Impact of sound attenuation on ultrasound-driven yield improvements during olive oil extraction

Pulsed Electric Fields for the Treatment of Olive Pastes in the Oil Extraction Process

“…Recently, different, new technologies in the olive oil extraction process have been introduced and studied to support the malaxation step with the aim of improving the oil extraction yield and final quality, such as low-frequency ultrasound [19][20][21][22], microwave [23,24], high-frequency ultrasound [25][26][27], and PEF. Andreou et al [28] used a PEF (1.6-70.0 kJ/kg) process before malaxation (30 min at 30 • C) with an extraction yield increase up to 18%.…”

Ultrasound-assisted of alkali chloride separation using bulk ionic liquid membrane

“…The attenuation of sound in the media with lower density is the main reason for the reduced amount of separation at lower sonication times in the processes. [25] The ultrasound increases the separation rate considerably. A Comparison of separation time for lithium with a successful selective separation of lithium with ionic liquid membrane with similar system show that it is slower than this method.…”

The use of ultrasound in the South Cone region. Advances in organic and inorganic synthesis and in analytical methods

“…Amarillo et al ., from Universidad de la República, Uruguay, in collaboration with scientists from Australia and Italy, evaluated the effects on olive oil extractability due to sound attenuation and without the addition of water. This study provided a better understanding of the separation mechanisms of oil by means of ultrasound, and their future application in megasonic reactor design [134] . Researchers from Argentina proposed the extraction of canola oil from seeds employing ultrasound, microwave, and ethanol as green solvent.…”

“…Reduced to 1 mL (rotary evaporator). ----- [133] Olive oil Olive fruits UAE – 3 kg of olives for 30 min, at 0.4 MHz sonicated (USB) during 10 min [134] Canola oil Canola seeds MW and UAE ES: ethanol 99% 250 mL of ES, sonicated 3600 s (UP) amplitude 57%, 20 kHz, 500 W Shortened the extraction times Increased of ultrasound power favoring the extraction Increased in ultrasound amplitude, produced an increase in absorbed power, favoring the extraction. Increased ultrasound power, favoring the degradation of some compounds [135] Favela oil Favela seeds oil UAE ES: ethanol 5 min of extraction at 60 °C, 15 mL/g, and 20 W/cm2 Cavitation phenomenon promotes a more effective mixing of the medium and rupture of cell walls in the plant matrix.…”