Portugal

Douro waters wins international innovation award with ceramic mud design

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Briefings

Águas do Douro e Paiva secured an International Water Association Gold Award in 2026 for a project converting treated water sludge into ceramic tiles. The initiative, led by Bruno Coimbra, utilized a partnership with FEUP and CTCV to valorize 2.280 tons of sludge annually, producing 14 million tiles. The project won the 'Performance Improvement and Operational Solutions' category at the 2026 IWA World Water Congress in Glasgow, where 320 candidates from 65 countries were selected. The entity also received the Climate Smart Utility 2026 certificate, highlighting its environmental performance across 22 municipalities serving 1.8 million people.

Key points

• Águas do Douro and Paiva received an International Water Association Gold Award in 2026 for converting treated water sludge into ceramic tiles.
• The project utilized 2.280 tons of sludge annually to produce 14 million tiles through a partnership with FEUP and CTCV.

Context and limitations

The award was presented at the 2026 IWA World Water Congress in Glasgow, where 320 candidates from 65 countries were selected. The project operates across 22 municipalities serving 1.8 million people in the Grande Porto region.

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