In a sustainable development context, the storm water reuse in industry seems a promising and original alternative, but few experiences exist. A project, sponsored by the European Community and the Artois-Picardie Water Agency, has been carried out by the Renault MCA factory in Maubeuge, demonstrating that it can be profitable, in certain conditions, to reuse storm water in industrial processes. This article summarises this experience, and presents a decision making tool (SIRRUS) that has been developed in this framework by Anjou Recherche (Vivendi Water) to evaluate, on the basis of simple criteria, if this experience is or is not reproducible on a given site, and how much time is necessary to pay the investment back. Its application and different results are also discussed.

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