Sensor fault detection and diagnosis based on bilinear mass balances in wastewater treatment systems

With this paper we adapt the fundamental framework of data reconciliation for bilinear steady-state systems to solve the problem of fault detection and diagnosis in the context of full-scale wastewater treatment plants (WWTPs). The usefulness of this framework is illustrated using the BSM1_LT simulation platform to detect and identify faults in flow and TSS sensors. The results show that data reconciliation of bilinear systems is a powerful method to detect faults in the flow measurements but exhibits low performance for faults in the TSS sensors for the given sensor configuration.