Biotechnology Letters, Vol.24, No.7, 521-525, 2002
Axial mixing in rotating drums using magnetic resonance imaging using bran as a model for solid state fermentations
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