Innovation in Hazardous Waste Treatment in Uruguay:

experimental study of smouldering combustion of hydrocarbon-contaminated soils

Authors

  • Mirian Elizabeth Casco Grupo de Materiales, Energía y Medioambiente, Departamento de Ingeniería, Universidad Católica del Uruguay, Montevideo, Uruguay https://orcid.org/0000-0002-7189-3497
  • Santiago Lassus Gerpe Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay https://orcid.org/0009-0003-4020-7321
  • Martín Torres Brunengo Laboratorio de Energías Renovables, Instituto Polo Tecnológico de Pando, Facultad de Química, Universidad de la República, Pando, Canelones, Uruguay. Área Fisicoquímica, DETEMA, Facultad de Química, Universidad de la República, Montevideo, Uruguay https://orcid.org/0000-0002-1254-6305
  • Andrés Cuña Suárez Laboratorio de Energías Renovables, Instituto Polo Tecnológico de Pando, Facultad de Química, Universidad de la República, Pando, Canelones, Uruguay. Área Fisicoquímica, DETEMA, Facultad de Química, Universidad de la República, Montevideo, Uruguay https://orcid.org/0000-0002-1343-2772

DOI:

https://doi.org/10.26461/30.04

Keywords:

environmental remediation, sustainable technology, low-energy process, hazardous material, valorization

Abstract

This study presents the experimental investigation of self-sustained smouldering (SSS) applied to the treatment of hydrocarbon-contaminated soils. A laboratory-scale smouldering reactor was employed. Four mixtures with different proportions of auxiliary fuel were evaluated, analysing the self-sustainability of the process, hydrocarbon removal, and the associated energy cost. The residue was characterised through elemental analysis, proximate analysis, thermogravimetry, and determination of the calorific value. The results demonstrated the need for an auxiliary fuel to initiate the SSS reaction. Spruce sawdust was selected for this purpose, and four mixtures containing sand and contaminated soil (M1, M2, M3, and M4) were prepared to assess their influence on process self-sustainability. The results indicate that mixture M4, containing 10 % sawdust and 90 % contaminated soil, is SSS and achieved a 95.23 % hydrocarbon removal. Additionally, the cost analysis estimated a value of 0.3224 USD/kg of treated residue, highlighting the economic viability of the technology and broadening the available options for final waste disposal. The implementation of smouldering combustion in Uruguay represents an efficient and accessible alternative for the management of hazardous waste, reducing dependence on conventional methods and promoting innovative solutions.

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References

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Published

2025-12-02

How to Cite

Casco, M. E., Lassus Gerpe, S. ., Torres Brunengo, M., & Cuña Suárez, A. (2025). Innovation in Hazardous Waste Treatment in Uruguay:: experimental study of smouldering combustion of hydrocarbon-contaminated soils. INNOTEC, (30 jul-dic), e683. https://doi.org/10.26461/30.04

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