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Numerical simulation of waste landfill biodegradation: Fitting experimental data
Simulación numérica de la biodegradación en rellenos sanitarios: ajuste de datos experimentales
DOI:
https://doi.org/10.15446/dyna.v91n234.113404Palabras clave:
waste landfill, biodegradation, mathematical modeling, methane generation (en)relleno sanitario, biodegradación, modelado matemática, generación de metano (es)
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Landfill remains economically viable for the disposal of Municipal Solid Waste (MSW), however, experiences of failure in several Colombian and global locations, lead to soil, water, and air pollution, harming ecosystems, and biodiversity. Numerical models can help improve the design by considering biodegradation, hydraulic, thermal, and mechanical phenomena involved in landfills. This paper presents a simulation of the landfill biodegradation, calibrating parameters to make results match experimental data from previous references. COMSOL Multiphysics was used to implement McDougall's biodegradation model, tracking organic matter transformation into volatile fatty acids (VFA) and methane (CH4) production via acetogenesis. Parameters taken from previous references were recalibrated to fit data from six US landfills. The results for the concentration variation with time for organic matter, VFA and CH4 successfully follows the expected behavior and fits the experimental data. McDougall's 2007 model, successfully implemented in COMSOL, can be calibrated for data from Colombian and global landfills.
Los rellenos sanitarios siguen siendo económicamente viables para la disposición de Residuos Sólidos Urbanos (RSU), sin embargo, experiencias de fallas en varios lugares de Colombia y el mundo, conducen a la contaminación del suelo, agua y aire, perjudicando los ecosistemas, y la biodiversidad. Los modelos numéricos pueden ayudar a mejorar el diseño considerando los fenómenos de biodegradación, hidráulicos, térmicos y mecánicos involucrados en los rellenos sanitarios. Este trabajo presenta una simulación de la biodegradación en rellenos sanitarios, calibrando los parámetros para que los resultados coincidan con los datos experimentales de la literatura técnica. Se utilizó COMSOL Multiphysics para implementar el modelo de biodegradación de McDougall, siguiendo la transformación de la materia orgánica en ácidos grasos volátiles (AGV) y la producción de metano (CH4) vía acetogénesis. Los parámetros tomados de referencias anteriores se recalibraron para ajustarlos a los datos de seis vertederos estadounidenses. Los resultados de la variación de la concentración con el tiempo para la materia orgánica, los AGV y el CH4 siguen satisfactoriamente el comportamiento esperado y se ajustan a los datos experimentales. El modelo de McDougall de 2007, implementado con éxito en COMSOL, puede calibrarse para datos de rellenos colombianos y mundiales.
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CrossRef Cited-by
1. Caio Henrique Buranello dos Santos, Sandro Lemos Machado, Michael Andrade Maedo, Roger Augusto Rodrigues. (2026). Numerical modeling of settlement and gas generation in biodegrading municipal solid waste: a systematic review for sanitary landfill applications. Waste Management, 211, p.115285. https://doi.org/10.1016/j.wasman.2025.115285.
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