Feature 3: Treatment of Oil-Contaminated Wastewater

POREFLON Microfiltration Membrane Module

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Feature 3: Treatment of Oil-Contaminated Wastewater

Sumitomo Electric's POREFLON Membrane Module products also have another excellent feature in that they offer superb performance in treating wastewater containing oil (oil-contaminated wastewater). The hollow fiber membrane in the POREFLON Membrane Module has a microstructure in which PTFE fibers are enmeshed in a three-dimensional way. The three-dimensional structure is effective in preventing oil from sticking tightly onto the membrane surface. Moreover, the hollow fiber membrane is highly resistant to alkali, chemical that is essential in removing oil deposits. Oil-contaminated wastewater has been regarded as being difficult to treat with a membrane. Because of two of the POREFLON Membrane Module's features—it is less prone to clogging and can be cleaned with alkali—this is no longer an issue; it is ideally suited to those applications.

Surface microstructure of POREFLON Membrane Module (before use)


Surface microstructure after filtration of oil-contaminated wastewater
A porous structure still remains in the areas indicated with dotted lines, allowing continued filtration.

The table below gives a concrete example of single-stage filtration incorporating the POREFLON Membrane Module used to remove oil content from wastewater, from 460 mg/L to 3.8 mg/L, or less than 1/100. Since it is highly regarded for its remarkable effectiveness in removing oil, the POREFLON Membrane Module is being used to treat oil field produced water, wastewater from petrochemical plants, and wastewater from cold rolling in steelworks.

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