Active Control of Combined Sewer Systems Based on Flow and Water Quality

Discharges from urban wastewater systems are the main source of pollution for inland and coastal waters, and intermittent unsatisfactory discharges from combined sewer systems have been recognized as a major environmental concern. The aim of the research was to investigate active system control of an interceptor sewer system. The dynamic multiobjective optimization approach developed considered the unsteady flow and pollution load in the sewers and wastewater treatment costs. Contrary to previous approaches in the literature, the combined effect of the various primary contaminants was addressed by means of the effluent quality index.