This chapter covers the technology used for processing peanut oil. It starts by explaining the pretreatment technology and peanut pressing technology for high temperature and cold pressing peanut oil. It then discusses the peanut oil extraction technology, which includes leaching and separation technology.
What is cold pressed peanut oil?
Cold pressed peanut oil is composed mostly of unsaturated fatty acids, predominantly oleic and linoleic acids. Moreover, the oil is also rich in bioactive components such as tocopherols, phenolic acids, and phytosterols. Cold pressed peanut meal, also known as defatted peanut meal or pressed peanut meal, is a by-product of peanut oil extraction.
What equipment is used for cold pressing of peanut oil?
Figure 3.8 shows the equipment used for cold pressing of peanut oil. First, a sheller is used to shell the peanuts. Then, the peanut kernels are transported to the low-temperature drying oven for drying after being subjected to precleaning, gravity/magnetic separation, and de-stoner cleaning.
How is cold pressed peanut oil extracted?
Commercial cold pressed extraction of peanut oil is carried out using a twin-screw press at temperatures below 60°C ( Wang, Liu, Hu, et al., 2016; Zheng, Ren, Su, Yang, & Zhao, 2013 ). Lastly, a frame filter is used to press and filter three times under 30°C to obtain the cold pressed peanut oil ( Wang, Liu, Hu, et al., 2016 ).
