Ultrafiltration units separate the components of a fluid based on molecular size. Wastewater is first collected in an equalization tank for removal of free-floating oils and settled solids. The remaining water is then transferred to a batch tank to be pumped and re-circulated through the ultrafiltration membranes. The membranes consist of a thin film lining the inside of a tube. The membrane allows water and some solutes, like salt, to pass through while oil and grease are rejected. The permeate is discharged, while the wastewater continues to be concentrated by pumping through more membranes.
Operation usually occurs at 20-70 PSIG, meaning the wastewater moves through the small membrane tubes at high speed. This speed keeps the surface of the membrane film clean.
Ultrafiltration units are not only effective at treating wastewater, but can also be used to clarify liquids such as juices. This process works much the same way as wastewater treatment, as the water permeates the membrane, while the concentrated juice remains.
Ultrafiltration units are highly customizable, depending on the fluid to be treated. Considerations when selecting ultrafiltration unit include fluid flow rate and the type and level of contamination.
MLE Equipment uses Filter Innovations’ line of ultrafiltration units. Please see the provided specification sheets and manuals for more detailed information on ultrafiltration units.
