Parameters | CNHU-HKM | CHU-MEL | HIA-CHU | CHUZ SL | SIBEAU | Standards Benin/WHO | ||||
---|---|---|---|---|---|---|---|---|---|---|
I | O | I | O | FS | FS | FS | I | O | ||
pH | 7.05 | 7.08 | 7.00 | 7.34 | 7.17 | 7.05 | 7.66 | 7.65 | 7.45 | 6–9 |
T (°C) | 22.90 | 22.60 | 22.40 | 22.50 | 21.62 | 25.50 | 27.71 | 27.80 | 28.2 | ≤ 30 |
SS (mg/L) | 93.00 | 80.00 | 111.00 | 68.00 | 65.67 | 105.17 | 109.63 | 9256.0 | 8230.0 | ≤ 35a |
COD (mgO2/L) | 424.00 | 289.00 | 271.71 | 143.85 | 150.18 | 256.33 | 41.01 | 6452.0 | 5230.0 | ≤ 125 a |
BOD5 (mgO2/L) | 234.00 | 146.00 | 161.00 | 55.00 | 87.21 | 135.31 | 25.64 | 985.00 | 875.00 | ≤ 25 a |
DO (mg/L) | 0.69 | 3.51 | 3.70 | 4.20 | 0.69 | 1.19 | 1.55 | 1.08 | 1.76 | > 5 |
Am (mg/L) | 9.36 | 2.10 | 23.76 | 7.28 | 55.11 | 90.02 | 68.19 | 102.0 | 93.0 | < 0.2 |
PT (mg/L) | 17.9 | 12.16 | 29.06 | 26.77 | 42.83 | 55.98 | 31.87 | 875.0 | 805.0 | ≤ 10 |