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Axial mixing in rotating drums using magnetic resonance imaging using bran as a model for solid state fermentations |
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| Authors: | Matthew T. Hardin Tony Howes David A. Mitchell Andrew K. Whittaker |
| Affiliation: | (1) Chemical and Materials Engineering Department, University of Auckland, Private Bag 92019, Auckland, New Zealand, 98 373 7463;(2) Department of Chemical Engineering, University of Queensland, St Lucia, Qld, 4072, Australia;(3) Departamento de Bioquímica, Universidade Federal do Paraná, Cx. P. 19046, 81531-990 Curitiba, Parana, Brazil;(4) Centre for Magnetic Resonance, University of Queensland, St Lucia, Qld, 4072, Australia |
| Abstract: | Magnetic resonance imaging (MRI) is an easily automated, reliable technique to investigate axial mixing within rotating drums. Moist bran can be clearly differentiated from dry bran using MRI allowing a non-segregating tracer for axial mixing. For a 20-cm diameter drum, the axial dispersion coefficient in the particle bed was 0.51 cm s–2. Axial dispersion is scale-dependent. |
| Keywords: | axial dispersion coefficient magnetic resonance imaging mixing rotating drum solid statefermation model |
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