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

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.

[1]  Omer Turksoy,et al.  Gain-phase margins-based delay-dependent stability analysis of pitch control system of large wind turbines , 2019 .

[2]  A Visioli,et al.  Application of SSOD-PI and PI-SSOD event-based controllers to greenhouse climatic control. , 2016, ISA transactions.

[3]  M. Beschi,et al.  Tuning rules for event-based SSOD-PI controllers , 2012, 2012 20th Mediterranean Conference on Control & Automation (MED).

[4]  E. Grima,et al.  Prediction of dissolved oxygen and carbon dioxide concentration profiles in tubular photobioreactors for microalgal culture , 1999, Biotechnology and bioengineering.

[5]  W. Oswald,et al.  Biological transformation of solar energy. , 1960, Advances in applied microbiology.

[6]  A. Visioli,et al.  Characterization of symmetric send-on-delta PI controllers , 2012 .

[7]  J. M. Fernández-Sevilla,et al.  Comprehensive model of microalgae photosynthesis rate as a function of culture conditions in photobioreactors , 2013, Applied Microbiology and Biotechnology.

[8]  Zhiwei Gao,et al.  Pitch control for wind turbine systems using optimization, estimation and compensation , 2016 .

[9]  Sigurd Skogestad,et al.  Optimal PI-Control and Verification of the SIMC Tuning Rule , 2012 .

[10]  Celaleddin Yeroglu,et al.  Computation of Stabilizing PI and PID Controllers using the Stability Boundary Locus , 2006 .

[11]  Manuel Berenguel,et al.  Control robusto con QFT del pH en un fotobiorreactor raceway , 2020 .

[12]  José Luis Guzmán,et al.  Modelling and Control Issues of pH in Tubular Photobioreactors , 2010 .

[13]  S. Skogestad.  Simple analytic rules for model reduction and PID controller tuning , 2004 .

[14]  M. Bilal Khan,et al.  Progress in energy from microalgae: A review , 2013 .

[15]  José Luis Guzmán,et al.  Application of a Symmetric-Send-On-Delta event-based controller for a microalgal raceway reactor , 2019, 2019 18th European Control Conference (ECC).

[16]  F. G. Acién,et al.  Dynamic model of an industrial raceway reactor for microalgae production , 2016 .

[17]  Marek Miskowicz,et al.  Send-On-Delta Concept: An Event-Based Data Reporting Strategy , 2006, Sensors (Basel, Switzerland).

[18]  Aidan O'Dwyer,et al.  Handbook of PI and PID controller tuning rules , 2003 .

[19]  F. G. Acién,et al.  Selective pH and dissolved oxygen control strategy for a raceway reactor within an event-based approach , 2015 .

[20]  José Luis Guzmán,et al.  Event-based predictive control of pH in tubular photobioreactors , 2014, Comput. Chem. Eng..

[21]  E. Molina Grima,et al.  Photobioreactors for the production of microalgae , 2013, Reviews in Environmental Science and Bio/Technology.

[22]  F. G. Acién,et al.  Effective utilization of flue gases in raceway reactor with event-based pH control for microalgae culture. , 2014, Bioresource technology.

[23]  E R WOLFORD.  Comparison of boric acid and lactose broths for the isolation of Escherichia coli from citrus products. , 1954, Applied microbiology.

[24]  F. G. Acién,et al.  Fluid-dynamic characterization of real-scale raceway reactors for microalgae production , 2013 .