± 0.30 | 2 | 7.5 ± 0.1 | 20 ± 3 mg L−1 | |
| 112–115 | 0.70 ± 0.30 | 4 | 7.5 ± 0.1 | 40 ± 3 mg L−1 | |
| V (DO) | 116–151 | 1.70 ± 0.30 | 2.6 | 7.5 ± 0.1 | 40 ± 3 mg L−1 |