|
Comparison Chart |
Reverse Osmosis |
Nano Filtration |
|
Filtration level (micron) |
0.0001 to 0.001 |
0.0008 to 0.01 |
|
Size of viruses (micron) |
0.005 to 0.01 |
0.005 to 0.01 |
|
Size of bacteria (micron) |
0.2 to 10 |
0.2 to 10 |
|
Filtration of viruses and bacteria |
YES |
YES |
|
Typical recovery (%) |
50% |
75% |
|
Typical TDS reduction (%) |
98 |
70 |
|
Typical points of pH reduction |
2+ |
Less than 1 |
|
Need for pH correction of permeate |
Yes, 50% of time |
No, 90% of time |
|
Residual water hardness (grains) |
0 |
1 |
|
Maximum raw TDS without special design considerations
(PPM) |
2,000 |
1,500 |
|
Average high pressure (PSI) |
150 |
90 |
