The aim of the project is to assemble the operational ecosystem and develop operating models, to bring solutions to 6Aika cities for the exploitation of large volume industrial side streams and land masses resulting from infrastructural construction. Efficient recycling and re-use of land masses in cities can generate significant economic savings on the one hand and reduce CO2 emissions in cities on the other. More than 90 % of waste is generated by extractive activities and the manufacturing (forest, metal and energy) industries, meaning that these high volumes of mass increasingly require special attention. By contrast, municipal waste amounts to less than 3 % of the total amount of waste and several projects are under way in the public sector to increase its recycling rate. The manufacturing side streams have not been sufficiently exploited in business activities, although recovery and processing technologies are already well developed. Expanding the potential for waste recovery in civil engineering is part of Prime Minister Juha Sipilä’s key project to promote circular economy and recycling. In a joint project, the Ministry of the Environment and the Finnish Environment Institute have prepared the Government Decree on the recovery of waste in land construction (the so-called MARA Decree) and the Regulation on the recovery of waste from construction (the MASA Decree). The MARA and MASA regulations promote regeneration and change urban activities. As a result, cities are now facing a new challenging task, better use of high-volymic land masses, rather than traditional ploughing. This is why the CircVol project aims to find solutions to new urban challenges and to support cities in achieving these new exploitation objectives. This will be done by gathering the right talents and actors in a national network of operators, which will be able to provide circular products and services, in particular for the exploitation of large volume industrial by-streams and land masses resulting from infrastructure construction. Sustainable solutions and new operating models support the development of cities into carbon neutral, while at the same time supporting companies in commercialising new services and products as export products to international markets. The EU’s horizontal principles are sustainable development, equality and equality. The objective of sustainable development is to ensure that future generations have equal or better opportunities for action than current generations have. Sustainable economic growth is the most important safeguard for well-being and future operating conditions. The CircVol project promotes sustainable re-use of high-volyage flows and sustainable built living environment, which will also be sustainable for future generations. The project will encourage re-use and the recovery of recycled materials in land and urban construction, thus saving valuable and depleted natural resources. The project is aware of the promotion of equality and equality and the target groups of the project — urban organisations and companies and project partners are treated equally and equally. The main sectors of the project — the chemical and construction industries are quite gender-specific, but when the project brings the sectors around a common cause, equality and equality between them will also be promoted. The measures envisaged and the business opportunities offered by the project take into account a wide range of companies and actors and enable equal participation of all. The project implements 6Time strategy, which is to strengthen national competitiveness, create new skills, business and employment, and use cities as development environments. In the project, companies produce sustainable solutions that are competitive in national and international comparisons. The solutions are based on new insights, the aim is to grow and renew companies’ business operations and thereby create jobs. New solutions will first be tested in one of the reference cities and knowledge of successful experiments will spread to other 6Aika cities through partners and the national operator ecosystem. This will enable regions to learn from each other together and the accumulation of knowledge while avoiding the development of similar issues in different cities. This approach supports the construction of good cooperation 6A time between cities in dealing with masses of large volumes. Cities will be supported in saving energy and virgin land masses, achieving carbon-neutral targets and moving towards sustainable development. Three main results will be achieved during the project: 1) national operator ecosystem 2) operating models and business concepts to support Finnish cleantech business growth and industrial renewal and international vi