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Open AccessArticle

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

1
Department of Mechanical and Industrial Engineering, University of Brescia, 25123 Brescia, Italy
2
Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, National Research Council of Italy, 20133 Milan, Italy
3
Department of Computer Science, University of Almería, 04120 Almería, Spain
*
Author to whom correspondence should be addressed.
Processes 2019, 7(5), 247; https://doi.org/10.3390/pr7050247
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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