Table 1.
Water quality of the WWTP effluent used as influent.
| Phase | Operational Day (d) | pH | NO3-N (mg/L) | NO2-N (mg/L) | NH4+-N (mg/L) | TN (mg/L) | COD * (mg/L) |
|---|---|---|---|---|---|---|---|
| I | 0–30 | 7.2–7.9 | 4.7 ± 2.6 | 0.6 ± 0.2 | 0.7 ± 0.2 | 8.7 ± 5.2 | 52.2 ± 25.3 |
| II | 31–50 | 7.1–7.8 | 6.4 ± 2.5 | 0.8 ± 0.4 | 1.4 ± 0.5 | 11.0 ± 3.0 | 68.9 ± 9.0 |
| III | 51–70 | 7.1–7.8 | 6.4 ± 2.5 | 0.8 ± 0.4 | 1.4 ± 0.5 | 11.0 ± 3.0 | 68.9 ± 9.0 |
| IV | 71–90 | 7.2–7.9 | 5.1 ± 2.4 | 0.7 ± 0.2 | 0.9 ± 0.6 | 8.9 ± 4.8 | 52.2 ± 25.3 |
* COD is the corresponding value of 6.7 CODadded/NO3−-N achieved by methanol addition.