PISYS - Real-time management and operation of an urban sewage system in relation to the quality of the natural environment

The objective of the project was to demonstrate the environmental benefits related to the real time management of the flows in the treatment networks of an urban area based on a management strategy that included real time monitoring of the condition of the receiving medium and the quality of the effluent. This was to be demonstrated in the greater Metz area. This objective was reached by the installation of 6 measurement stations and 9 alert stations along the river Seille and its treatment network (measuring flows and physical-chemical parameters). When values go outside predefined tolerances, a sample of the effluent is automatically taken and an alert is raised. In addition, modelling software (MOUSE) was developed to represent the transit flows in dry and rainy weather and the impact of the concentrations on the natural environment. A database was constructed to record the various parameters and ensure that corresponding values are transfered to the MOUSE model. The concept was tested also in Saarebrücken in Germany.