RAPESEED MEAL

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Rapeseeds contain 40-45% oil and yield about 55-60% oil meal when fully extracted by crushing followed by solvent extraction (see figure above). The main steps of this process are seed cleaning, seed pre-conditioning, rolling and flaking, seed cooking and pressing to mechanically remove a portion of the oil, solvent extraction (hexane) of the press-cake to remove the remainder of the oil, desolventizing and toasting (Newkirk, 2009). Temperature is one of the main factors affecting the quality of rapeseed meal (see Nutritional attributes on the "Nutritional aspects" tab). Solvent-extracted rapeseed meal should not contain more than 2-3% oil