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.
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 ).
What technology is used in peanut oil production?
The production of peanut oil involves several technologies. It starts with pretreatment technology and peanut pressing technology for high temperature and cold pressing. The oil is then extracted using leaching and separation technology. At the end of the process, the peanut oil production line and the relevant key equipment are discussed. (Section 3.1)
What is the production flow of cold pressing peanut oil?
The production flow of the cold pressing process of peanut oil is shown in Fig. 3.3. The temperature rises from 60 to 90°C during the process, and the oil/residual oil ratio of the system decreases gradually, reaching 4.5% at 90°C (as shown in Fig. 3.4).