Search results for "Olive oil extraction"

showing 3 items of 3 documents

Gas assisted mechanical expression (GAME) for the selective recovery of lipophilic and hydrophilic compounds from olive kernel

2017

Abstract This work is devoted to valorize olive kernel; a by-product produced during olive oil extraction process. For this purpose, aqueous liquid solid extraction (LSE), mechanical expression (ME), supercritical CO2 (SC-CO2) and gas assisted mechanical expression (GAME), processes were compared when applied separately or consequently (ME + GAME), in terms of total phenolic compound (TPC) and oil recovery yields. Results showed that although the high extraction yields of TPC using LSE (61.4 ± 1.3%), the extraction process is economically not viable. However, it was demonstrated that applying ME (1 h at 30 MPa) followed by GAME (1 h at 30 MPa ME and 10 MPa SC-CO2 pressures) allowed recoveri…

Aqueous solutionChromatographyRenewable Energy Sustainability and the EnvironmentChemistryStrategy and Management010401 analytical chemistryExtraction (chemistry)04 agricultural and veterinary sciencesMass spectrometry040401 food science01 natural sciencesIndustrial and Manufacturing EngineeringSupercritical fluid0104 chemical sciences0404 agricultural biotechnologyYield (chemistry)Olive oil extractionDegradation (geology)Gas chromatographyGeneral Environmental ScienceJournal of Cleaner Production
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Determination of Olive Oil Parameters by Near Infrared Spectrometry

2010

Publisher Summary Near infrared (NIR) covers the region between 780 and 2500 nm, and based on the absorption, transmission or reflection of the light, NIR spectroscopy provides a fast and non-destructive technique which is very useful for the simultaneous determination of several compounds in the same sample. Food NIR spectra comprise broad bands corresponding to overtones and combinations of vibrational modes involving C–H, O–H, and N–H chemical bonds, providing a great amount of information which properly treated by chemometrics is useful for classification and for the quantification of many parameters. The olive oil extraction process starts in the harvesting and transport of olive fruit…

ChemometricsMaterials scienceMoistureNear-infrared spectroscopyPomaceAnalytical chemistryOlive oil extractionAbsorption (electromagnetic radiation)MalaxationOlive oil
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Phenolic profiles of olive mill wastewaters treated by membrane filtration systems

2014

BACKGROUND Olive mill wastewater is an important by-product obtained after olive oil extraction. In this investigation, the phenolic composition of olive mill wastewater treated with a semi-industrial membrane filtration system, including ultrafiltration and reverse osmosis modules, was studied. In particular, untreated olive mill wastewater was compared with the permeate and the concentrate fractions of each filtration step. RESULTS 3,4-(dihydroxyphenyl) ethanol and p-(hydroxyphenyl) ethanol were the main compounds of all olive mill wastewater analyzed. A total of 32 compounds, detected at 240 or 280 nm by HPLC-DAD, were considered for phenol quantification. Ultrafiltration reduced phenol …

Olive mill wastewaterChromatographyEthanolPhenolic compoundRenewable Energy Sustainability and the EnvironmentGeneral Chemical EngineeringOrganic ChemistryUltrafiltrationPermeationPollutionReverse osmosiInorganic Chemistrychemistry.chemical_compoundMembraneFuel TechnologychemistryWastewaterOlive oil extractionPhenolChemical Engineering (all)PhenolsReverse osmosisWaste Management and DisposalBiotechnology
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