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Pessac, France

Chapuis A.,Institute International Dingenierie Of Leau Et Of Lenvironnement 2Ie | Chapuis A.,French National Center for Scientific Research | Chapuis A.,CIRAD - Agricultural Research for Development | Blin J.,Institute International Dingenierie Of Leau Et Of Lenvironnement 2Ie | And 3 more authors.
Industrial Crops and Products | Year: 2014

The performance of oil expression from Jatropha curcas L. (Jatropha) seeds using a pilot scale continuous screw press was studied. The influence of seed pre-treatment, i.e. whole, crushed and deshelled seeds, screw-press operational settings (shaft rotational speed and press cake outlet section) was investigated. For each experiment, the material flows (seeds, press cake and crude oil) were measured and analysed for their oil, water and solids contents. The behaviour of oil expression was very sensitive to seeds preparation. It was shown that for whole seeds, a good reproducibility was obtained, whereas for crushed or deshelled seeds, heterogeneity of the feed led to unsteady pressing conditions and important discrepancies in the performance. The presence of seed shells contributes to build a porous solid matrix which favours oil flow through the press cake. For whole seeds, a correlation between oil recovery and seed throughput was proposed. The mass balance consistency was carefully analysed and oil yield was determined using a direct and an indirect method. A good linear correlation between seed and press cake throughputs was observed: the seed throughput is always divided in a stream of crude oil and a stream of press cake in the same proportion. This important result shows that the residual oil in press cake and the amount of solids carried by the oil are directly related and determine the efficacy of the separation. Thus, for a given screw press and feed material, the oil sediment content can be predicted knowing the oil recovery. The energy consumption during pressing was measured and modelled as a function of oil recovery and seeds oil content. The specific mechanical energy for oil expression was less than 5% of the energy content of the oil and a minimum mechanical energy requirement was generally observed at oil recoveries between 70% and 80%. © 2013 Elsevier B.V. Source

Li Y.,University of Strasbourg | Fine F.,Technical Institute for Oil Seeds | Fabiano-Tixier A.-S.,University of Strasbourg | Abert-Vian M.,University of Strasbourg | And 3 more authors.
Comptes Rendus Chimie | Year: 2014

This present study was designed to evaluate the performances of five alternative solvents (alcohols: ethanol, isopropanol and terpenes: d-limonene, α-pinene, p-cymene) compared to n-hexane in rapeseed oil extraction. The extracted oils were quantitatively and qualitatively analyzed to compare the solvents' performances in terms of kinetics, fatty acid compositions, lipid yields, and classes. Moreover, micronutrients in extracted oils were also respectively quantified by high-performance liquid chromatography (HPLC) and gas chromatography (GC). In addition, the interactions between alternative solvents and rapeseed oil have been theoretically studied with the Hansen solubility methodology to get a better comprehension of dissolving mechanisms. The results indicated that p-cymene could be the most promising solvent for n-hexane substitution with higher lipid yield and good selectivity, despite the micronutrient contents were relatively low. © 2013 Académie des sciences. Source

Kasprzak M.M.,University of Nottingham | Houdijk J.G.M.,Scotland's Rural College | Kightley S.,UK National Institute of Agricultural Botany | Olukosi O.A.,Scotland's Rural College | And 3 more authors.
Animal Feed Science and Technology | Year: 2016

We examined the effects of rapeseed variety and oil extraction method on crude protein (CP) and amino acid (AA) content in rapeseed co-products, and determined their coefficient of apparent (AID) and standardised ileal digestibility (SID) in broiler chickens. Sixteen rapeseed samples were de-oiled; four were cold-pressed producing rapeseed cake (RSC) and twelve were mild processed and hexane-extracted producing soft rapeseed meal (SRSM). One batch of the variety Compass, grown on the same farm, was processed using both methods obtaining Compass RSC and Compass SRSM. DK Cabernet rapeseed variety, grown on three different farms, was used to produce two SRSM batches and one RSC batch. All rapeseed co-products were ground through a 4 mm screen and mixed into semi-synthetic diets at a level of 500 g/kg. Day-old Ross 308 male broilers were fed a commercial diet for 14 days. A total of 96 pairs of birds were then allotted to 1 of 16 dietary treatments (n = 6) and fed a test diet for 8 days. Birds were then culled allowing removal of ileal digesta from Meckel's diverticulum to the ileal-caecal junction. Digestibility of CP and AA was determined using titanium dioxide as an inert marker. The SRSM samples had an increased content of CP (419-560 g/kg DM) compared to RSC samples (293-340 g/kg DM). Both AID and SID of lysine, and SID of arginine, histidine and threonine were greater in Compass RSC compared to its SRSM counterpart (P < 0.05). However, AID and SID of AA did not differ in both DK Cabernet SRSM, cultivated in two different farms (P > 0.05). The SID of lysine was on average 0.03 units greater (P < 0.001) in RSC than in SRSM. The SRSM produced from variety PR46W21 showed similar or greater AID and SID of individual AA than the RSC from four other rapeseed varieties. It is concluded that selection of rapeseed varieties, and extraction method have a potential to deliver high-protein dietary ingredients with a good digestibility value. © 2016 Elsevier B.V.. Source

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. Source

Fine F.,Cetiom | Vian M.A.,University of Avignon | Tixier A.-S.F.,University of Avignon | Carre P.,CREOL | And 2 more authors.
OCL - Oilseeds and fats, crops and lipids | Year: 2013

Oils represent an important part in human diet and contain essential nutriments. Consumers are more and more swayed by the argument of product origin. As for industries, they understood it's not possible anymore to produce without thinking about the environment. This article deals with the use of agro-solvents to substitute hexane which is the most widely used solvent in oilseed extraction. Indeed, hexane presents numerous drawbacks like high flammability, dangerousness for health and environment and a non-renewable origin. Its use in the field of extraction is discussed since the 80s with a renewed intensity since the 00s. An overview of alternative solvents was presented. © 2013 F. Fine et al., published by EDP Sciences. Source

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