Pre-germinated parboiled brown rice or Khao
hang (in Thai) is paddy which undergoing the processes of
soaking, steaming, drying and dehusking to obtain the edible
form for consumption. The objectives of this research were to
study the kinetic of pre-germinated parboiled brown rice
drying using fluidization technique and to study the properties
of pre-germinated parboiled brown rice after drying. The
dryings were performed at the different temperatures of 110,
120 and 130 o
C at the bed depth of 2 cm with the air velocity
of 1.98 m/s. The results found that the higher drying
temperature led to the faster moisture reduction. After drying
until the moisture content of pre-germinated parboiled brown
rice was lower than 14%wet basis, samples were taken to
determine various qualities such as percentage of head rice
and L* a* b* color values. The shade drying was used as a
control. The results found that the higher drying temperature
resulted in the decrease of head rice percentage. For the color
assessment, the trend of L* and a* values was increased with
the drying temperature, while the b* value was not
significantly difference (p › 0.05) by drying temperatures.
However, the b value of drying by fluidized bed dryer was
higher than the control.
Pre-germinated parboiled brown rice or Khaohang (in Thai) is paddy which undergoing the processes ofsoaking, steaming, drying and dehusking to obtain the edibleform for consumption. The objectives of this research were tostudy the kinetic of pre-germinated parboiled brown ricedrying using fluidization technique and to study the propertiesof pre-germinated parboiled brown rice after drying. Thedryings were performed at the different temperatures of 110,120 and 130 oC at the bed depth of 2 cm with the air velocityof 1.98 m/s. The results found that the higher dryingtemperature led to the faster moisture reduction. After dryinguntil the moisture content of pre-germinated parboiled brownrice was lower than 14%wet basis, samples were taken todetermine various qualities such as percentage of head riceand L* a* b* color values. The shade drying was used as acontrol. The results found that the higher drying temperatureresulted in the decrease of head rice percentage. For the colorassessment, the trend of L* and a* values was increased withthe drying temperature, while the b* value was notsignificantly difference (p › 0.05) by drying temperatures.However, the b value of drying by fluidized bed dryer washigher than the control.
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