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.