Characteristics of One-Pass Vertical Friction-Type Rice Whitener (I)

—Effect of configuration of whitening screen—

Abstract

One-pass vertical friction-type rice whitener was evaluated by introducing a whitening index defined as the ratio of the vertical resistance exerted by the whitener and the rice flow rate. As a result, there existed a curvilinear relationship between the flow rate and the vertical resistance.
The configuration of the whitening screen did not affect much the characteristics of this whitener although the hexagonal screen exhibited a relatively higher performance compared with the rest.
Also, the angle of slit has no significant effect over the characteristics of this whitener.