Basic information of genipin

Genipin is usually prepared by extracting geniposide from Gardenia, hydrolyzing with β-glucosidase, extracting with ether, vacuum concentrating and recrystallization, or by microbial transformation. Content of geniposide in Eucommia ulmoides Oliv. Gardenia is relatively high, reaching about 3-8%. However, gardenia is easy to cultivate and has a large yield, so gardenoside is mainly produced from gardenia. According to the statistics of agricultural department in Fuzhou City, Jiangxi Province, the yield of fresh gardenia fruit per mu can reach 1000 kg. Gardenia jasminoides Ellis is especially suitable for special acidic red loam and warm and humid climate in hilly areas of eastern Jiangxi. In recent years, it has been widely planted in Linchuan District and Jinxi County of Fuzhou City. Due to technical problems, gardenia products are mainly sold as low value-added products such as dried gardenia fruit and crude gardenia yellow pigment. Therefore, it is urgent to study the comprehensive development technology of gardenia, especially the recycling technology of gardenia yellow waste liquid.