Table 2.
One-way Analysis of Variance for Water Quality in Raw Dairy Industry Effluent, Without and With microbial consortium in Sludge Activation. Values are presented as mean ± SE (n = 3); different letters in each row indicate significant differences (p ≤ 0.05) based on the Student Newman-Keuls Test.
| Without microbial consortium treatment |
With microbial consortium treatment |
|||||||
|---|---|---|---|---|---|---|---|---|
| Parameters | Tap water | Raw effluent | Aerator tank effluent | sedimentation tank effluent | Filter effluent | Aerator tank effluent | sedimentation tank effluent | Filter effluent |
| pH | 7.11 ± 0.03 | 6.83 ± 0.02a | 8.33 ± 0.02e | 8.39 ± 0.01e | 8.18 ± 0.05b | 7.73 ± 0.09c | 6.86 ± 0.02a | 7.47 ± 0.01d |
| DO(ppm) | 5.40 ± 0.07 | 3.50 ± 0.3d | 2.53 ± 0.08bc | 2.53 ± 0.10bc | 2.05 ± 0.02a | 2.40 ± 0.07b | 2.90±0c | 4.50±0e |
| Salinity(ppt) | 0.13 ± 0 | 2.35 ± 0.06b | 2.67±0d | 2.66±0d | 2.57 ± 0.01c | 3.02 ± 0.01e | 3.16 ± 0.01f | 0.97 ± 0.01a |
| EC(mS cm−1) | 0.18 ± 0 | 3.25±0d | 2.68 ± 0.02c | 2.71 ± 0.01c | 2.38±0b | 3.75 ± 0.01f | 3.35 ± 0.01e | 1.26±0a |
| TDS(ppm) | 0.09 ± 0 | 1.75±0d | 1.65±0c | 1.65±0c | 1.34±0b | 1.85±0e | 1.92 ± 0.01f | 0.66±0a |
| Turbidity(NTU) | 0.00 ± 0 | 84.67 ± 0.4e | 39.33 ± 1.08d | 27.33 ± 0.4c | 10±0b | 87 ± 0.7f | 26.33 ± 0.4c | 2.07 ± 0.04a |
| Acidity(mg/l) | 0.21 ± 0.01 | 1.10 ± 0.15c | 0.43 ± 0.01b | 0.46 ± 0.01b | 1 ±0a | 1.83 ± 0.08e | 1.39 ± 0.08d | 0.5±0a |
| Alkalinity(mg/l) | 1.07 ± 0.08 | 4.13 ± 0.08d | 3.80 ± 0.14c | 3.73 ± 0.08c | 2.60 ± 0.14b | 5.17 ± 0.04f | 4.67 ± 0.08e | 1.40 ± 0.14a |
| Hardness(mg/l) | 10.00 ± 0 | 52.67 ± 0.40f | 37.67 ± 0.4e | 21.67 ± 0.40c | 13.33 ± 0.8b | 32.33 ± 0.81d | 21±0c | 5.33 ± 0.40a |
| Calcium (mg/l) | 2.38 ± 1.63 | 8.68 ± 0.82b | 12.02±0c | 20.16 ± 0.14d | 48.09±0e | 85.50 ± 1.63f | 84.16±0f | 4.08±0a |
| Magnesium(mg/l) | 4.23 ± 0.09 | 50.43 ± 0.76f | 34.74 ± 0.4e | 16.71 ± 0.40d | 2.31±0b | 11.55 ± 0.70c | 0.54±0a | 2.70 ± 0.09b |
| Nitrogen(mg/l) | 14.66 ± 0 | 102.60±0b | 706.66±0f | 130.66±0c | 906.00±0g | 208.89 ± 5.44e | 165.33 ± 1.22d | 80±0a |
| Sulfate(mg/l) | 5.37 ± 0 | 225.37±0f | 8.95±0a | 111.94±0d | 129.85±0e | 102.98±0c | 101.49±0c | 46.71±0b |
| Phosphate(mg/l) | 10.79 ± 1.3 | 529.12 ± 9.05f | 241.30±0d | 163.00±0c | 508.69±0b | 273.91±0e | 280.60 ± 4.09e | 76.46 ± 2.89a |
| BOD(mg/l) | 2.27 ± 0.04 | 64.3 ± 0.26f | 14.7 ± 0.16a | 15.0 ± 0.07a | 20.7 ± 0.04b | 14.0 ± 0.07a | 18.0±0ab | 14.3 ± 0.04a |
| COD(mg/l) | 80.00 ± 0 | 290±0g | 120±0e | 113.33 ± 2.04d | 108±0b | 140±0f | 110±0c | 52±0a |