| Parameter/Concentration |
Run-1 |
Run-2 |
Run-3 |
Run-4 |
Run-5 |
| Feed water: |
|
|
|
|
|
| pH |
8.06 |
8.19 |
8.5 |
8.92 |
7.7 |
| EC (µS/cm) |
3380 |
3390 |
3720 |
3820 |
3950 |
| Concentration -TDS (ppm) |
2028 |
2034 |
2232 |
2292 |
2370 |
| Volume of water (L) |
5 |
3.9 |
3.1 |
2.54 |
2.35 |
| Temperature (°C) |
22 |
23 |
23 |
23 |
23 |
| Permeate water: |
|
|
|
|
|
| Flow rate(L/min) |
0.21 |
0.18 |
0.15 |
0.13 |
0.13 |
| Temperature (°C) |
23.7 |
24.1 |
23.3 |
19.1 |
21.7 |
| pH |
8.5 |
7.29 |
8 |
6.18 |
7.85 |
| EC (µS/cm) |
150.4 |
311 |
513 |
613 |
819 |
| TDS (ppm) |
90.24 |
186.6 |
307.8 |
367.8 |
491.4 |
| Chloride (ppm) |
36.86 |
65.23 |
106.35 |
141.8 |
170.16 |
| Fluoride (ppm) |
0.044 |
0.0928 |
0.129 |
0.158 |
0.331 |
| Hardness (ppm) |
28 |
24 |
27 |
40 |
48 |
| Calcium (ppm) |
2 |
4 |
8 |
8 |
20 |
| Magnesium (ppm) |
2 |
4 |
4 |
8 |
8 |
| Alkalinity (ppm) |
20 |
16 |
20 |
32 |
40 |
| Iron (ppm) |
0.31 |
0.32 |
0.28 |
0.3 |
0.35 |
| Sulphate (ppm) |
2.38 |
3.21 |
5.11 |
5.35 |
2.94 |
| Turbidity NTU |
0.56 |
0.41 |
0.39 |
0.4 |
0.4 |
| Water collected (lit.) |
1.1 |
0.8 |
0.56 |
0.35 |
0.35 |
| % salt rejection |
95.51 |
90 |
86.2 |
83.95 |
79.26 |
| %Recovery |
32.82 |
28.12 |
23.44 |
20.31 |
20.31 |
| Flux (L/m2min) |
2.1 |
1.8 |
1.5 |
1.3 |
1.3 |
| Membrane permeate: |
|
|
|
|
|
| Flow rate(l/min) |
0.57 |
0.56 |
0.56 |
0.56 |
0.57 |
| EC (µS/cm) |
3390 |
3720 |
3820 |
3950 |
4030 |
| TDS (ppm) |
2034 |
2232 |
2292 |
2370 |
2418 |
| pH |
8.19 |
8.5 |
8.92 |
7.7 |
7.75 |
| Temperature( °C) |
23.1 |
23 |
23.5 |
20.5 |
23 |
| Water collected (lit.) |
3.9 |
3.1 |
2.54 |
2.35 |
2 |
|
