Oil extraction from spent coffee grounds using manual extraction by employing methanol as a solvent / Nurul Khairiah Zawani Kamarudin

Spent Coffee Grounds is a waste that resulted from the coffee brewing process. Various research has been done in the past on how to convert the SCGs into valuable materials as the composition in the SCG making it possible to be applied in a whole lot of applications since this waste is contributing a lot to the landfills problem around the globe. In this study, the oil extraction from spent coffee grounds (SCGs) were conducted using the parameters of coffee oil extraction times by employing methanol as a solvent. The manual extraction method that includes extraction and separation process was utilized when doing the experiment. Approximately, 7.07 wt% oil yield could be obtained from the DSCG under the optimal conditions of 30 minutes extraction time. In this study, the miscella from up to six successive extractions was investigated to determine the optimal oil extraction process as well as the free fatty acid (FFA) content in the oil. The results obtained showed a similarity in the data gathered from previous research.