Optimization of ultrasound and microwave assisted oil extraction from sea buckthorn seeds by response surface methodology

Abstract

Sea buckthorn (SB) seeds were used as raw material to obtain SB oil using two extraction methods: ultrasound and microwave assisted extraction. The favorable experimental conditions that maximize the extraction efficiency were investigated by applying response surface methodology (RSM). The selected key independent variables were ultrasonic intensity (UI), temperature, and time for ultrasound assisted extraction (UAE) and microwave power, time, and solid/liquid ratio for microwave assisted extraction (MAE). The results obtained for extraction efficiency under optimal conditions are comparable for the two extraction methods (89.2 ± 0.50% for MAE and 87.4 ± 0.44% for UAE). The operation conditions for maximum extraction efficiency were: 13.77 W/cm2 UI, 40 °C temperature, and 10 min extraction time for UAE and 225 W microwave power, 15 ml/ g solid/liquid ratio, and 20 min extraction time for MAE. The extraction kinetics was characterized using a second order model for optimal conditions for UAE and MAE of SB seed oil. Practical applications This article describes two modern methods of sea buckthorn seed oil extraction: ultrasound assisted extraction (UAE) and microwave assisted extraction. Both methods offer many advantages if they are likened with conventional oil extraction. The results illustrated that both methods give comparable values for extraction efficiency, but with an advantage for UAE. The extraction time for UAE is shorter in comparison with MAE (10 min in comparison with 20 min).

Optimization Methods for the Extraction of Vegetable Oils: A Review

“…Moreover, the researchers reported gains in extraction time because optimum yield was achieved at 60 min for UAE while the same yield was obtained at 90 min for solvent extraction. Isopencu et al [59] optimized ultrasonic intensity (UI), temperature, and time in the extraction of sea buckthorn oil. For optimized extraction, operation conditions were 13.77 W/cm 2 UI, 40 • C, and 10 min extraction time for UAE.…”

“…Ionic conduction caused by the electrophoretic migration and the dipole rotation of realignment of ions under an applied electromagnetic field results in an increase in temperature of the extraction medium [28,66]. MAE is greatly influenced by the solubility of the compounds of interest in the solvent, partition coefficient, mass diffusivity, and the dielectric properties of the feedstock and the solvent [59]. Mgudu et al [66] investigated the effect of the microwave treatment on the yield and quality of the oil obtained from castor beans and showed that the microwave treatment gave optimum yields of 44.34% at a power of 280 W after 120 s. Mosquera et al [67] also reported that a better quality palm oil with a lower unsaturated fatty acid content even though a lower yield was obtained from the MAE process compared to expeller press and solid-liquid extraction.…”

Bioactive compounds and ethnomedicinal uses of Syzygium cumini (L.) Skeels-A comprehensive review

“…The most common method to obtain extracts from plants is solvent extraction. However, in recent years different extraction techniques were applied for the phytochemical extraction, such as ultrasound-assisted extraction (UAE), microwave-assisted extraction (MAE), either separate or simultaneous (Asofiei et al, 2016;Chemat et al, 2012;Isopencu et al, 2019;Li et al, 2018). It was demonstrated that the ultrasound-assisted extraction with frequencies higher than 20 kHz has an essential role in the facilitation of the extraction of the organic compounds using different solvents (Roidaki et al, 2015).…”

Influence of nitrogen protection on the extraction yield and antioxidant activities of polyphenols by ultrasonic‐assisted extraction from rapeseed meal

“…However, it should be pointed out that this extraction approach consumes large quantities of solvents and extraction time (Ruesgas‐Ramon, Figueroa‐Espinoza, & Durand, ). In the face of the drawbacks of CSE, the researchers have developed a new technique called the ultrasonic‐assisted extraction (UAE) (Isopencu et al, ; Naffati, Vladic, Pavlic, & Vidovic, ). It can be shown that this method can not only reduce the solvent consumption, but also greatly improve the extraction efficiency (Giuseppe et al, ; Liliana, Adina, Irina, & Valentin, ; Ma, Chen, Liu, & Ye, ; Naffati et al, ).…”