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Open AccessArticle

Daytime/Nighttime Event-Based PI Control for the pH of a Microalgae Raceway Reactor

Department of Mechanical and Industrial Engineering, University of Brescia, 25123 Brescia, Italy
Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, National Research Council of Italy, 20133 Milan, Italy
Department of Computer Science, University of Almería, 04120 Almería, Spain
Author to whom correspondence should be addressed.
Processes 2019, 7(5), 247;
Received: 12 March 2019 / Revised: 18 April 2019 / Accepted: 19 April 2019 / Published: 28 April 2019
In this paper, a new solution to improve the traditional control operation of raceway microalgae reactors is presented. The control strategy is based on an event-based method that can be easily coupled to a classical time-driven proportional-integral controller, simplifying the design process approach. The results of a standard Proportional-Integral (PI) controller, as well as of two event-based architectures, are presented in simulation and compared with each other and with traditional On/Off control. It is demonstrated that the event-based PI controller—operating during the whole day instead of only during daytime—achieves a better performance by reducing the actuator effort and saving costs related to gas consumption. View Full-Text
Keywords: microalgae; raceway; control problem; PID; event-based microalgae; raceway; control problem; PID; event-based
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Rodríguez-Miranda, E.; Beschi, M.; Guzmán, J.L.; Berenguel, M.; Visioli, A. Daytime/Nighttime Event-Based PI Control for the pH of a Microalgae Raceway Reactor. Processes 2019, 7, 247.

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