Table 2.
Water analysis of three different samples
| S.No | Parameter | Control (untreated dairy effluent) | Dairy effluent after algal bead treatment | Dairy effluent after sand bed filtration | Acceptable limits as per APPCB |
|---|---|---|---|---|---|
| 1 |
BOD(3 @ 27°C) |
1200 mg/L |
146 mg/L |
32 mg/L |
<100 mg/L |
| 2 |
COD |
2900 mg/L |
448 mg/L |
106 mg/L |
<250 mg/L |
| 3 |
NH4+-N |
35 mg/L |
0.6 mg/L |
0.54 mg/L |
<50 mg/L |
| 4 |
Phosphates |
30 mg/L |
0.87 mg/L |
0.39 mg/L |
-- |
| 5 | pH | 6.5 | 8.01 | 8.52 | 5.5-9.0 |
Sampling and analysis were done as per standard methods prescribed by BIS.