Ultra filtration ( 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 (10^3 – 10^6 Da) solutions, especially protein solutions. Ultra filtration is not fundamentally different from reverse osmosis , micro filtration or nano filtration , except in terms of the size of the molecules it retains.
To meet critical discharge criteria,Hydrolink Technologies Limited Supplies and installs ultrafiltration systems which remove the need for clarifiers and multi-media filters. Effective ultrafiltration systems use membranes that can be immersed, back-flushable, and air scoured. Spiral wound UF/MF membranes offer excellent performance for the clarification of process water and waste water
Ultrafiltration Systems provide the following advantages
- Superior filtration performance with high flux
- Very small nominal pore diameter (0.03 µm)
- Efficiently removes bacteria and viruses
- Occasionally back washed and air scoured to boost performance and removing the fouling layer to extend operating life
- Low fouling membrane modules
- UF Outside-In or Inside-Out Configuration permits reduced plugging and higher solids loading
- Basic, vertical, modular design permits low cost, compact systems
- Effective membrane cleaning has a high chemical resistance and temperature tolerance
