Table 1 Water quality parameters obtained from the grab samples collected from Seungki and Jungnang STPs
Water quality parameter | Seungki Sewage Treatment Plant | Jungnang Water Reclamation Center | |||||
|---|---|---|---|---|---|---|---|
SK RW | SK PE | SK FE | JN RW | JN PE | JN DSE | JN FE | |
pH | 8.1 ± 0.1 | 8.1 ± 0.2 | 7.9 ± 0.7 | 7.9 ± 0.3 | 7.9 ± 0.2 | 7.8 ± 0.2 | 7.8 ± 0.1 |
DO (mg/L) | 6.1 ± 2.2 | 6.2 ± 2.6 | 8.2 ± 1.0 | 7.2 ± 1.0 | 7.5 ± 1.6 | 8.5 ± 0.1 | 8.7 ± 0.1 |
SS (mg/L) | 68.3 ± 3.5 | 54.7 ± 6.4 | 29.3 ± 4.2 | 161.7 ± 26.2 | 41.3 ± 4.7 | 2.8 ± 0.4 | 1.9 ± 0.4 |
Alkalinity (mg/L CaCO3) | 154.1 ± 27.2 | 178.6 ± 70.4 | 99.4 ± 16.3 | 118.1 ± 1.8 | 126.4 ± 3.0 | 57.5 ± 9.4 | 59.1 ± 6.2 |
Hardness (mg/L CaCO3) | 201.7 ± 20.2 | 226.7 ± 25.2 | 170 ± 20 | 116.7 ± 28.9 | 126.7 ± 15.3 | 106.7 ± 5.8 | 105 ± 5 |
NH4-N (mg/L) | 26.0 ± 1.4 | 21.7 ± 0.2 | 9.2 ± 0.2 | 21.7 ± 0.3 | 21.0 ± 0.2 | 1.7 ± 0.0 | 1.2 ± 0.8 |
NO3-N (mg/L) | 16.1 ± 2.1 | 12.7 ± 1.1 | 8.6 ± 1.8 | 14.1 ± 1.0 | 13.8 ± 1.7 | 9.4 ± 1.4 | 6.4 ± 1.6 |
NO2-N (mg/L) | 2.5 ± 0.0 | 1.9 ± 0.8 | 1.8 ± 0.6 | 3.2 ± 0.4 | 2.7 ± 0.7 | 1.7 ± 0.1 | 1.1 ± 0.1 |
PO4-P (mg/L) | 3.9 ± 0.0 | 2.8 ± 0.1 | 0.9 ± 0.0 | 3.3 ± 0.0 | 1.9 ± 0.0 | 1.4 ± 0.1 | 0.60 ± 0.0 |