membranes

Ultrafiltration, Nanofiltration and Reverse Osmosis

Ultrafiltration, Nanofiltration and Reverse Osmosis

An ultrafiltration filter has a pore size around 0.01 micron. A microfiltration filter has a pore size around 0.1 micron, so when water undergoes microfiltration, many microorganisms are removed, but viruses remain in the water. Ultrafiltration would remove these larger particles, and may remove some viruses.