Journal
FOOD CHEMISTRY
Volume 194, Issue -, Pages 354-361Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.07.151
Keywords
Tiger nut oil; Pressing; Particle size; Enzymes; Polyphenol
Funding
- Petroleum Technology Development Fund (PTDF)
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Tiger nut (Cyperus esculentus) tuber contains oil that is high in monounsaturated fatty acids, and this oil makes up about 23% of the tuber. The study aimed at evaluating the impact of several factors and enzymatic pre-treatment on the recovery of pressed tiger nut oil. Smaller particles were more favourable for pressing. High pressure pre-treatment did not increase oil recovery but enzymatic treatment did. The highest yield obtained by enzymatic treatment prior to mechanical extraction was 33% on a dry defatted basis, which represents a recovery of 90% of the oil. Tiger nut oil consists mainly of oleic acid; its acid and peroxide values reflect the high stability of the oil. (C) 2015 Elsevier Ltd. All rights reserved.
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