TECHNOLOGIES

OUR TECHNOLOGIES

For the production of filters, we use different technologies:

  • Mechanical filtration for the removal of particulate matter and all organic and inorganic suspended particles;
  • Chemical-physical treatment for the removal of all organic and inorganic compounds dissolved in water;
  • Combined filtration: by pairing the two different technologies, new treatment systems are implemented to improve the refining capacity

PRE-FILTRATION

The first stage of filtration. WCF adopts a mechanical filtration system with a grade of 5μm, representing the suitable pre-filtration for all filtering systems. It retains all coarse particles such as suspended solids, insoluble compounds, sand, silt, and others.

This also allows the downstream filters to be more effective and have a longer duration, for better leading treatment quality.

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MICROFILTRATION

The microfiltration is the filtration process that removes all particles typically contained in a liquid with a diameter larger than 0.5 microns. 0.5 micron.

Microfiltration is carried out by filters with pore diameters of 0.5 microns, which prevent the passage of all solid particles and any type of suspended residue in water (sand, debris, rust, algae, and various sediments)   while not removing the essential minerals for our body: magnesium, calcium, sodium and potassium.

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ULTRAFILTRATION

Ultrafiltration is a highly effective filtration process placed between reverse osmosis and microfiltration. This water purification method has a greater filtering capacity than microfiltration because it removes particles with a size of up to 0.01 microns. However, unlike reverse osmosis, it does not eliminate dissolved mineral salts into water.

The ultrafiltration system is based on the principle of the physical separation of substances that can be found into water.. Without an internal pump, it uses the pressure of the household water, to push the water through a semi-permeable membrane and remove the contaminants. The pores of this semi-permeable membrane are so small that they prevent the passage of substances such as viruses, bacteria, cysts, solid particles, and turbidity. On the contrary, dissolved minerals and essential elements beneficial for the human body can pass through.

This physical process eliminates the risks of water contamination, ensuring safe and bacteriologically pure water.

Keeping in mind that ultrafiltration is also used for the cleaning and sterilization of medical devices.

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NANOFILTRATION

Water nanofiltration is one of the most recent methods of filtration. In terms of filtering capacity, it is placed between ultrafiltration and reverse osmosis. This technique is primarily used for the removal of pollutants, water softening, and decolorization..

Through pressure, the membranes create a separation like a sieve. The pores of the membrane do not allow the passage of particles with a diameter bigger than 0.001 micron.

Nanofiltration is mainly used for:

  • Removal of micro-pollutants
  • Softening
  • Decolorization
  • Water disinfection

Nanofiltration can be seen as a coarse reverse osmosis, as it uses less fine membranes.

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ADSORPTION

Adsorption is a process where a solid is used to remove a soluble substance from water.

The most used adsorbent material in drinking water treatments is activated carbon. It is specifically produced to have a very large internal surface area (500 – 1500 m2/g) and a high affinity for organic compounds.

For this reason, activated carbon is used to remove specific organic molecules that cause odors and spores. These natural organic substances are part of the causes of color in water and can react with chlorine to form disinfection by-products; synthetic organic compounds such as pesticides, herbicides, trichloroethane, tetrachloroethylene, and benzene.

Activated carbon is used by WCF in various forms: Powdered Activated Carbon (PAC), Granular Activated Carbon (GAC), and extruded activated carbon CARBON BLOCK.

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IONIC EXCHANGE

Ionic exchange is a chemical-physical process for removing dissolved compounds in water by replacing ions from a liquid phase to a solid phase and vice versa. The most commonly used exchanging materials in WCF are synthetic organic materials: strong cationic resins and weak cationic resins are employed for softening and decarbonization, while mixed bed resins are used for water demineralization.

In addition to these selective ion exchange resins specific for the removal of nitrates, arsenic and heavy metals.

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PRE-COAT

PRE-COAT is WCF's cutting-edge technology that combines the advantages of microfiltration with the adsorptive properties of powdered activated carbon (PAC).

By combining the microfiltration membrane with powder activated carbon, unpleasant odors and tastes such as those of chlorine and its byproducts (atrazine, solvents, pesticides, chlorinated compounds) are removed from the microfiltered water, resulting in a much more pleasant and enjoyable taste.

When water passes through the filter, the powdered activated carbon is distributed along the walls of the membrane, creating a composite filtration system called pre-coat. The powdered carbon settles evenly on the outer surface of the filter membrane; in this way, all the flavors and odors present into the water are absorbed while the filter membrane retains all particles with a diameter equal to or higher than 0.5 microns (0.0005 mm).

This type of system ensures constant and uniform filtration. A non-return valve inside the filter ensures that impurities accumulated in the filter are not released back into the water supply.

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