Sensores virtuales basados en observadores para el monitoreo de cultivos de microalgas
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DOI:
https://doi.org/10.56845/rebs.v1i1.5Palabras clave:
microalgas, biodiésel, sensores virtuales, modelo matemáticoResumen
En este artículo se presenta un diseño de observador no lineal para la estimación simultánea de parámetros y variables de estado. El caso de estudio son los cultivos de microalgas para la generación de biodiésel, donde las tasas de reacción, la concentración de biomasa, la cuota intracelular y la concentración de nitrógeno son variables críticas que proporcionan información sobre el estado del proceso. Sin embargo, estas variables pueden ser difíciles de medir debido a la falta de instrumentos específicos, al elevado costo de los sensores o a la inviabilidad de su instalación en el proceso. Por ello, en este artículo se presentan dos sensores virtuales basados en observadores como alternativa analítica para realizar la estimación de las principales variables o parámetros importantes del proceso: un observador no lineal adaptativo y un observador no lineal de alta ganancia. Los observadores se basan en el modelo matemático de Droop que describe la capacidad de las microalgas para almacenar nutrientes y el desacoplamiento entre la absorción de sustrato y el crecimiento de la biomasa. Se realizan simulaciones numéricas para evaluar el rendimiento de los observadores propuestos.
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