Performance indicators for complex wastewater pumping stations and pressure mains

With increasing energy costs, concern on CO₂ emission and growing interest in asset management, the online evaluation of pressurized wastewater systems provides an opportunity for optimizing performance. This paper describes a method that uses performance indicators (PIs) derived from monitoring data and model simulation results using an online system. Malfunctioning, or underperformance can be detected in an early stage, which enables to take measures in terms of replacement or reparation based on the actual status of the system rather than rely on the effectiveness of regular, scheduled, inspection. The city of Almere´s wastewater transport system is used as a case study and demonstrates the introduction, application and interpretation of these PIs as well as the obtainable reduction in energy consumption using on-line data on the systems behaviour.