Large scale strategy for the extraction of oil from sesame seed: scalable approach

Abstract

ABSTRACT In the present work, the scalable oil extraction strategy using a hybrid approach of soaking pretreatment, followed by ultrasound extraction has been studied. Ultrasound-assisted extraction is the emerging method for the extraction of oil from seeds, but the higher energy consumption is a major challenge associated with the scale-up. In the present study, the combined approach of pretreatment and ultrasound-assisted extraction has been explored to overcome this issue. The combined approach of oil extraction reduces the energy consumption from 7.063 kJ/gm of oil to 1.089 kJ/gm of oil and reduces the ultrasound treatment time from 15 min to 4 min when compared with ultrasound without pretreatment. The maximum oil extraction yield of 99.1% and treatment time of 4 min in a combined approach of heat soaking (70 °C, 60 min, 50% w/v solid loading) followed by ultrasound-assisted extraction (45 W, 4 min, and 50% duty cycle) makes the process a scalable approach for continuous oil extraction using flow cells. The required processing capacity of an ultrasound plant for processing 1-ton raw material per day is 2.777 kg/batch, which is 3.75 and 120.03 times as compared to ultrasound without pretreatment (10.416 kg/h) and Soxhlet method (333.33 kg/batch). GRAPHICAL ABSTRACT