The restoration of areas contaminated by industrial or mining activities has been a major issue in environmental research in many European countries since the 1980s, and it also constitutes a major area of research at the Helmholtz Centre for Environmental Research — UFZ. Within this research environment, a consortium consisting of natural and social scientists has developed an EU-funded research project aimed at providing problem- oriented, tailored approaches and technologies for the revitalization of contaminated areas. The approach taken by the project is one that seeks to integrate scientific and non-scientific knowledge. In this paper we show how the idea of joint knowledge production between scientists and non-scientists is pursued in the context of the project. We explore how the rather fuzzy presentation of the transdisciplinary approach in the project proposal opens the door to interpretation and appropriation by scientists and practitioners alike. We describe a number of ad hoc solutions that were deployed to overcome specific dissonances during the collaborative production of knowledge (e.g. substituting common group learning for the single-handed elaboration of concepts by one project partner, or substituting the consultation of external experts for the mere gathering of information). Finally, we show how the interdisciplinary research environment at UFZ enhances the ability of the project team to resolve dissonances, improves collaboration between partners, and increases the innovative potential of project outputs.