Effect of hydrodynamic mixing conditions on wet oxidation reactions in a stirred vessel reactor

[Display omitted] •Wet oxidation as a multi-phase system is influenced by mixing hydrodynamics.•More solid degradation was achieved with increase in the mixing intensity.•Axial-radial flow pattern resulted in a higher degree of solid degradation. The aim of this study was to investigate the impact o...

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Bibliographic Details
Published in:Bioresource technology 2018-08, Vol.262, p.333-337
Main Authors: Baroutian, Saeid, Syed, Abdul Moiz, Munir, M.T., Gapes, Daniel J., Young, Brent R.
Format: Article
Language:English
Subjects:
acetic acid
chemical oxygen demand
Hydrodynamics
Hydrothermal processing
impellers
Mixing
organic carbon
Organic waste
oxidation
solid wastes
technology
Wet oxidation
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Summary:[Display omitted] •Wet oxidation as a multi-phase system is influenced by mixing hydrodynamics.•More solid degradation was achieved with increase in the mixing intensity.•Axial-radial flow pattern resulted in a higher degree of solid degradation. The aim of this study was to investigate the impact of mixing intensity and mixing flow patterns on solid waste degradation, and production of valuable intermediate by-products such as acetic acid. Total suspended solids generally decreased, soluble chemical oxygen demand, dissolved organic carbon, and acetic acid concentration generally increased with the progress of the reaction and increase in the mixing intensity. The results showed that axial-radial flow pattern (using pitch blade impeller) and medium impeller speed (500 rpm) resulted in a higher degree of solid degradation and production of acetic acid.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2018.05.029