CityLoops (Closing the loop for urban material flows) was a Horizon 2020 project which focused on circular economy solutions for bio-waste and construction and demolition waste (CDW).

Seven European cities (Apeldoorn (NL), Bodø (NO), Høje-Taastrup & Roskilde (DK), Mikkeli (FI), Porto (PT) and Seville (ES) piloted a series of circular economy actions tackling construction and demolition waste, including soil, and bio-waste with the aim of achieving material circularity. The cities implemented ten demonstration actions and tested over 30 new tools and processes.

The project website has sections on CDW, bio-waste and circularity in cities. There is a huge amount of information available: the tools are given along with replication packages and a summary of lessons learned. The project was very keen to ensure that their tools can be rolled out elsewhere as easily as possible.

The CDW section covers:

• Planning and decision-making
• Stakeholder engagement
• Circular demolition
• Data and material passports
• Material banks and marketplaces
• Recycling concrete
• Circular soil handling
• Circular procurement
• Business cases

The bio-waste section covers:

• Bio-waste prevention
• Bio-waste collection
• Bio-waste valorisation
• Enablers

The circularity in cities section covers:

• What can cities do?
• Measuring city circularity
• Circular procurement
• Replication & exploitation of results
• Stakeholder engagement
• Business cases