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Project cooperationUpdated on 1 September 2026

MET4Grey - Give water a second life

Head R&D Department at METfilter S.L.

Spain

About

MET4grey® collects greywater from showers and sinks and directs it to a storage tank. The water then passes through two modular greywater treatment systems based on METland® technology, where electroactive microorganisms remove organic matter and other pollutants. Finally, the water is disinfected, stored, and ready for reuse in non-potable applications on-site such as irrigation or toilet refilling.

Topic

  • NEB-2026-01-REGEN-03: Innovative solutions for the sustainable and beautiful use of vertical space
  • MISS-2026-04-CIT-NEB-B4P-CCRI-03 – Introducing circular economy models in the construction sector, from buildings to city scale

Organisation

METfilter S.L.

Company (outside the construction ecosystem)

Madrid, Spain

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