Robust fractional control based on high gain observers design (RNFC) for a Spirulina maxima culture interfaced with an advanced oxidation process

In this article, the theory of fractional control and state estimation applied to biological science is studied, particularly in hybrid wastewater treatment. For nonlinear systems with stable and known states, an interconnected fractional robust control design with high gain state estimation is proposed to generate a control insensitive to nutritional perturbations originated by an advanced oxidation process in a microalgae culture. An online study is proposed for the mineralization of glyphosate and its feedback in a microalgae cultivation process where through the designed control the light dynamics is manipulated to robustly and automatically regulate the biomass signal provided by an analog sensor and nutrient estimation via state observers. In the literature, there are few results developed with real-time results. This work is a multidisciplinary study with online results where the performance and improvement of the proposed complex process are concluded.

Automated summary

In this article, the application of fractional control and state estimation in the field of biological science, specifically in hybrid wastewater treatment, is studied. The authors propose an interconnected fractional robust control design and high gain state estimation for nonlinear systems with stable and known states. They also propose an online study for the mineralization of glyphosate and its feedback in a microalgae cultivation process. The results of this multidisciplinary study with online results conclude the performance and improvement of the proposed complex process.