Deep Bed Filtration

The deep bed filtration allows physical retention reducing turbidity and suspended materials in water. Coarse particles are retained in the cavities of the bed.

There are two main kinds of filters:

  • Long service life granular filters. They alternate phases of filtration and backwash triggered by the pressure difference between the inlet and the filter outlet, or according to the volume passed through the filter. They can be operated either manually or automatically.

  • Fiber filters are presented as disposable filter cartridges with the retained particles. They allow a very simple manual operation and maintenance.

 Surface Filtration

Wherein the removal occurs at the filter surface and the particle size can be predicted. Filtration is perpendicular to a mesh of a minimum cutting diameter of 1 μm .Steel mesh and polypropylene are common on the market. The treated flows can commonly range from 1m3 / h to 1000 m3 / h. The filters with more hydraulic capacity use steel mesh cleaned mechanically, manually or automatically.


  • Lower energy consumption
  • Lower consumption of chemical products.
  • Easy to operate
  • Long service life


Adsorption is a physical-chemical technology that allows to retain or “adsorb” a particular element according to the affinity of the selected filter media.

Depending on the medium, the adsorption phenomenon may be reversible or irreversible. Our company has developed a variety of solutions and equipment for the treatment of different pollutants and heavy metals (arsenic, fluorine, boron, etc.).

 Adsorption by Disposable Means

This solution has the advantage of not generating effluents and hazardous waste. The heavy metal is trapped or encapsulated on the used medium, which may be dumped as household waste in an approved sanitary landfill.
Our company has extensive experience in removing arsenic. The most commonly used system is the adsorption of arsenic in a fixed bed as a filter medium.

Main System features:

  • Arsenic reduction up to 95%
  • Compact system
  • Apt for high arsenic loads
  • No chemical products required


  • Lower energy consumption
  • Low chemical products consumption
  • Allows reaching very low levels of the element to treat
  • Doesn’t need special effluent treatment
  • Easy management of the saturated medium

 Ion Exchange

The reversible ion exchange resin technology is a separation process based on the transfer of fluid-solid material. It involves the transfer of one or more ions from the fluid face to the solid face through the displacement or exchange of ions of the same charge that are united by electrostatic forces with functional group surfaces. The process efficiency depends on the solid-fluid equilibrium and mass transfer rate. The solids are generally of polymeric type, the most common being synthetic based resins.

This technology is unique in allowing feedbacks which extend the useful life of the resin. The management of effluents from regeneration has to be taken into account in the process.

WES recommends this solution for treating nitrates, sulfates, boron and others. For the latter, boric acid is produced, which can be reused for industrial needs.


  • Low energy consumption
  • Very low concentrations of the treated element
  • Long service life of the resin

Treatment with Membranes

Filtration with membranes uses four types of technologies, categorized by cut or pitch diameter, which allows selection of the matter or element to retain.

Membranes must work with high pressure differences; and the best type of technology to select depends on the process requirement and the quality of the water to obtain.

Filtration is done in a tangential way so that the modules will not clog, generating two streams: the permeated, with a lower concentration of elements, and the concentrated, with a higher proportion of them.

 Reverse Osmosis

Reverse osmosis is the most common technology used for desalination of brackish water and seawater. This technology consumes much electric energy due to the high pressures required.

WES offers compact desalination and purification solutions by reverse osmosis to solve the necessity of water supply anywhere in the world.


  • Efficient solution for a large amount of pollutants
  • Achieves very low concentrations of the treated element
  • Long membrane service life
  • Easy management of the used membranes


Disinfection allows the deactivation or destruction of pathogenic organisms down to levels lower than required by the current legislation. Disinfection can be achieved by physical or chemical disinfectants. WES offers 3 technologies to disinfect drinking water:


Chlorination can be performed by injection of chlorine gas, sodium hypochlorite or calcium hypochlorite (chlorine tablets). This alternative is an economical and easy to implement solution, whose persisting effect limits the reappearance of pathogenic organisms. This technology generates remains that should be controlled according to the current environmental legislation (0.2 to 2.0 mg / L).


  • Eliminates the majority of viruses and bacteria
  • Eliminates taste and smell
  • Eliminates or reduces organic coloration
  • Disinfectant protection against recontamination
  • Low cost implementation

 UV Disinfection

The ultraviolet disinfectant system sends electromagnetic energy that reaches and destroys bacterial and viral genetic material. This compact technology uses no chemicals and generates no remaining wastes; it also has no effects that could affect humans.


  • It does not require storage or chemicals transportation
  • Effective against most viruses, spores and cysts
  • No generated chemical by products


Ozone is used for its high organic matter oxidation capacity in water sterilization. The system fractions oxygen molecules in the environment, and the oxygen atoms instantly react with other oxygen molecules creating ozone. Ozone must be produced in situ, and directly injected into the water to disinfect.


  • Strong disinfectant and oxidant
  • Very effective against viruses
  • Enhances turbidity removal under certain conditions
  • Taste and smell control
  • Does not generate chemical by products
  • Safe manipulation