Peanut Oil Production Process and Operating Points
In order to ensure the nutrition, flavor, and safety of fragrant peanut oil and reduce the cost, we adopt a physical squeezed method in the peanut oil production line. And the features of the pressing line are: (1) Extraction adopts pure physical pressing method to completely avoids the contact of raw materials and chemical solvents throughout the entire production process; (2) To abolish the unfavorable refining process which affects the quality of finished oil, such as solvent leaching, alkali refining and deodorization, so as to ensure the natural nutrients in the refined oil. (3) The refined oil is stored in an underground storage and the cooling water coil technology is used to ensure long-term storage.
1. Production Processes
1.1 Raw Material
The raw material which is used to produce fragrant peanut oil is fresh, full-grained, undamaged, mildew-free, free of insects and has not undergone an aging period. Raw materials would be cleaned by removing immature, damaged, and moldy grains during the cleaning process.
1.2 Process Flow of Peanut Oil Production Line
1.3 Process Parameters and Procedures
Peanuts are cleaned and shelled, medium-sized peanuts are screened (about 25% of the treated amount), and the rest are large- and small-sized peanuts (about 75% of the treated amount). The large-sized and small-sized peanuts are broken, rolled and steamed. The medium-sized peanuts are crushed and cleaned by red skin eliminator, then being baked. Finally, the three sized materials are mixed and then pressed in the press to obtain the crude oil. After pressing, the oil is settled and filtered to produce a fragrant peanut oil.
1.4 Operating Points
1.5 Peanut Oil Storage
The appropriate condition for peanut oil storage is 8% moisture content and the temperature which does not exceed 20℃. Sealed storage can prevent the infection of pests and the influence of the outside temperature and humidity, which is conducive to maintaining a low temperature.
Peanut oil is stored at a temperature below 15℃ in a sealed container to prevent lipase hydrolysis and oxidation, and to avoid the increase in acid number and peroxide value. The average temperature of the ground below 4m is below 20℃, so the storage house is built underground.