BS is an air-friction whitener. It's used for transforming brown rice into white rice by removing the bran from the surface.
No experience is needed as machine operation is smooth and easy. The bran layer on the grain surface is uniformly removed by friction generated among the grains guaranteeing uniformly whitened rice with a smooth and lustrous surface.

Brown rice is whitened by friction among the rice grains generated as they pass through the clearance between the screen and the milling roller.
The bran layer of the brown rice is removed by the action of grains rubbing together. Jet air is blown from the fan, passing through the hollow part of the main shaft and is flowed into the milling chamber.
Its function is to cool the rice grains and to blow off free bran from the whitened rice.