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Whitener

Also called: rice whitener, rice whitener machine, rice whitening machine, emery whitener

Step 6 of 8: Whitening and polishing

Abrasive stones or rollers that take the bran layer off brown rice, a little at a time, until the rice is as white as the buyer wants.

Availability subject to feasibility check

Prices depend on the specification and the supplier. Request a quote.

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Example of a Whitener
Example of this machine type, not a specific model we supply.Photo: katorisi, CC BY 2.5, commons.wikimedia.org, edited

Whitener: how it works

  1. Brown rice enters a chamber between a turning roll and a screen around it.
  2. In an abrasive whitener the rough emery surface of the roll scrapes the bran off; in a friction whitener the grains rub against each other under pressure.
  3. The bran passes out through the screen and is drawn away by air, which also cools the rice.
  4. A weight on the outlet sets how hard the rice is milled, and so how white it comes out.

Main types

Abrasive (emery) whitener
An emery stone roll, vertical or horizontal. Works at low pressure, so it breaks fewer grains.
Friction whitener
A steel roll presses the grains against each other. It gives a smooth surface and is often the last pass.
Multi-pass whitening
Two or three whiteners in a row each take off a little bran, which keeps the rice cool and whole.

Where it fits in the process

It follows the paddy separator. Brown rice comes in, white rice goes on to the polisher and the graders, and the bran is collected for sale.

Whitener price in Bangladesh: how to get a quote

We do not publish prices. The price of a machine depends on its specification, the supplier and the shipping terms, and it changes with the market. Tell us the points below: we check feasibility and the import rules, then send you a quotation.

What to tell us

  • Raw or parboiled rice, and the grain type.
  • How much brown rice passes in an hour.
  • How white your market wants the rice.
  • One machine or a line of several passes.
  • New or reconditioned.
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Common questions

What does a rice whitener do?

It takes the brown bran layer and the germ off the husked grain, which turns brown rice into white rice. How much bran it removes decides both the whiteness and how much rice is left to sell.

What is the difference between a whitener and a polisher?

The whitener removes the bran layer. The polisher comes after it and only cleans and smooths the surface of rice that is already white, usually with a fine mist of water.

What is the price of a rice whitener machine in Bangladesh?

We do not publish prices. The price depends on abrasive or friction type, how much rice it must mill in an hour and whether the machine is new or reconditioned. Send us the points listed above and we will quote.

More machines in this step: Whitening and polishing

  • Polisher

    A friction chamber, often with a fine water mist, that smooths the surface of white rice and gives it an even shine.

    Availability subject to feasibility check

    Request this machine