Membrane Geometries and Module Configuration

Today we are going to discuss about membrane geometries and module configuration.

Membrane Geometries

Spiral wound modules: This consists of large consecutive layers of membrane and support material rolled up around a tube.


Maximizes surface area

Less expensive.


(i) More sensitive to pollution.

Tubular membrane

Membrane Geometries and Module Configuration

The feed solution flows through the membrane core and the permeate is collected in the tubular housing.


(i) Generally used for viscous or bad quality fluids.


(i) System is not very compact and has a high cost per unit area installed.

Hollow fiber membrane

The modules contain several small (0.6 to 2 mm diameter) tubes or fibers. The feed solution flows through the open cores of the fibers and the permeate is collected in the cartridge area surrounding the fibers. The filtration can be carried out either ―inside-out‖ or ―outside-in.

Read Also : Sedimentation Processes in Waste-water Treatment

Module Configuration

Pressurized system or pressure-vessel configuration:TMP (trans-membrane pressure) is generated in the feed by a pump, while the permeate stays at atmospheric pressure.

Pressure-vessels are generally standardized, allowing the design of membrane systems to proceed independently of the characteristics of specific membrane elements.

Immersed system: Membranes are suspended in basins containing the feed and open to the atmosphere. Pressure on the influent side is limited to the pressure provided by the feed column. TMP is generated by a pump that develops suction on the permeate side. Ultrafiltration, like other filtration methods can be run as a continuous or batch process

Applications of Ultrafiltration

In conclusion, from the above we can conclude that Ultrafiltration is a pressure-driven purification process in which water and low molecular weight substances permeate a membrane while particles, colloids, and macromolecules are retained.

Read Also : Rotating Biological Discs Process

The primary removal mechanism is size exclusion, although the electrical charge and surface chemistry of the particles or membrane may affect the purification efficiency. It has got a wide variety of uses, one of which is in industrial waste-water treatment.

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Benadine Nonye

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