Sustainable management of wastewater systems: presentation of an adaptative model based on local dialogue and quality of service assessment

Water resources management is a worldwide challenge for the 21 century. Water resources management in urbanized cities raises the question of cohabitation between the collective wastewater services and the individualized systems. Thus, an objective measure of efficiency is required: this can be done by evaluating the level of provided service instead of evaluating the means available themselves. For several decades, the emergence of new alternative technologies has been raising the question of services efficiency offered by traditional technologies used in drainage management. This question is emphasized by the need for a global management of wastewater systems and the evolution of legislation, from discharges standards ("emission based") to standards in environment acceptance capacities ("immision based"). Integrating these impacts becomes a necessary step in order to plan sustainable drainage decisions. In this context, a methodology, named EDASR , is proposed to support wastewater management strategies. This methodology is applied on the SIVOM (Intermunicipal Union with multiple vocations) of the Mulhousian agglomeration (Alsace, France). This study is conducted with a close collaboration of local authorities, of the “Lyonnaise Des Eaux” (Mulhousian manager) and of local stakeholders (associations, Water Agency, etc.).