Site (N = 6) | Kakoba sewage | Taso sewage | Student t test | Standards | |||||||
Parameters | Range | Mean | CV (%) | Range | Mean | CV (%) | T | P | [13] | [16] | [12] |
Temperature (˚C) | 21.10 - 34.1 | 25.05 | 18.36 | 21.30 - 34.0 | 29.02 | 15.14 | 1.528 | 0.158 | 25 | - | 20 - 35 |
Colour (TCUs) | 1319 - 1882 | 1627.67 | 14.67 | 995 - 1746 | 1414.33 | 20.62 | 1.386 | 0.196 | 20 - 150 | 500 | 300 |
TSS (mg/l) | 167 - 249 | 214 | 13.08 | 118 - 351 | 182.5 | 48.39 | 0.833 | 0.424 | 50 | 100 | 100 |
Turbidity (NTUs) | 104.5 - 256.0 | 186.63 | 29.75 | 138 - 371.5 | 261.83 | 33.62 | 1.77 | 0.107 | - | 300 | 300 |
pH | 7.77 - 8.46 | 8.16 | 3.3 | 7.73 - 8.90 | 8.26 | 5.3 | 0.485 | 0.638 | 5.5 - 9.0 | 6.0 - 8.0 | 6.0 - 8.0 |
Alkalinity (mg/l) | 300 - 2911 | 1390.17 | 85.6 | 310 - 2400 | 1308.33 | 66.07 | 0.473 | 0.647 | 400 | 800 | - |
EC (µs/cm) | 824 - 1195 | 1021.17 | 17.01 | 489 - 1102 | 816 | 31.56 | 1.618 | 0.137 | 1000 | 1500 | |
DO (mg/l) | 50 - 82.70 | 63.03 | 21.97 | 48.9 - 89.4 | 68.27 | 20.56 | 0.65 | 0.53 | 5 | - | 5 |
Hardness, CaCO3 (mg/l) | 191 - 4500 | 1591.00 | 109.26 | 827 - 1220 | 981.33 | 15.77 | 0.856 | 0.412 | - | - | - |
Mg (mg/l) | 41.2 - 608 | 243.29 | 92.13 | 175.1 - 299.1 | 246.49 | 21.5 | 0.034 | 0.974 | - | - | 100 |
Fe (mg/l) | 0.81 - 1.46 | 1.13 | 22.8 | 0.70 - 1.75 | 1 | 38.02 | 0.691 | 0.505 | 0.2 - 2.0 | - | 10 |
PO4 (mg/l) | 18.32 - 35.10 | 27.11 | 28.25 | 21.63 - 38.75 | 32.2 | 18.66 | 1.279 | 0.23 | 0.5 - 0.7 | - | 10 |
NO3 (mg/l) | 0 - 25 | 10 | 122.47 | 0 - 25 | 5.83 | 174.96 | 0.64 | 0.536 | 50 | 5 | - |
NH4 (mg/l) | 356 - 400 | 385.33 | 5.9 | 0 - 60 | 50 | 48.99 | 24.585 | 2.83E−10 | 0.2 - 4 | - | - |
Cl (mg/l) | 0 - 1000 | 833.33 | 48.99 | 0 | 0 | 0 | 5 | 0.001 | 250 | 500 | 500 |