Ultrafiltration (UF) is a variety of membrane filtration in which hydrostatic pressure forces a liquid against a semipermeable membrane.
Suspended solids and solutes of high molecular weight are retained, while water and low molecular weight solutes pass through the membrane.
This separation process is used in industry and research for purifying and concentrating macromolecular (103 - 106 Da) solutions, especially protein solutions. Ultrafiltration is not fundamentally different from microfiltration, nanofiltration or reverse osmosis, except in terms of the size of the molecules it retains.
  • Absolute barrier for bacteria, virus and parasites.
  • Bacteria removal > 98%
  • R.O. pretreatment
  • Pilot plant available for tests
  • Low operating effort: our UF systems are fully automated.
  • Low filtration pressure required and low energy consumption
  • No chemicals added to the water
  • Clear and safe filtrate quality independent of fluctuations in raw water quality.


The membranes


The membrane technology used by Idrosistem energy combines seven individual capillaries in a highly robust fiber, an arrangement that significantly increases its stability and eliminates the risk of fiber breakage.  Also, membranes feature excellent antifouling properties, high chemical resistance and very high pH tolerance (pH 1-13).  In addition, membrane technology provides a secure barrier against suspended solids, bacteria, viruses and other microorganisms and supplies a consistently high level of filtrate quality, even in cases where the composition of the original water varies. That makes it a superb option as a preliminary stage for reverse osmosis, a field in which ultrafiltration is now the state-of-the-art technology.

There are different types of membranes that can be chosen according to the quality of the source of water, in particular the concentration of solids in water. For example, the universal membrane with a 0.9 mm capillary diameter is suitable for use with a broad range of source water compositions and the heavy-duty membrane with a 1.5 mm capillary diameter is a good choice for situations where the solids concentration is high, such as backwashing water for conventional filters or two-stage UF systems.