Rice Bran Oil Refinery Plant

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Introduction To Rice Bran Oil Processing Technology

Rice bran oil is normally refined by physical method to keep the oryzanol in the refined oil. In chemical process oryzanol get destroyed by alkali.

  • Degumming
  • Pre Bleaching
  • Dewaxing
  • Winterization (Optional)
  • Post Bleaching
  • Deodorization

Degumming Of Rice Bran Oil

Degumming eliminates phospholipids so as to enhance its physical stability. The process is necessary also to facilitate further steps in refining. Phospholipids can treat dark coloured oil and they can also serve as precursors of oil off -flavour. Free fatty acids, pigments and other impurities are also partially removed by degumming.

Generally, refining process is necessary steps for the production of edible oils and fats products. The qualities of the finished product that need to be monitored are flavour, shelf-life, stability and colour of the products.

The impurities have to be removed in the early refining stage for two main reasons. As these cause high refining losses because of their emulsifying properties. They decompose, and darken the oil because of their thermal instability.

Types Of Degumming Suitable For Rice Bran Oil

  • Acid degumming
  • Enzymatic Degumming

Pre Bleaching Of Rice Bran Oil

“Bleaching” is a process of selective removal of pigments and impurities by the physical and chemical interaction of an adsorbent with an oil or fat to improve its quality. This process refers to the art of removing

  • Colour pigments
  • Dirt, Trace metals
  • Removal of polycyclic Aromatic compounds
  • Phospholipids
Rice Bran Oil RefineryRefined Rice Bran Oil Production

Dewaxing Of Rice Bran Oil

Dewaxing of oil is a process of eliminating higher melting point constituents like waxes or triglycerides from oil by gradually cooling vegetable oils and separating saturated glycerides from the oil. Normally Dewaxing process carried out at higher temperature (18-20 °C) to avoid the crystallization of saturated triglycerides & amalgamation of waxes & saturated triglycerides.


Waxes & Saturated triglycerides which are fairly visible at low temperature are removed in this process to keep the appearance oil clean transform Degummed, Bleached & Dewaxed oil is cooled and filtered to achieve the quality.

Post Bleaching Of Rice Bran Oil

Post Bleaching process is required the oil colour and phospholipids which were not removed completely in earlier processes. This process refers to the art of removing

  • Colour pigments
  • Dirt, Trace metals
  • Removal of polycyclic Aromatic compounds
  • Phospholipids

Deodorization Of Rice Bran Oil

Deodorization achieves vacuum stripping by passing a specific amount of a stripping agent (usually steam) for a specific time through hot oil at low pressure. The mainly a physical process removes various volatile components.

Process Steps Of Deodorization

Deodorization is a multi-step process comprising which are as follows

  • De-aeration
  • Heating
  • Deodorization cum De-acidification
  • Cooling of the oil