A higher inlet air temperature during spray drying caused a
faster drying rate that resulted in lower powder moisture content
and a higher process yield. Moreover, a higher inlet air temperature
can improve the angle of repose, solubility and dispersibility of
anthocyanin powders. The powder produced using a higher inlet
air temperature provides larger particles with smoother surfaces,
which can protect against oxidative degradation during storage
better than a shriveled surface. However, a higher inlet air temperature
also caused a reduction in anthocyanin retention. We
recommend the combination of 180 C inlet air temperature and
BRM20 for microencapsulation of BGR bran anthocyanin. The
anthocyanin powders produced under these processing conditions
showed higher efficiency and better reconstitution properties than
the anthocyanin powder produced by commercial maltodextrin
(CM10). BRM20 is recommended for the production of anthocyanin
powder by freeze drying. Freeze dried anthocyanin powders
showed the good properties in terms of bulk density, angle of
repose, process yield and anthocyanin retention. However, the high
operating cost of freeze drying should be considered. Our results
suggested that maltodextrin produced from broken black glutinous
rice (BRM20) can replace the commercial maltodextrin for anthocyanin
microencapsulation.