Remosa - Recubrimientos y Moldeados s.a.

Remosa - Recubrimientos y Moldeados s.a.

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- Model GREM - Greywater Treatment Plant

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The GREM treatment plant is an ensemble of systems for treating greywater (from showers, baths and hand basins) and rainwater to obtain reuse-quality water by means of membrane technology. The system complies with the requirements of Royal Decree 1620/2007 of 7 December, which establishes the legal status of treated water reuse, and of article 4 of the Spanish Technical Guide for Recycling Greywater in Construction drafted by Aqua España.

The facility’s signage should comply with point 2.2 of section HS4 of the Technical Building Code. These units are manufactured in compliance with standards BS-4994:1987.

Water treated for use in lavatory cisterns and for irrigation of landscaped areas should be channelled independently from mains potable water.

Equipment Tested in Pilot Plant. Patent No. U 200801364 BOP 01.09.2008

  • Compact system: roughing, oxidation, membrane filtration, chlorination and accumulation in a single equipment unit.
  • Considerable saving of drinking water.
  • Reuse of water for irrigation, lavatory cisterns and outdoor cleaning.
  • Helps to conserve the environment.
  • Attributes of the membrane bioreactor compared to conventional ultraviolet treatment:
    • High performance and purification reliability to obtain reuse-quality water.
    • The membrane bioreactor is impervious to sedimentation problems.
    • The membrane operates as a selective physical barrier that blocks the passage of suspended matter and microorganisms. In contrast, ultraviolet light loses absorption capacity when the water contains suspended solids.

The System Operates According to the Following Stages:

  • Roughing: Consists of removing any solids dragged along by water, mainly hair, which may damage the membranes.
  • Biological oxidation: Biological breakdown of organic matter takes place in the biological reactor thanks to incoming air and the generation of aerobic microorganisms.
  • Filtration: Solid-liquid separation occurs by filtration through membrane technology. A suction system exerts vacuum pressure on the membranes, creating an inside-outside flow in such a way that the water penetrates through the membranes, with the solids and bacteria left outside on the external wall. The diffusers create an ascending air flow that cleans the external wall surface of the membranes and ensures aerobic conditions.
  • Chlorination and accumulation: The treated water is chlorinated by dosing with sodium hypochlorite, allowing the sanitary properties of the effluent to be conserved and ensuring the reuse of the water. It is then stored in an accumulation compartment.

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