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RO - Reverse Osmosis

Reverse osmosis (RO) is a membrane filtration technology that removes particles larger than 0.0001 microns in size from a liquid. This includes ions, such as sodium and chloride, as well as organic molecules, such as pesticides and herbicides. RO is used in a variety of applications, including water and wastewater treatment, food and beverage processing, and pharmaceutical manufacturing.

RO membranes are typically made of thin-film composite (TFC) materials. TFC membranes consist of a thin layer of polyamide on top of a support layer made of polysulfone or polyethersulfone. RO membranes are configured into modules that typically operate in crossflow where the feed liquid is pumped across the surface of the membrane. This creates a shear force that helps to prevent fouling of the membrane.

RO is a very effective technology for removing impurities from water.

Here are some of the key advantages of RO:

  • Effective removal of dissolved solids 
  • Versatile - can be used in a variety of applications
  • Produces high-quality water
  • Cost-effective technology when compared to thermal processes

MANN+HUMMEL Water & Membrane Solutions has a wide portfolio of RO membranes that can cover different applications, sizes and configurations. We can also produce customized product in accordance with specific requirements.


RO is used in a wide variety of industries and applications, including:

  • Seawater and brackish water desalination
  • Production of ultrapure water, for semiconductors and pharmaceutical applications
  • Removal of harmful compounds 
  • Concentration of organics for the food, beverage and life science industries

Our RO products











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