Demineralization of industrial water


Demineralization of industial water

ImWater designs, manufactures and implements industrial demineralization systems based on reverse osmosis, ion exchange and electrodeionization technologies to reduce the dissolved salt content of water.

Certain pollutants such as heavy metals or dissolved salts cannot be removed from the water with other conventional processes, and it is necessary to use technologies such as reverse osmosis, ion exchange, electrodeionization, mixed beds, etc.

ImWater designs customized systems for a specific inlet water quality and based on a specific treated water quality that you want to achieve.

The most common applications for this type of industrial water demineralization systems are:

  • Demineralization of feed water to boilers, which require very low conductivity and presence of metals. Named DEMI water.
  • Water treatment for industrial parts or components washing processes that require water that does not leave residues of any kind.
  • Water treatment for laboratories or the production of chemicals or medicines that require the highest purity water quality.

The industrial demineralization systems supplied by ImWater are designed in a compact way, mounted on racks or containers, and with adequate dimensions for easy transport and installation.

Osmosis, electrodeionization, ion exchange and mixed bed systems can be designed, with capacities from 1 m3 / h to 100 m3 / h or more, depending on the client’s needs.



Industries that have steam boilers, combined cycles, etc., require a very high quality supply water, free of dissolved salts, which damage equipment over time. To avoid this, systems that produce very low conductivity water must be installed, which are based on combinations of reverse osmosis with more than one pass, electrodeionization or mixed ion exchange beds.

    • Softening: Special cation exchange resins for removing hardness (calcium and magnesium). Regenerated with salt (NaCl)
    • Ion cation / anion exchange and mixed beds: It consists of a refining process for the final permeate of a reverse osmosis. By means of ion exchange resins, both anionic and cationic, different ions still present in the permeate water are sequestered, thus obtaining a demineralized water. Ion exchange requires periodic regeneration of the fillings and uses a large amount of chemicals. The equipment itself is similar to bed filters.
    • Two passes reverse osmosis : In a two pass reverse osmosis configuration, the permeate from the first pass is fed back into another set of membranes to further reduce its conductivity.
    • Electrodeionization (EDI): Among other applications, it is a refining process of the final permeate of a reverse osmosis, in which ultrapure water is obtained. It is based on the elimination of ions by electrical interactions that attract them towards the corresponding poles, eliminating them from the water current. The great advantage is that it operates without the use of chemicals. The equipment itself is similar to reverse osmosis membranes, elongated cylindrical vessels.

Softener Duplex




The rights of this image belong to “C. Rohloff, Kiefernweg 4, D-28227 Celle (Own Work /Eigen) [GFDL ( or CC BY 3.0 (], via Wikimedia Commons”





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