earticle

영어

In this study, the effective active ingredients of coffee waste extract and the caffeine content of coffee waste were confirmed using a high pressure hydrothermal extraction method to confirm the potential of coffee waste as a circular resource and a recycling material. In order to determine whether extraction of coffee waste affects caffeine reduction, ethanol content was soaked at room temperature for 48 hours at ratios of 0%, 30%, 50%, 70%, 100%, and then extract by high pressure hydrothermal extractor. As a result of quantitative analysis of caffeine on coffee waste using LC-MS, a caffeine reduction rate of 54.7% was confirmed in the coffee waste recovered after extraction with 70% ethanol hydrothermal extractor. Additionally, based on the results of a preliminary experiment that confirmed the highest caffeine reduction rate in high pressure hydrothermal extracted coffee waste with 70% ethanol content, in this experiment, extraction was repeated 3 times using coffee waste with 70% ethanol content in the same method as the preliminary experiment proceeded. Based on the results of a previous experiment that confirmed the highest caffeine reduction rate in hot water-extracted coffee waste with ethanol content of 70% in this experiment additional extraction was repeated three times using coffee waste with an ethanol content of 70% using the same method as the previous experiment. As a result of quantitative analysis of caffeine in coffee waste using LC-MS in this experiment, a high reduction rate of 98.7% of caffeine content was confirmed to be removed from coffee waste recovered by repeated extraction with 70% ethanol three times. The Korean Ministry of Food and Drug Safety confirmed that decaffeination, which removes 90% of the caffeine content, is possible with just two repeated experiments of coffee bean extraction. Therefore, it is expected that application to decaffeinated recycled products will be possible through repeated extraction of coffee grounds, which are discarded waste.