Ultrafiltration

1. Description: Ultrafiltration (UF) is defined as a method of cross flow filtration, similar to reverse osmosis (RO) but with lower pressure, which uses a membrane to separate small colloidal particles and large water molecules and other liquids. It is situated between the IO and microfiltration; as far as the particles size to be eliminated is concerned, typically the UF filters particles between 0.002 and 0.1 microns (µm) and rejects organic compounds that have a molecular weight of more than 1,000 while it allows ions and organic compounds of lesser weight to pass. In a membrane-based wastewater treatment system, waste is initially transferred from several sources and drained into an equalization tank. Designed to be a "passive" tank, the equalization tank is typically of such a volume that the retention time is one day.

2. Design ranges: please, consult our Engineering Department.

     a. Major factors to be considered in the design:

          I. Flow.

          II. Temperature.

          III. Pressure.

         IV. Membrane types.

3. Applications: Ultrafiltration technology can be applied in different wastewater areas, it can even be very useful as a system for water purification for less polluted water. Each case is unique and requires a prior study of the influent.

4. Benefits:

     a. Quality of treated water (reuse).

     b. Stability. Quality of stable permeate regardless of load peaks.

     c. Disinfection.

     d. Minimum space requirement.

     e. Modularity.

     f. Minimum maintenance.