Mathematical modelling in diagnosis of wastewater treatment plant

Abstract

The paper reports the development of mathematical modelling in the diagnosis of the wastewater treatment plant (WWTP). Diagnosis of technical objects and/or biochemical processes control such as activated sludge systems in WWTP could be realized in many ways. One of the divisions of the diagnostic methods include modeling with or without a model of the object. The first of these is the analysis of the symptoms for which, based on the parameter values, the abnormality in the diagnosed objects are sought. Another way is to use models of objects undergoing diagnosis. In this case, the diagnosis comes down to a comparison of information from the response object model or the estimated parameters of the model with data from the real object. The aim of this study was to evaluate an innovative concept of the possible use the mathematical model and computer simulation in the diagnosis and control of activated sludge systems in WWTP. The first phase of this project involves creation and calibration of mathematical model of existing WWTP. By using MATLAB software the diagnosis software was created. The algorithm is based on a comparison of data from the mathematical model and measurements of the real date from WWTP, until it will detect any malfunction of the sensors in the case study. After detection of such abnormalities next step is to send information to the SCADA system, where the received data will decide, whether it is necessary to start further action related to the diagnosed sensor in WWTP.