| Physico-chemical characteristics |
Untreated water |
Treated water |
Tolerance limit# |
| Colour |
Dark yellow |
Light pale |
- |
| Odor |
Ammonical |
Reduced |
- |
| pH |
8.1 |
7.5 |
5.5-9.0 |
| Turbidity (NTU) |
50 |
34 |
- |
| Total dissolved solids* |
2389 |
1869 |
2100.0 |
| Total suspended solids* |
346.0 |
179 |
200.0
|
| Alkalinity (CaCO3) |
273.0 |
138 |
- |
| Dissolved oxygen* |
12 |
17 |
- |
| Biological oxygen demand* |
36.0 |
14 |
30.0 |
| Chemical oxygen demand* |
280.0 |
64 |
250.0 |
| Organic carbon˟ |
180.0 |
129 |
- |
| Ammonical nitrogen˟ |
58.0 |
43.7 |
50.0 |
| ˟Fe2+ |
5.0 |
2.8 |
3.0 |
| ˟Cu2+ |
6.0 |
2.5 |
3.0 |
| ˟Pb2+ |
2.0 |
0.6 |
1.0 |
| ˟Ca2+ |
249.52 |
84 |
75 |
| ˟Mg2+ |
106.64 |
42.9 |
50 |
# Tolerance limits are listed according to the ISI Standards; *Values are in mgL-1 unit;
* Values are in ppm unit.
|
