The impurities in the oil consist of granular, resinous, seed, and pulp. It is worth mentioning that the moisture in the good oils is usually absorbed by colloidal materials and usually does not affect the quality of the oil, but it is more dangerous when these impurities are fermentable, Which contributes to the dismantling of the oil molecules and therefore the removal of sediment is very necessary. These sediments are usually disposed of by filtration. However, since the filtration process leads to the intensity of the oil ventilation, this method should be used before putting the oil on the market to eliminate the negative effects of air oxygen during storage. The center of the center consists of the cylinders of the bottom of the sieve distributed over a layer of waterproof cotton.