Guanxi pomelo is a kind of well known traditional fruit in Pinghe County, and one of the famous varieties of pomelo in China. In 2009, 43000 hm2 of Guanxi pomelo has planted in the whole county, with 800000 tons of annual output and increasing year by year. As a result, more and more pomelo is used to process. High content of essential oil and pigments is in the external part of pomelo peel. By extracting essential oil and pigments, it will not only improve the added-value of Guanxi pomelo, but also reduce ...