Microfiltration / Ultrafiltration Membrane Module

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POREFLON Membrane Modules are durable high-quality membranes that have chemical and thermal resistance.
These modules are reasonably priced and easy to handle.

POREFLON Membrane Module

The POREFLON hollow fibers used as the filtration membrane have a composite structure, with a dense filtration layer on the outside and a supporting structure on the inside. This double structure offers the filtration accuracy by the outer layer, while the inner layer provides strength and durability. This structure enables advances water treatment capability for a variety of applications.

POREFLON hollow fiber membrane with high strength, and high flow rate (patent registered in Japan, China and the U.S.)
Sumitomo Electric POREFLON

Features of POREFLON Membrane Module

  • Chemical resistance
    (Flow recovery)
    The module can be cleaned with various chemicals from pH 0 to 14 including high-concentration alkalis, with excellent flow recovery.
    DATA 1
  • Thermal resistance
    Membrane filtration applications are possible at temperatures up to 200°C (392°F). It is also suitable for treating oil-contaminated wastewater.
  • Durability
    The hollow fiber membrane with high tensile strength is durable against shaking and flexing, and can be used for an extended period of time.
    DATA 1 DATA 2
  • Permeability
    The high porosity ensures high permeability and offers excellent water treatment capability.
    DATA 1
  • Energy saving
    The proprietary aeration system offers efficient air scouring for membranes.
  • Easy handling
    The PTFE hollow fibers are treated to be hydrophilic enabling ease of transportation and installation in a dry condition.
    DATA 1
  • Oil resistance
    The membrane is less prone to clogging, and can be cleaned with harsh alkalis, allowing treatment of oil-contaminated.
    DATA 1 DATA 2

Chemical resistance (Flow recovery) DATA1
The POREFLON Membrane Module is resistant to nearly all chemicals. The hollow fiber membrane can be washed with high-concentrated acids and alkalis. This means the membrane offers longer service life. In particular, the membrane has excellent resistance to high-concentrated alkali, making it usable for oil-contaminated wastewater treatment that has not gone through membrane filtration and wastewater from semiconductor and solar battery manufacturer that includes silicone.
Comparison of chemical resistance of membrane materials

Durability DATA1
The hollow fiber used in the POREFLON Membrane Module is highly durable against shaking and flexing, and it can operate without membrane breakage during air scouring.
Example of hollow fiber membrane durability test

Durability DATA2
The hollow fiber used in the POREFLON Membrane Module has a tensile strength that is six to ten times higher than hollow fiber membranes made of other materials, therefore, it would not be torn off during an extended period of operation.
Comparison of hollow fiber membrane strength

Water permeability DATA1
The membrane has a high porosity of between 75% and 85% to control resistance during transmission for high water permeability performance. In addition, the PTFE structure with two layers, a skin (filtration) membrane and supporting membrane, ensures excellent fouling resistance.
Comparison of water permeability performance (pure water)

Permeability DATA1
The POREFLON Membrane Module has high permeability with an A rank, and the high porosity enables high permeability, which in turn helps realize excellent permeability. This technology is used in sewage treatment and industrial wastewater treatment.
Comparison of permeability

Operational ease DATA1
Hydrophilic polymer is cross linked to PTFE fibers enabling long lasting hydrophilicity. It enables transport while dry. The module does not need to be hydrophilic treated at the site. The hydrophilicity remains even when stored dry after use, so the module can immediately pass through water when run again.
Comparison before and after hydrophilic treatment

Oil-contaminated wastewater treatment capacity DATA1
Three-dimensional fibril structure and high porosity of PTFE hollow fiber membrane prevent oil clogging. In addition, the membrane is highly resistant to alkali, which is essential in removing oil deposits. Although oil-contaminated wastewater had been difficult to treat with a membrane in the past, POREFLON is less prone to clogging and can be cleaned with alkali.
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.

Oil-contaminated wastewater treatment capacity DATA2
The table below shows that the membrane was able to reduce the oil concentration in the wastewater from 460mg/L to 3.8mg/L, less than 1/100th the original concentration. The POREFLON Membrane Module is highly regarded for its effectiveness in removing oil, and it is being used to treat produced water in the oil field, wastewater from oil refineries, petrochemical plants and cold rolling in steelworks.
Die-casting coolant wastewater | Comparison of treated water, concentrated water and raw water

Module Lineup

Submerged Type
Stable flux
The PTFE membrane combines highly durable hydrophilicity with asymmetric structure (double structure) to achieve excellent fouling resistance.
Compatible with a wide range of wastewater
Stable treatment can be achieved even for wastewater that contains oil and refractory organic matters. The PTFE membrane allows cleaning with strong alkali cleaning agents.
Low operating costs and space saving
The proprietary aeration system offers efficient air scouring for membranes with less aeration energy. In addition, the large membrane surface area per projection area greatly reduces the installation space.

Data Sheet (Submerge Type) Data Sheet (Cassette Type)

Pressurized Type
Large volume water treatment
This system is ideal for applications of a large volume of flow with relatively low turbidity.
*General industrial wastewater treatment, oil-contaminated wastewater, water purification (ground water, surface water, etc.)

Data Sheet