Table 1 Key average parameters of two full-scale step feed (SF) WWTPs
Parameter | SF1 | SF2 |
|---|---|---|
Avg. flow rate (m3 d− 1) | 84,000 ± 5000 | 433,820 ± 8000 |
SRT (d) | > 60 | 7 ± 1 |
HRT (h) | 4.1 (avg.) | 4.5 (avg.) |
Anoxic | 1.8 ± 0.5 | 0.7 ± 0.5 |
Aerobic | 2.3 ± 1.5 | 3.8 ± 1.2 |
DO (mg L− 1) | ||
Anoxic | 0.2 ± 0.3 | 0.6 ± 0.5 |
Aerobic | 0.9 ± 0.5 | 1.8 ± 0.5 |