Table 1 Summary of conditions used during operation of the EGSB reactor treating EG
Phase | Time (days) | OLR (kg/m3/day) | Recycle rate (L/h) | CODin (mg/L) | pHin | Trace nutrients (ml/L) | NaHCO3 (mg/L) |
|---|---|---|---|---|---|---|---|
1 | 0–14 | 2.1 ± 0.1 | 25 | 523 ± 35 | 7.56 ± 0.28 | 7.50 | 200 |
2 | 15–23 | 4.5 ± 0.1 | 25 | 1121 ± 36 | 7.51 ± 0.24 | 7.50 | 400 |
3 | 24–35 | 9.8 ± 0.3 | 25 | 2453 ± 64 | 8.11 ± 0.25 | 7.50 | 880 |
4 | 36–37 | 12.0 ± 0.0 | 25 | 3004 ± 0 | 8.12 ± 0.00 | 7.50 | 1200 |
5 | 38–50 | 14.6 ± 0.3 | 25 | 3640 ± 87 | 8.02 ± 0.30 | 7.50 | 1400 |
6 | 51–58 | 13.4 ± 0.7 | 20 | 3360 ± 183 | 8.22 ± 0.29 | 7.50 | 1400 |
7 | 59–75 | 13.2 ± 2.7 | 20 | 3304 ± 686 | 8.16 ± 0.25 | 3.75 | 1400 |
8 | 76–98 | 15.2 ± 0.7 | 15 | 3807 ± 176 | 7.84 ± 0.27 | 3.75 | 1000 |
9 | 99–109 | 15.0 ± 1.2 | 15 | 3743 ± 289 | 7.62 ± 0.15 | 3.75 | 800 |
10 | 110–129 | 14.0 ± 1.0 | 15 | 3497 ± 256 | 7.79 ± 0.21 | 3.75 | 600 |
11 | 130–149 | 14.0 ± 0.2 | 15 | 3503 ± 46 | 7.89 ± 0.23 | 0 | 600 |
12 | 150–168 | 13.1 ± 1.0 | 15 | 3283 ± 261 | 7.68 ± 0.17 | 0 | 400 |