forward osmosis hollow fiber module


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Hollow fibre modules made from hollow fibre forward osmosis membranes

Hollow fibre module summary

Packing density up to 1600 m2/m3
Advantage ideally suitable for high volume applications due to high packing density and resulting small module footprint
Disadvantage prone to fouling / membrane clogging at low concentrations of fouling agents

Detailed description

forward osmosis hollow fiber module
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Hollow fibre modules are basically tubular modules with very high packing densities (see the table below), and are used extensively for large-volume water treatment applications, such as desalination of seawater via reverse osmosis processes, where a small module footprint is essential for the economical viability of the given membrane installation. Hollow fibre membranes are prone to fouling and clogging due to their small internal diameters. This is also the case for forward osmosis hollow fibre membranes and therefore usage for industrial water treatment is limited to applications where waste water streams contain low concentrations of fouling agents. Such applications include:

  1. Desalination
  2. Downstream waste water processing steps


Parameter Value
Hollow fibre length 1m
Hollow fibre wall thickness 0,2mm
Hollow fibre inner diameter 1mm
Hollow fibre inner area 0,0031m2
Inner diameter of module 90mm
Number of hollow fibres in module 3227***
Internal volume of module 0,0064m3
Active area per module 10m2
Packing density 1600

*** See for an online calculation tool of how many small circles fit into a large circle

Please follow the links below for more information on forward osmosis module design possibilities:

  1. Plate and frame forward osmosis membrane modules
  2. Spiral wound forward osmosis membrane modules
  3. Tubular forward osmosis membrane modules



  1. Excuse me, I would like to know this price of Hollow fibre modules for FO process. I need it for my project calculation in order to find economic analysis. Thank you.

    • Dear Superacer,

      I am representing Aquaporin, where we have developed Hollow Fibers for FO. For more information please visit our homepage at or you can contact me directly at I will be happy to help you with HFFO for your project.

      All the best
      Christian Døring


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