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Physicochemical analysis for real tannery wastewater samples.
| Parameters | Sample 1 | Sample 2 |
|---|---|---|
| pH | 8.4 | 8.9 |
| Chemical oxygen demand (COD) (mg/L) | 7560 | 7140 |
| Biological oxygen demand (BOD) (mg/L) | 5950 | 6050 |
| Chromium (mg/L) | 817 | 1170 |
| SO42− (mg/L) | 1826 | 2425 |
| Cl− (mg/L) | 3014 | 4768 |
| Ammonia nitrogen (mg/L) | 50 | 48 |
| Phosphorous (mg/L) | 61 | 58 |
| Total suspended solids (TSS) (mg/L) | 2930 | 3650 |
