Water Filtration
Water Treatment
Agro Projects

Watertech GW



The Watertech GW DU gray water recycling plant treats water from showers, bathtubs and sinks for reuse in toilets and irrigation of green areas.

Gray water comes from showers, bathtubs and sinks. Unlike wastewater (also called black, served or fecal), it has a low concentration of organic matter and suspended solids, although it may contain high concentrations of phosphates and chlorinated chemicals from detergents and soaps.

In buildings or household communities where the installation is carried out, there must be a gray water collection pipe that is independent of the sewage drain pipe and a supply of treated water for toilets or irrigation (identified with a different color) independent of mains water.






  • Ultrafiltration membrane treatment removes suspended solids, bacteria and viruses larger than 0.03 microns to guarantee the quality of potable water, regardless of variations in raw water quality.
  • Guaranteed membrane protection due to patented Azud Helix Automatic prefiltration disc system.
  • High water-treatment capacity in minimum footprint. Modular; will fit through any standard door.
  • Closed metal cabinet protects electromechanical and control equipment. No need for chemicals reagents and unnecessary consumables that generate extra costs.
  • Fully autonomous operation ensures the water quality and maximum equipment protection. No need for permanent staff.
  • Compact, modular plant, with simple and immediate installation and operation. No civil engineering or setbacks.
Design Criteria


Design criteria features can vary. Possible features include ‑

  • SS submersible grinder supply pump
  • Oxidant dosing
  • Coagulant and flocculant dosing
  • Helix Automatic prefiltration disc system
  • Ultrafiltration membrane filtration
  • Backwash and CEB skid
  • Chlorine residual dosing
  • Measurement and control equipment
  • Electrical panel, automation and control system
  • Framework, piping and electrical connections
  • Testing


The disc is a flat ring with grooves on both sides and manufactured from plastic material. It is resistant to all the chemical products normally used in agriculture and industry. Disc models in the market differ according to the material used in their manufacture, geometry and dimensions, and by the characteristics of the grooved channel. The researched design of Azud discs and grooved channel generates real in-depth filtration.

Once the discs are stacked, the direction of the channels in the upper side of each disc always faces the opposite direction of the channels in the lower side of the adjoining disc. Such orientation generates numerous intersection points along the trajectory of the water in the interior of the stack of discs, and in this way determining the retention level of particles.

The higher or lower the filtration quality, defined as the higher or lower quantity and size of particles the filtering element is able to retain, depends on the geometry and size of the channels, their length and the number of generated intersection points.

Technical Specifications