화학공학소재연구정보센터
Chinese Journal of Chemical Engineering, Vol.25, No.12, 1791-1797, 2017
A data-derived soft-sensor method for monitoring effluent total phosphorus
The effluent total phosphorus (ETP) is an important parameter to evaluate the performance of wastewater treatment process (WWTP). In this study, a novelmethod, using a data-derived soft-sensormethod, is proposed to obtain the reliable values of ETP online. First, a partial least square (PLS) method is introduced to select the related secondary variables of ETP based on the experimental data. Second, a radial basis function neural network (RBFNN) is developed to identify the relationship between the related secondary variables and ETP. This RBFNN easily optimizes the model parameters to improve the generalization ability of the soft-sensor. Finally, a monitoring system, based on the above PLS and RBFNN, named PLS-RBFNN-based soft-sensor system, is developed and tested in a real WWTP. Experimental results show that the proposed monitoring system can obtain the values of ETP online and own better predicting performance than some existing methods. (c) 2017 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.