Enhanced Oxygen Volumetric Mass Transfer in a Geometrically Constrained Vortex

Luewton L.F. Agostinho, Rene Pecnik, Jakob Woisetschläger, Esther de Kroon, Nicolae Şişcanu, Maarten V. van de Griend, Willibald Loiskandl, Elmar C. Fuchs*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Aeration is one of the most cost intensive steps in water and wastewater treatment due to the large energy requirement for the creation of large surfaces for sufficient gas exchange as well as for providing efficient liquid transport in order to exchange saturated liquid elements at the surface with unsaturated ones from the bulk. In this work we show that geometrically constrained vortices in a hyperbolic funnel are a promising aeration technique as they meet these criteria and allow oxygen transfer coefficients up to 50 h−1, a number significantly higher than that of comparable methods like air jets or impellers (<10 h−1).

Original languageEnglish
Article number771
Number of pages8
JournalWater (Switzerland)
Volume14
Issue number5
DOIs
Publication statusPublished - 2022

Keywords

  • Aeration systems
  • Hyperbolic funnel
  • Oxygen diffusion
  • Vortex

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