As a technical expert or manager in the grain and oil processing industry, you may often encounter the issue of the oil color being too dark after pressing corn germ oil. This is not only a common problem but also a key factor affecting the quality and market competitiveness of your products. In this article, we will delve into the root causes of this problem and provide practical solutions.
There are mainly two factors that cause the oil color to be too dark after pressing: improper temperature control and non - standard moisture content of raw materials.
Temperature Control: Temperature plays a crucial role in the oil - pressing process. If the temperature is too high, it can lead to the oxidation of oils and fats, resulting in a darker color. For example, when the pressing temperature exceeds 90°C, the probability of oil oxidation increases significantly. On the other hand, if the temperature is too low, the oil extraction rate will be affected. The ideal temperature range for corn germ oil pressing is between 60 - 85°C.
Moisture Content of Raw Materials: The moisture content of corn germ also has a direct impact on the oil color. If the moisture content is too high, it can cause the oil to emulsify during the pressing process, making the oil color turbid. Generally, the moisture content of corn germ suitable for pressing should be controlled between 8% - 12%.
There are two main pressing processes: cold pressing and hot pressing, and they have different impacts on oil color and nutrient retention.
| Pressing Process | Oil Color | Nutrient Retention | Temperature Range |
|---|---|---|---|
| Cold Pressing | Light, clear | High, retains more nutrients | Below 60°C |
| Hot Pressing | Darker | Relatively low, some nutrients are lost due to high temperature | 60 - 85°C |
Use of Intelligent Temperature Control System: An intelligent temperature control system can dynamically adjust the pressing temperature according to the actual situation, avoiding the problem of oil oxidation and color deepening caused by blind heating. For example, it can automatically adjust the temperature within the range of 60 - 85°C according to the moisture content and pressing progress of the raw materials.
Raw Material Pretreatment: Before pressing, it is necessary to accurately detect the moisture content of the raw materials. If the moisture content is too high, the raw materials can be dried to make the moisture content reach the suitable range of 8% - 12%. Experienced engineers can quickly judge whether the moisture content of the raw materials is suitable for pressing through simple methods such as touch and observation.
Equipment Parameter Setting: Different production lines have different equipment configurations. For small - scale processing plants, the equipment parameters can be adjusted more flexibly according to the actual production volume. For large - scale grain and oil factories, it is necessary to ensure the stability and accuracy of the equipment parameters to ensure the consistency of product quality.
By effectively controlling the temperature, moisture content of raw materials, and equipment parameters, you can solve the problem of the oil color being too dark after pressing corn germ oil, improve production efficiency, and ensure product quality. If you want to learn more about the technical details and practical operation skills of corn germ oil pressing, please click here to access our official website's technical documents. We are committed to helping you enhance efficiency, guarantee quality, and reduce losses in the grain and oil processing process.
