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| A new continuous production process of fragrant sesame seed oil by aqueous extraction method |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.230540 |
| KeyWord:fragrant sesame seed oil aqueous extraction method continuous process horizontal screw centrifugation |
| FundProject:河南省中央引导地方科技发展资金（Z20221343042）；国家特色油料产业技术体系食品加工岗位科学家（CARS-14-1-30）；河南省农业科学院科技创新团队项目（2023TD23） |
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| Abstract: |
| In order to improve the production efficiency of fragrant sesame seed oil by aqueous extraction method, instead of shaking oil and pounding oil process in oil extraction by the traditional aqueous extraction method, horizontal screw centrifugation was used to explore a new continuous process for fragrant sesame seed oil by aqueous extraction method. On the basis of examining the feasibility of centrifugation and determining the basic conditions for simulation continuous centrifugation, the parameters of grinding and water adding and mixing process were optimized, and the optimized process was verified by three-phase horizontal screw centrifuge in the actual production. The results showed that the viscosity of the whole system during the process of water adding and mixing was lower than 25 000 Pa·s, which was in line with the requirements of horizontal screw centrifuge on the fluidity of materials. The optimal conditions for new continuous process of fragrant sesame seed oil by aqueous extraction method were wheel mill + colloid mill grinding each once, 85% of water amount, high-speed (300 r/min) vigorous mixing 40 min, slow-speed (60 r/min) gentle mixing 10 min, centrifugal speed 6 000 r/min, centrifugal time 1 min. Under the optimal process conditions, the oil extraction rate was (89.28±0.45)%, and the residual oil rate of sesame residue was (11.92±0.25)%. The actual production results showed that the oil extraction rate of the new continuous process of aqueous extraction method was (84.74±0.62)%, the residual oil rate, crude protein content and water content of sesame residue were (15.61±0.28)%, (43.30±0.54)% and (59.40±0.26)%,respectively, and the fragrant sesame seed oil produced was in compliance with GB/T 8233-2018 except for the content of insoluble impurities and water and volatiles content. In conclusion, the new process can realize the continuous production of fragrant sesame seed oil, save time, and the oil extraction effect and fragrant sesame seed oil quality indexes are close to those of the traditional aqueous extraction method, which indicates that it is feasible to replace the traditional aqueous extraction process by the new process with horizontal screw centrifugation as key. Subsequently, it is necessary to carry out research on equipment upgrading and process optimization in the pilot test and on a larger scale in the future, so as to improve the effect of the new continuous process of fragrant sesame oil by aqueous extraction method. |
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