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Oloron-Sainte-Marie, France

Sicaire A.-G.,University of Avignon | Vian M.A.,University of Avignon | Fine F.,Technical Institute for Oilseed Crops | Carre P.,CREOL | And 2 more authors.
Ultrasonics Sonochemistry | Year: 2016

Ultrasound-assisted extraction of rapeseed oil was investigated and compared with conventional extraction for energy efficiency, throughput time, extraction yield, cleanness, processing cost and product quality. A multivariate study enabled us to define optimal parameters (7.7 W/cm2 for ultrasonic power intensity, 40 °C for processing temperature, and a solid/liquid ratio of 1/15) for ultrasound-assisted extraction of oil from oilseeds to maximize lipid yield while reducing solvent consumption and extraction time using response surface methodology (RSM) with a three-variable central composite design (CCD). A significant difference in oil quality was noted under the conditions of the initial ultrasound extraction, which was later avoided using ultrasound in the absence of oxygen. Three concepts of multistage cross-current extraction were investigated and compared: conventional multistage maceration, ultrasound-assisted maceration and a combination, to assess the positive impact of using ultrasound on the seed oil extraction process. The study concludes that ultrasound-assisted extraction of oil is likely to reduce both economic and ecological impacts of the process in the fat and oil industry. © 2016 Elsevier B.V. All rights reserved.

Sicaire A.-G.,University of Avignon | Abert Vian M.,University of Avignon | Fine F.,Technical Institute for Oil Seeds | Carre P.,CREOL | And 2 more authors.
OCL - Oilseeds and fats, Crops and Lipids | Year: 2015

Vegetable oils take a large part in industry for food and non-food applications. However the extraction process of oil from oilseeds includes a solvent extraction step using hexane. Despite its various advantages it presents numerous drawbacks; it is sourced from petroleum, it has a high flammability and it appears to be dangerous for health and environment (CMR2). This study presents a theoretical screening using COSMO-RS simulations of the relative solubility of vegetable oil constituents regarding several bio-based solvents as well as an experimental screening of the efficiency of these solvents. The aim is to correlate simulations and experiments and give a preliminary evaluation for the substitution of hexane by bio-based solvents for the extraction of vegetable oils. Differences between theory and practice have been noticed for several solvents such as terpenes that appeared to be good candidates in theory and that were in fact the solvents that gave the lowest extraction yield. © A.-G. Sicaire et al., Published by EDP Sciences 2015.

Quinsac A.,Cetiom | Bazin De Caix C.-P.,AFNOR | Bernard C.,UNION in VIVO | Brosson B.,SAIPOL | And 15 more authors.
OCL - Oilseeds and fats, crops and lipids | Year: 2013

The data collected in France through a long-term survey on the quality of oilseed meals indicated that the use of unsuitable analytical methods may underestimate the residual oil content of rapeseed and sunflower meal. This misevaluation could make more difficult the optimizations of the oil extraction process and the formulation of feedstuffs. In order to evaluate the performance of current methods, a study was conducted in collaboration with most of the laboratories involved in the analysis of oilseed meal and feed within AFNOR V18A, the French committee for the standardization for feedstuffs. Eight samples were analysed. Five had a low oil content: rapeseed meals (3) from different oil mills, sunflower meal (1), soybean meal (1). Three had a high oil content: extruded full-fat soybeans (1), rapeseed cake (cold-pressed) (1) and linseed cake (cold-pressed) (1). The methods tested were based on three principles: (A) solvent extraction without hydrolysis (B) hydrolysis and solvent extraction (C) without hydrolysis and solvent extraction with a ball mill. The results showed that repeatability and reproducibility data were in agreement with those determined in previous ring-tests and mentioned in standards: NF V18-117 Part 1 for method A, NF V18-117 Part 2 for method B and ISO 734-2 method for C. Some differences for the determination of the oil content were observed between the three methods, particularly for samples that were heated during their production process. Methods A, C and B in that order gave increasing contents of residual oil in deoiled oilseed meals. The difference between results from methods A and B corresponding to the bound fat ranged from 0.7 (soybean meal) to 1.4 g/100 g (rapeseed meal) and represented around one half of the fat content determined by the method A. Recovery of the non linked residual oil was higher with method C than with method A by around 0.6 g/100 g in rapeseed meal, showing the ability of method C to extract the entrapped oil. This study showed that the three methods gave, as expected, different results depending on the principle of method and the process used for the meal or cake production. Finally, the choice of the most relevant method for fat determination should depend on how the results are used, for feed formulation or for the optimization of the extraction process. © 2013 A. Quinsac et al., published by EDP Sciences.

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