Table 1 The main information of 8 WWTPs
TNQ-1 | TNQ-2 | XBQ-1 | XBQ-2 | XBQ-3 | WJQ-1 | JTQ-1 | LYS-1 | |
|---|---|---|---|---|---|---|---|---|
Treatment process | SBR process | SBR process | A2O | A/O | A2O | A/O | A2O | A2O |
Average water intake (m3/d) | 15,000 | 25,000 | 160,000 | 3000 | 80,000 | 25,000 | 35,000 | 70,000 |
People (million) | 0.08 | 0.30 | 0.30 | 0.01 | 0.15 | 0.13 | 0.25 | 0.65 |
Influent characteristics | ||||||||
COD (mg/L) | 1123 | 780 | 255 | 1185 | 260 | 971 | 265 | 247 |
N (mg/L) | 21.46 | 18.74 | 36.1 | 88 | 31.54 | 12.3 | 35 | 39.62 |
P (mg/L) | 4.65 | 2.08 | 4.41 | – | 4.46 | 3.02 | 3.42 | 6.95 |
NH4 (mg/L) | 21.46 | 18.74 | 23 | 88 | 27.3 | 12.3 | 30 | 28 |
Effluent characteristics | ||||||||
COD (mg/L) | 178 | 150 | 41 | 51.3 | 32.8 | 60 | 33 | 41 |
N (mg/L) | 5.43 | 4.17 | 8.78 | 24.7 | 8.26 | 2 | 10.89 | 8.83 |
P (mg/L) | 1.69 | 0.95 | 0.15 | – | 0.11 | 0.49 | 0.25 | 0.17 |
NH4 (mg/L) | 5.43 | 4.17 | 2 | 24.7 | 2 | 2 | 2 | 2 |