Table 1: The characteristics of studied of dairy wastewater before and after treatment.
| Parameter | Dairy effluent | Fungal stage | Bacterial stage | Concentration chitosan 3g/700 ml | |||
| 0.5 | 1 | 1.5 | 3 | ||||
| pH | 5.73 | 6.48 | 5.38 | 6.39 | 6.42 | 6.55 | 6.58 |
| Colour | Milky White | Light green | Faint green | Semi clear | Semi clear | Semi clear | Semi clear |
| COD (mg/l) | 3900 ± 317.4 | 1200 ± 1.89 × 102 | 1500 ± 2.54 × 102 | 716 ± 0.15 × 102 | 630 ± 0.2 × 102 | 490 ± 0.36 × 102 | 423 ± 0.251 × 102 |
| Turbidity (NTU) | 350 ± 25.1 | 120 ± 0.15 × 102 | 97 ± 0.107 × 102 | 76 ± 0.035 × 102 | 66 ± 0.035 × 102 | 45 ± 0.035 × 102 | 27 ± 0.025 × 102 |
| BOD (mg/l) | 1300 ± 80.8 | 136 ± 0.32 × 102 | 200 ± 0.36 × 102 | 89 ± 0.015 × 102 | 76 ± 0.047 × 102 | 57 ± 0.025 × 102 | 44 ± 0.04 × 102 |
| TSS (mg/l) | 791 ± 9.0 | 400 ± 1 × 102 | 490 ± 0.95 × 102 | 195 ± 0.05 × 102 | 150 ± 0.036 × 102 | 132 ± 0.025 × 102 | 109 ± 0.01 × 102 |
| NH4 (mg/l) | 37 ± 2.08 | - | - | 13.8 ± 0.076 × 102 | 11 ± 0.01 × 102 | 8.6 ± 0.76 × 102 | 2.7 ± 0.25 × 102 |