Table 3.
effect of vertical anoxic–aerobic continuous flow combined bioreactor and control reactor on naphthalene and COD concentration and their removal efficiency
| Naphthalene concentration | Naphthalene removal efficiency | COD | ||
|---|---|---|---|---|
| Anoxic/Oxic reactor | Control reactor | |||
| 0.5 mg/l | (%) | 66 | 27 | 78 |
| mg/l | 0.17 ± 0.6 | 0.365 ± 0.01 | 0.11 ± 4.2 | |
| 1 mg/l | (%) | 58.4 | 21.5 | 94 |
| mg/l | 0.416 ± 0.02 | 0.785 ± 0.05 | 0.06 ± 0.03 | |
| 5 mg/l | (%) | 51 | 26.5 | 90 |
| mg/l | 2.45 ± 1.5 | 3.675 ± 0.21 | 0.5 ± 0.6 | |
| 10 mg/l | (%) | 44.5 | 19.5 | 92 |
| mg/l | 5.55 ± 0.5 | 8.05 ± 2.15 | 0.8 ± 0.05 | |
| 20 mg/l | (%) | 32.5 | 17 | 89 |
| mg/l | 13.5 ± 4.50 | 16.6 ± 5.48 | 2.2 ± 1.35 | |