Enhancing the Performance of a Simulated WWTP: Comparative Analysis of Control Strategies for the BSM2 Model

Bogdan Roșu, George Dănuț Mocanu (), Mihaela Munteanu Pila, Gabriel Murariu, Adrian Roșu and Maxim Arseni
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Bogdan Roșu: Faculty of Automation, Computer Sciences, Electronics and Electrical Engineering, “Dunărea de Jos” University of Galaţi, Domnească 47, 800008 Galaţi, Romania
George Dănuț Mocanu: Faculty of Physical Education and Sport, “Dunărea de Jos” University of Galați, Domneascǎ 47, 800008 Galați, Romania
Mihaela Munteanu Pila: Faculty of Engineering and Agriculture, “Dunărea de Jos” University of Galați, Domnească 47, 800008 Galați, Romania
Gabriel Murariu: Faculty of Sciences and Environment, REXDAN Research Infrastructure, “Dunărea de Jos” University of Galaţi, Domnească 47, 800008 Galaţi, Romania
Adrian Roșu: Faculty of Sciences and Environment, REXDAN Research Infrastructure, “Dunărea de Jos” University of Galaţi, Domnească 47, 800008 Galaţi, Romania
Maxim Arseni: Spinoff Geomax S.R.L., Albatrosului 2, 800029 Galați, Romania

Mathematics, 2023, vol. 11, issue 16, 1-22

Abstract: This study aimed to improve the performance of a wastewater treatment plant (WWTP) simulated with Benchmark Model No. 2 (BSM2). To achieve this objective, three control strategies were implemented and tested. The first control strategy aimed to maintain the concentration of nitrate and nitrite nitrogen (S NO ) by controlling the external carbon flowrate (strategy A 1 ), and the second control strategy aimed to maintain the ammonia and ammonium nitrogen (S NH ) at a desired level with the use of a cascade controller (strategy A 2 ). The third strategy was applied to control the total suspended solids (TSS) (strategy A 3 ). Combinations of these strategies were considered (B 1 , B 2 , and B 3 strategies), as well as the use of all three together (strategy C 1 ). The control strategies presented in this paper were compared to the default control strategy of BSM2 to validate and identify the one that provided the best performance. The results revealed that the B 1 strategy was the most environmentally friendly, while C 1 obtained the highest overall performance. Several Monte Carlo simulations were performed for the validated control strategies, to identify the optimal setpoint values. For the C 1 strategy, a second method of optimization regarding polynomial interpolation was considered. The applied optimization methods provided the optimal reference values for the PI (proportional integral) controllers.

Keywords: wastewater; control strategies; simulation; performance (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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