| Parameters | Awuah & Abrokwa (2008) | This Work | EPA guideline |
|
| FINAL EFFLUENT |
| |
| pH | 7.45 ± 0.14 | 8.04 ± 0.10 | 6-9 |
| Temperature (˚C) | - | 24.49 ± 1.99 | ˂30 |
| Conductivity (µS/Cm) | - | 1383 ± 428 | 1500 |
| Dissolved oxygen (mg/l) | 4.24 ± 1.08 | 1.76 ± 0.70 | - |
| Turbidity (NTU) | 122 ± 5e0.27 | 20.71 ± 7.0 | 75 |
| Total solids (mg/l) | 958 ± 93.78 | 260.3 ± 101 | 50 |
| COD (mg/l) | 146 ± 20.62 | 129.9 ± 53 | 250 |
| BOD (mg/l) | 23 ± 5.74 | 23.88 ± 4.50 | 50 |
| Oil and grease (mg/l) | - | 0.54 ± 0.5 | 5 |
| Colour (TCU) | - | 191.3 ± 46 | 200 |
| Ammonia-nitrogen (mg/l) | 2.6 ± 0.68 | 37.73 ± 4.14 | 1 |
| Nitrate-nitrogen (mg/l) | 22.1 ± 0.83 | 253.2 ± 35 | 50 |
| TKN (mg/l) | 43.1 ± 1.15 |
| - |
| Sulphate (mg/l) | - | 65.53 ± 5.45 | 200 |
| Phosphate-phosphorus | 0.5 ± 0.14 | 6.71 ± 0.63 | 2 |
| Faecal coliform MPN/100 ml) | 2.16 × 102 ± 16.31 | 3.78 × 102 ± 16.31 | 400 |