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Improve the output of the rice mill
Provided that the quality of paddy received at the rice mill is good, the best quality milled rice will be attained from a mill if a number of guidelines are followed.
1. Related to raw material
- Mill at the right moisture content
- Pre-clean paddy before husking
- Do not mix varieties prior to milling
2. Technology
- Use rubber roll technology for husking
- Use a paddy separator
- Consider two-stage whitening
- Grade the milled rice
3. Management
1. Paddy
Mill at the right moisture content (MC)
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A moisture content of 14% MC is ideal for milling. If the MC is too low, high grain breakage will occur resulting in low head rice recovery. Broken grain has only half the market value of head rice. Use a moisture meter to determine the moisture content. Visual methods are not accurate enough. |
Pre-clean paddy before husking
Use of paddy without impurities will ensure a cleaner and higher quality end product.
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Do not mix varieties prior to milling.
Different varieties of paddy have different milling characteristics that require individual mill settings. Mixing varieties will generally lead to lower quality of milled rice.
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2. Technology
Use rubber roll technology for husking
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 Rubber roll huskers produce the best quality. Engleberg-type or "steel" hullers are no longer acceptable in the commercial rice milling sector, as they lead to low milling recovery and high grain breakage. |
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Use a paddy separator
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Separate all paddy from the brown rice before whitening. Paddy separation after husking will lead to better quality milled rice, and reduce overall wear and tear on the rice mill. |
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Consider two-stage whitening
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Having at least two stages in the whitening process (and a separate polisher) will reduce overheating of the grain and will allow the operator to set individual machine settings for each step. This will ensure higher milling and head rice recovery. |
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Grade the milled rice
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Installl a screen sifter to remove small brokens and chips from the polished rice. Rice with a large number of small brokens (or brewer’s rice) has a lower market value. The small brokens can be utilized to produce rice flour. |
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3. Management
Monitor and replace spare parts regularly
Turning or replacing rubber rolls, refacing stones, and replacing worn screens regularly will keep milled rice quality high at all times.
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