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| Influence of decortication and pressing oil conditions on the process effect of Cyperus esculentus |
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| DOI： |
| KeyWord:Cyperus esculentus dry decortication oil extraction by pressing decortication rate kernel yield wetting and cooking residual oil rate of press-cake |
| FundProject:“十三五”国家重点研发计划项目（SQ2019YFD 100114） |
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| Abstract: |
| Cyperus esculentus is difficult to be decorticated due to its wrinkled grooves and irregular shape, and it is also hard to extract oil because of its high starch and low protein content. These problems restrict the development of oil production and edible industry of Cyperus esculentus. In order to solve these problems, the influences of decortication and pressing oil conditions on the process effect were studied. The results showed that the high peeling rate and kernel yield of 52.43% and 78.22% respectively could be achieved at 12% moisture content and 9 min decorticaion time; the residual oil rate of the second press-cake was 3.72% when the Cyperus esculentus with 8% moisture content was crushed to 0.83 mm (20 mesh) and pressed at room temperature using the hydraulic press. When the crushed Cyperus esculentus was wet steamed at 70-80 ℃ for 30 min and pressed, the residual oil rate of press-cake was slightly higher than that of unpretreated. Cyperus esculentus is not suitable for high temperature wetting and cooking treatment prior to pressing. |
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