Ultrafiltration is a membrane filtration process that removes suspended solids, dissolved solids, bacteria, viruses, endotoxins and other pathogens to produce pure water with low TDS content.
Ultrafiltration uses hydrostatic pressure to force water through a semi-permeable membrane. Suspended solids and high molecular weight solutes are retained, while water and low molecular weight solutes pass though the membrane.
These membranes work with less pressure than reverse osmosis, since they are not able to retain TDS below 0.1 microns
(μm). They are very effective as a pretreatment for Reverse Osmosis.
Most common stages used in this technology: