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Rice Whitener

Views: 66     Author: Site Editor     Publish Time: 2023-08-16      Origin: Site

Rice Whitener

A rice whitener is a machine used in the rice milling process to remove the outer husk or bran layer from rice kernels, resulting in polished or white rice. The purpose of rice whitening is to improve the appearance, texture, and taste of the rice while also increasing its shelf life. Rice whitening is a crucial step in rice processing, especially for producing rice that is commonly consumed in many cultures.

Here are some key points about rice whitening and rice whiteners:

  1. Rice Milling Process: Rice milling involves several stages to transform harvested rice paddy into the edible rice grains that we are familiar with. Rice whitening is one of these stages.

  2. Husk Removal: The outer husk or bran layer of the rice kernel is removed during the whitening process. This process reduces the content of the bran, which contains fiber, minerals, and nutrients.

  3. Polishing: The rice kernels are not only whitened but also polished during this process. Polishing improves the appearance and texture of the rice grains, giving them a shiny and smooth surface.

  4. Abrasive Rollers: Rice whitening machines typically use abrasive rollers or milling stones that rub against the rice kernels, effectively removing the outer layers.

  5. Multiple Passes: In some cases, rice may go through multiple passes in a rice whitener to achieve the desired level of whiteness and polish. The number of passes depends on factors like the type of rice and the desired outcome.

  6. Quality Control: The rice whitening process needs to be carefully controlled to avoid damaging the rice grains or removing too much of the nutritious bran layer. Skilled operators adjust the settings of the rice whitener to achieve the right balance between whiteness and nutritional value.

  7. Rice Grades: Different grades of rice, ranging from regular polished rice to premium varieties, are produced based on the degree of whiteness and polish.

  8. Varieties of Rice Whiteners: Rice whiteners can vary in terms of size, capacity, efficiency, and technology. Modern rice mills often use advanced machinery for rice processing, including automated rice whiteners.

  9. Efficiency and Output: Efficient rice whiteners help rice mills increase their output by processing larger quantities of rice in less time.

  10. Industry Impact: Rice whiteners play a significant role in the rice processing industry, ensuring that rice reaches consumers in a form that's visually appealing and easy to prepare.


It's important to note that while rice whitening enhances the appearance of rice and can contribute to its taste and texture, it also removes some of the nutrients present in the bran layer. As a result, "brown rice," which retains the bran layer, is often considered to be more nutritious than polished white rice.


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