How to refine groundnut oil?
Groundnut oil has attained the status of cooking medium of choice due to its embedded health benefits. Apart from its alluring strong aroma and universally liked peanut flavor, the all-purpose cooking oil brings multiple health benefits to the table. With an assured market and greater possibility of returns, setting up a groundnut oil processing plant becomes more and more popular. Then, the groundnut manufactured by pressing method or solvent extraction are both crude groundnut oil. How to refine groundnut oil and sell them in the supermarket?
The filtered crude groundnut oil will be pumped to the groundnut oil refinery plant where it shall pass through four stages of refining: degumming, deacidification(neutralization), decolorization(bleaching) and deodorization.
Degumming: To remove the content of colloidal impurities in the oil. Usually add P-acid or hot water to make the colloidal impurities sink and is separated out.
Neutralization: To reduce the level of free fatty acid (FFA) in the oil, caustic soda is mixed with the crude oil and the mixture is fed to a hydration tank. The neutralized oil may have trace of soap which is a by-product of the neutralization process. Therefore, the oil will be washed with water.
Bleaching: The neutralized oil is then pumped to the bleacher in which it is mixed with bleaching earth to improve the color of oil by the process called adsorption. At this stage, any undesirable impurities from the crude Groundnut oil are removed. This process improves the initial taste, final flavour and oxidative stability of the product. The bleached oil is then filtered to remove the bleaching earth leaving the oil with very low phosphorous levels and no soap.
Deodorization: The bleached oil, after being filtered, will be pumped to the deodorizer to avoid substances which are responsible for the odor of edible oil.
Henan Doing Company is a professional cooking oil making machine manufacturer in China, and can provide you full line of groundnut oil production machine and crude groundnut oil refining machine. Welcome to contact us!
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