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Environmental Science and Pollution Research

, Volume 26, Issue 5, pp 4510–4520 | Cite as

CFD modeling of a UV-A LED baffled flat-plate photoreactor for environment applications: a mining wastewater case

  • John Steven Devia-Orjuela
  • Luis Andrés Betancourt-Buitrago
  • Fiderman Machuca-MartinezEmail author
Advanced Oxidation Technologies: State-of-the-Art in Ibero-American Countries
  • 190 Downloads

Abstract

The use of ultraviolet light in photoreactors for wastewater treatment has become popular as an alternative of known chemical oxidative substances. UV LED light represents cheaper, robust, and versatile alternative to traditional UV lamps. In this study, it was designed and evaluated a photoreactor with an approach of chemical fluid dynamics (CFD) and experimental validation. The evaluation consisted of (1) CFD velocity profile analysis, (2) characterization of the average light distribution with potassium ferrioxalate actinometry, (3) degradation of a typical recalcitrant metallic cyanocomplex Fe(CN)63−, and (4) scavenger effect analysis in the photodegradation using potassium persulfate. Actinometrical essay concluded that the system was able to receive 1.93 μE/s. The reactor operated under turbulent regime and best result for Fe(CN)63− degradation was obtained at 4 h of operation, using 5-W UV-A LEDs, with pH ~ 7 and 10 mM de S2O82−. Baffled photoreactor demonstrated to be useful for this type of illumination and wastewater treatment.

Keywords

Photoreactor UV LED Cyanocomplex CFD Actinometry Photodegradation 

Notes

Acknowledgments

Acknowledgements are given to the Project “Recuperación de oro y tratamiento de aguas residuales de minería aurífera CI 2832” funded by Colciencias and Universidad del Valle and the Young Researcher Program 2015 of Colciencias Francisco Jose Caldas.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • John Steven Devia-Orjuela
    • 1
  • Luis Andrés Betancourt-Buitrago
    • 1
  • Fiderman Machuca-Martinez
    • 1
    Email author
  1. 1.Escuela de Ingenieria QuímicaUniversidad del ValleCaliColombia

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