If you are a power plant operator dealing with massive cooling tower water losses — this project developed a fully operational TRL7 unit with 100 m³/day capacity that achieves over 99% water recovery at just 0.30€/m³. The near-zero liquid discharge approach means virtually no wastewater leaves your site. Smart sensors and automated controls optimize the process in real time without constant operator intervention.
Smart Water Recycling Systems That Recover Metals and Energy from Industrial Wastewater
Imagine your factory uses tons of water every day, and when it comes out dirty, you just throw it away — along with valuable metals dissolved in it. This project built smart treatment units that clean that water so you can reuse over 99% of it, while fishing out metals like copper and chromium that you'd otherwise lose. It's like a recycling plant for your wastewater that pays for itself by recovering materials and slashing your water bill. Three working pilot units were installed at real industrial sites — a power plant in Greece, a mining-related facility in Spain, and a metal plating factory in Germany.
What needed solving
Energy-intensive industries — power plants, mining, metal plating — consume enormous volumes of water and discharge contaminated wastewater containing valuable dissolved metals. They pay twice: once for fresh water intake and again for wastewater treatment and disposal, while losing recoverable materials worth thousands of euros. Tightening EU discharge regulations and rising water costs are making the status quo unsustainable.
What was built
Three fully operational industrial pilot units: a TRL7 cooling tower water treatment system (100 m³/day, >99% recovery at 0.30€/m³) at a Greek power plant, a TRL8 metal recovery unit (25 m³/day, recovering 95% of chromium/copper) at a German electroplating factory, and an integrated energy-producing water treatment pilot (100 m³/day) in Spain. Plus custom sensors, machine learning control software, and high-performance membranes.
Who needs this
Who can put this to work
If you are a metal plating facility spending money on fresh water and losing valuable metals in your rinse water — this project built a TRL8 unit with 25 m³/day capacity that recovers up to 95% of chromium and copper, 50% of nickel, and preserves 65% of fresh water. The hybrid high-recovery reverse osmosis and ion exchange system was installed and tested at a real electroplating plant in Solingen, Germany.
If you are a mining operation struggling with brine disposal and water scarcity — this project demonstrated an integrated pilot unit combining reverse electrodialysis with solar-powered membrane distillation at 100 m³/day capacity. The system simultaneously treats industrial water and produces energy, turning your waste stream from a cost center into a potential revenue source. The pilot was installed and tested in Castellgali, Spain.
Quick answers
What does it cost to treat water with this technology?
The cooling tower blowdown treatment unit demonstrated a cost of 0.30€/m³ with over 99% water recovery. For metal plating wastewater, the system recovers valuable metals (chromium, copper, nickel) that offset treatment costs. Exact ROI depends on your water intake costs, discharge fees, and metal prices.
Can this scale to my factory's water volumes?
The project built units at 25 m³/day (metal plating) and 100 m³/day (power plant and mining applications). These are industrial pilot scales designed as building blocks — multiple units can be combined for higher throughput. The TRL8 metal plating unit was designed for full commercial deployment.
Who owns the intellectual property and can I license this?
The consortium of 21 partners across 8 countries includes 12 industrial partners and 5 SMEs. IP is likely shared among consortium members. Contact the coordinator (NCSR Demokritos, Greece) or the specific industrial partners for licensing discussions on individual components like membranes, sensors, or control software.
Is this technology proven or still experimental?
Three case studies were demonstrated at real industrial sites: a TRL7 unit at a PPC power plant in Megalopolis, Greece; a TRL8 unit at BIA GmbH electroplating facility in Solingen, Germany; and an integrated RED/MD pilot in Castellgali, Spain. These are fully operational systems, not lab experiments.
How does the smart monitoring system work?
The project developed customized sensors for parameters like Fe²⁺, SO₄²⁺, and Cl⁻, integrated with conventional sensors for pressure, temperature, conductivity, and turbidity. Machine learning software on a cloud-based platform enables real-time process adaptation and automated decision-making, reducing the need for constant human oversight.
What kind of membranes were developed?
The project delivered nanofiltration membranes achieving 50 LMH water flux with over 98% salt rejection at 5 bar, plus PVDF-based membranes for membrane distillation (100 m² produced, minimum 20 LMH water flux, over 99.5% salt rejection). Optimized tubular ultrafiltration modules were also delivered for the case studies.
Does this comply with zero liquid discharge regulations?
Yes, the project specifically targeted zero liquid discharge across all three case studies. The cooling tower treatment unit achieved over 99% recovery, and the metal plating unit recovers metals while preserving 65% of fresh water. This positions the technology well for increasingly strict industrial discharge regulations in the EU.
Who built it
The intelWATT consortium is unusually well-balanced for commercialization, with 12 out of 21 partners (57%) coming from industry — well above the typical EU project average. Five SMEs bring agility, while the coordinator NCSR Demokritos provides deep research capability in membrane technology. The 8-country spread across Germany, Greece, Spain, France, Italy, Jordan, Netherlands, and UK gives the consortium direct market access across Southern and Central Europe plus the Middle East. The presence of end-users like PPC (Greek power utility) and BIA GmbH (German electroplater) as pilot hosts means the technology has already been validated by the companies that would actually buy it. This industry-heavy makeup suggests the consortium is positioned for commercial follow-through, not just publications.
- NATIONAL CENTER FOR SCIENTIFIC RESEARCH "DEMOKRITOS"Coordinator · EL
- AVVALE S.P.A.thirdparty · IT
- NIJHUIS WATER TECHNOLOGY BVparticipant · NL
- STICHTING IHE DELFT INSTITUTE FOR WATER EDUCATIONparticipant · NL
- DIMOSIA EPICHEIRISI ILEKTRISMOU ANONYMI ETAIREIAparticipant · EL
- THE UNIVERSITY OF BIRMINGHAMparticipant · UK
- AVVALE ESPANA SLparticipant · ES
- CENTRO DE INVESTIGACIONES ENERGETICAS MEDIOAMBIENTALES Y TECNOLOGICASparticipant · ES
- NOKIA SOLUTIONS AND NETWORKS HELLAS SINGLE MEMBER SAparticipant · EL
- CONSIGLIO NAZIONALE DELLE RICERCHEparticipant · IT
- UNIVERSITY OF JORDANparticipant · JO
- ACSA OBRAS E INFRAESTRUCTURAS SAUparticipant · ES
- POLITECNICO DI TORINOparticipant · IT
- REDSTACK BVparticipant · NL
- TECHNISCHE HOCHSCHULE KOLNparticipant · DE
- CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRSparticipant · FR
- TINEXTA INNOVATION HUB S.P.A.participant · IT
NCSR Demokritos (Greece) coordinates; industrial partners REDstack (NL), BIA GmbH (DE), and Fuelics are key for technology access
Talk to the team behind this work.
Want to explore how intelWATT's water recovery and metal reclamation technology fits your industrial process? SciTransfer can connect you with the right consortium partner for your specific application.