Table 3.
Overall average (±SD) inlet and outlet concentrations (in mg l− 1 except for temperature and pH) and average percentage removal (%R) of wastewater constituents. Minimum and maximum values are indicated in brackets
| Parameter | Inlet | Outlet | |||
|---|---|---|---|---|---|
| Control | %R | HUs | %R | ||
| TKN | 33.29 ± 3.13 (19–43) | 19.77 ± 1.87 (11–25) | 41 | 10.14 ± 3.99 (5.38–17.67) | 69 |
| NH4+ − N | 24 ± 1.63 (18–31) | 18 ± 1.09 (14–23) | 25 | 11.15 ± 0.69 (10.40–12.33) | 54 |
| NO3− - N | 13 ± 3.12 (8.70–17) | 9.64 ± 2.52 (6.70–13) | 26 | 6.4 ± 1.91 (4.30–9) | 51 |
| PO43− - P | 14.86 ± 5 (8–23) | 9.87 ± 2.57 (6.40–14) | 34 | 6.26 ± 2.74 (3.44–10.80) | 58 |
| DO | 0.83 ± 0.39 (0.3–1.4) | 0.03 ± 0.05 (0–0.1) | – | 0.02 ± 0.03 (0–0.07) | – |
| pH | 6.4 ± 1.02 (4.8–7.8) | 7.6 ± 0.64 (6.8–8.7) | – | 8.1 ± 0.17 (8–8.3) | – |
| T(°C) | 31.57 ± 4.72 (26–40) | 20.29 ± 1.50 (18–22) | – | 19.97 ± 0.86 (19.14–20.86) | – |