Edible Oil Refinery

Edible Oil Refinery is essential to ensure removal of Gums, Waxes, Phosphatides and Free Fatty Acids (F.F.A.) from the oils.There are two kinds of edible oil refinery plants of KMEC,Continuous one and batch one.For capacities higher than 30T/24hours Continuous Refining Process is recommended against Batch Refining.
Edible Oil Refinery

Edible Oil Refinery usually comprise of following steps:
flowchart for continous edible oil refinery

1.Pretreatment / Degumming Section
Here the oils are given acidic treatment where by gums are precipitated and separated out by centrifugal separation or sometimes only gum conditioning is carried out (when gum content is low) and gums are separated in subsequent neutralising process.
2.Neutralising Section
The pretreated oil is subjected to Alkali Refining. The caustic soda reacts with Free Fatty Acids (F.F.A.) present in the oil and forms soap stock, the soap stock is separated out by centrifugal separator, oil is washed with water for complete removal of soap stock. The wash water is separated out by centrifugal separators.
3.Bleaching Section
The neutralized oil is treated with bleaching earth/activated carbon for removal of colouring pigments. The bleaching agent is filtered out in vertical pressure leaf filters. Troika design ensures uniform consistency in colour with minimum requirement of bleaching agent. The bleaching line is versatile and adoptable for all varieties of vegetable oils.

flowchart for Bleaching 

4.Deodorization Section
As the name suggest process is meant for removal of odour. Every vegetable oil has its own distinct natural odour. During neutralization and bleaching operation unpleasant odour is imparted to the oil, it is therefore essential to remove this odour. The deodorisation is essentially a process of removal of odiferous matter. The operation is carried out at high temperature by injecting open steam and maintaining high vacuum at which time all odoriferous matter is distilled off and carried away to barometric condensers through vacuum system. The resultant oil is odourless – deodorized oil.
flowchart of deodorization

5.Dewaxing Section
Oils like sunflower oil or maize germ oil (corn oil) have waxes present in them. At low temperature these waxes gives hazy appearance to oil, which is not liked by consumers. It is therefore essential to remove these waxes prior to bottling and marketing of oil. Troika offers dewaxing units.
Physical Process
of Edible Oil Refinery
For oils like palm oil there is no necessity to go for alkali refining. After pretreatment of oil the oil is deodorized cum physically refined. The Free Fatty Acid (F.F.A.) present in the oil is distilled off at high temperature and high vacuum. Troika offers physical refining system also.
For any of your edible oil refinery requirement , whether batch or continuous Alkali Refining or Physical Refining, KMEC is at your service for more information. Contact us in the form following.