Membrane system
Mirco Filtration »
Watertec Membrane Systems has maintained a leadership role in supplying highly innovative Microfiltration (MF) technology and membrane solutions to a world market for decades.
MF is a low pressure (10-100 psig) process for separating larger size solutes from aqueous solutions by means of a semi-permeable membrane. This process is carried out by having a process solution flow along a membrane surface under pressure. Retained solutes (such as particulate matter) leave with the flowing process stream and do not accumulate on the membrane surface.
• Retains large suspended solids
• Passes some suspended solids and all dissolved material
• Pore ranges from 0.1 micron to 3 micron
Microfiltration products are designed for cross-flow separation, where a feed stream is introduced into the membrane element under pressure and passed over the membrane surface in a controlled flow path. A portion of the feed passes through the membrane and is called permeate. The rejected materials are flushed away in a stream called the concentrate. Cross-flow membrane filtration uses a high cross flow rates to enhance permeate passage and reduce membrane fouling.

Watertec cross-flow membrane filtration controls the effect of concentration polarization and the gel layer. It provides the most rapid, and hence economic, continuous membrane filtration.

Applications include wastewater treatment, caustic cleaner recovery and clarification of dark juices. For example, in the clarification of wine and dark juices (such as cranberry), MF is employed to separate the suspended solids from the juice to produce a low turbidity juice while allowing the passage of color and flavor.
Examples of MF Applications
Application Permeate Concentrate(Retentate) Benefits of MF
Cranberry juice clarification Low turbidity, clear juice Juice, suspended solids, colloidal haze particles.
Removes suspended solids and turbidity while allowing the passage of color, sugar and taste.
Wine filtration Low turbidity, clear, flavorful wine Wine, suspended solids, colloidal haze particles.
Removes suspended solids and turbidity while allowing the passage of color, alcohol and taste.
Industrial Waste Water Treatment Water & dissolved solids Water, suspended solids, insoluble metal hydroxide solids.
Removes suspended solids and insoluble metal hydroxide solids from wastewater to allow the permeate to be discharged to a local POTW.
Fermentation broth clarification Water & dissolved solids Water & suspended solids
Removes suspended solids from the fermentation broth leaving clarified liquid.
Water Softened water Hard water
Potable water production. Softened water reduces scaling on equipment and heat exchange surfaces
Antibiotics Salty waste product Desalted, concentrated Antibiotics
NF produces high value pharmaceutical products
 
 
 
 
 
 
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