Mejoramiento del desempeño hidrodinámico de un digestor anaeróbico de laguna cubierta mediante CFD//Improving the hydrodynamic performance of a covered lagoon anaerobic digester by CFD

Autores/as

  • Ricardo Adolfo Martínez-García Posgrado en Ingeniería Agrícola y Uso Integral del Agua, Universidad Autónoma Chapingo, Chapingo, México, 56230
  • Teodoro Espinosa-Solares Posgrado en Ingeniería Agrícola y Uso Integral del Agua, Universidad Autónoma Chapingo, Chapingo, México, 56230 https://orcid.org/0000-0002-7581-0249
  • Jorge Flores-Velázquez Instituto Mexicano de Tecnología del Agua. Paseo Cuauhnahuac 8532, Jiutepec, Morelos. México. 7773293600 https://orcid.org/0000-0003-0895-4645
  • Abraham Rojano-Aguilar Posgrado en Ingeniería Agrícola y Uso Integral del Agua, Universidad Autónoma Chapingo, Chapingo, México, 56230 https://orcid.org/0000-0002-8715-7814
  • Omar Reséndiz-Cantera Posgrado en Ingeniería Agrícola y Uso Integral del Agua, Universidad Autónoma Chapingo, Chapingo, México, 56230
  • Abraham Jesús Arzeta-Ríos Posgrado en Ingeniería Agrícola y Uso Integral del Agua, Universidad Autónoma Chapingo, Chapingo, México, 56230 https://orcid.org/0000-0002-8242-6763

DOI:

https://doi.org/10.18633/biotecnia.v22i1.1125

Palabras clave:

PIV, modelo a escala, espacio muerto, Mezclado, digestión

Resumen

La digestión anaeróbica de residuos de explotacionespecuarias presenta beneficios tales como, la reducción de olores y agentes patógenos, la producción de biogás y biofertilizantes. La producción de metano está influenciada, entre otros factores, por el desempeño hidrodinámico del digestor. El objetivo de esta investigación fue construir y validar un modelo numérico basado en Dinámica de Fluidos Computacional (CFD), a partir de un prototipo de un digestor anaeróbico de laguna cubierta. Las simulaciones del modelo en CFD fueron realizadas a partir de las características del reactor y las propiedades del fluido de trabajo. Para comprobar la concordancia del modelo, los resultados numéricos se relacionaron con datos experimentales generados mediante Velocimetría de Imágenes de Partículas (PIV) en un modelo a escala del digestor original. Con el modelo validado, se simularon cuatro alternativas de diseño. Los resultados mostraron mayor eficiencia del patrón de flujo al incluir recirculación. La reducción de espacio muerto entre configuraciones propuestas con respecto al original osciló entre 12,7-19,2%. La configuración de mejor desempeño hidrodinámico fue con recirculación de 2/3 de la alimentación en la entrada original y el otro tercio la distancia de 12 m y con un ángulo de 90° respecto a la línea de entrada.

ABSTRACT

Anaerobic digestion of livestock waste has benefits such as reduction of odours and pathogens, production of biogas and biofertilizers. Methane production is influenced, among other factors, by the hydrodynamic performance of the digester. The objective of this research was to construct and validate a numerical model based on Computational Fluid Dynamics (CFD), from a prototype of a covered lagoon anaerobic digester. CFD model simulations were performed from reactor characteristics and working fluid properties. To check the agreement of the model, the numerical results were related to experimental data generated by Particle Imaging Velocimetry (PIV) in a scale model of the original digester. With the validated model, four design alternatives were simulated. The results showed greater efficiency of the flow pattern by including recirculation. The reduction in dead space between proposed configurations with respect to the original, ranged from 12.7-19.2%. The best hydrodynamic performance configuration was with recirculation of 2/3 of the feed at the original inlet and the other third at 12 m and at an angle of 90° to the input line.

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Publicado

2019-10-18

Cómo citar

Martínez-García, R. A., Espinosa-Solares, T., Flores-Velázquez, J., Rojano-Aguilar, A., Reséndiz-Cantera, O., & Arzeta-Ríos, A. J. (2019). Mejoramiento del desempeño hidrodinámico de un digestor anaeróbico de laguna cubierta mediante CFD//Improving the hydrodynamic performance of a covered lagoon anaerobic digester by CFD. Biotecnia, 22(1), 56–66. https://doi.org/10.18633/biotecnia.v22i1.1125

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