Our success stories.
Madrid fills its first urban pond entirely with treated rainwater
Client: Espacio Caleido
Partners: City of Madrid, University Polytechnic of Madrid, Delft University of Technology
Year: 2020–2021
Problems solved: Potable water overconsumption for an ornamental pond, sustainable urban drainage
Rainwater reused for: Filling and maintaining the architectural urban pond (replacing drinking water)
Impact: 460 m³/year reused; 14,490 m² catchment; 500 m² pond supplied
TU Delft tests climate-resilient water solutions under real urban conditions
Client: The Green Village (TU Delft campus testing ground)
Partners: VP Delta, TU Delft, Van Gelder
Year: 2020–ongoing
Problems solved: Drought & heat stress, bio-filtration R&D, testing technology in real-world (not lab) conditions
Rainwater reused for: Irrigation, cooling, toilet flushing, educational demonstration
Impact: 500 m³/year stored and reused; 1,600 m² catchment; four bio-filter configurations tested in parallel
Aquafin proves rainwater can be safely treated at neighborhood scale in Flanders, Belgium
Client: Aquafin
Partners: Aquafin, Delft University of Technology
Year: 2019–2020
Problems solved: PFAS & emerging pollutant removal, decentralized stormwater treatment, feasibility in Belgium
Rainwater reused for: Research & development in innovative water solutions/ proof-of-concept testing
Impact (Pilot scale): ~280 m² catchment; 10 m³ buffer; 9 m² bio-filter
Rotterdam builds a waterbuffer that irrigates Sparta Stadium’s football pitch
Client: City of Rotterdam
Partners: KWR Water, CODEMA Group, Van Gelder
Year: 2018
Problems solved: Flooding during heavy rainfall in Spangen district, drinking water overuse for sports field irrigation, water quality (iron, PAHs, nutrients)
Rainwater reused for: Irrigation of the Sparta football pitch
Impact: 15,000 m³/year reused; 25,000 m³ stored; 1,400 m³ buffer; 40,000 m² catchment