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Ověření účinnosti šnekového lisu při lisování oleje ze semen révy vinné
Gottwaldová, Nicole
This diploma thesis was processed in the years 2018-2019 at the Institute of Horticultural Engineering of the Faculty of Horticulture of the Mendel University in Brno. The aim of this study was to verify and determine the yield of grapevine seed oil during pressing on a screw press with an emphasis on its working setting, especially on the revolutions per minute during pressing. Various possibilities of using marc and the seeds themselves were analyzed. However, we have focused on different ways of separation, seed drying technology and especially pressing methods. In the practical part were compared the results of the thousand grain weight, density of seeds, press performance and values of oil yield, as well as the content and density of oil in six selected varieties of Vitis vinifera L. Furthermore, a chapter dealing with the cost of operation was elaborated.
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Ověření účinnosti šnekového lisu při lisování olej ze semen ovocných druhů
Gertner, Marek
The aim of this thesis was to conduct an experiment in which the efficiency and performance of a screw press were monitored during various modes of operation. The theoretical part of the thesis was focused on a more detailed specification of selected types of nuts. This part also contains a description of individual types of nut trees and their fruits in terms of their practical usage and substances contained. Another objective was to examine the significance and application of nut oils in individual domains of human activity, such as industry, gastronomy, pharmacy, cosmetics, and others. Last but not least, the technical capacities for ensuring mechanical pressing with screw press were introduced and described. The practical part was focused on the process of mechanical pressing using a Farmet UNO screw press. In the first part of the experiment, differences in performance and extraction yield were observed depending on the type of nut being pressed, but also on substances contained in extracted oils. The second part of the experiment focused on pressing of a single type of material, namely peanuts. The performance and extraction yield of the press was observed during three chosen modes of operation. Finally, data regarding performance and extraction yield of Farmet UNO press was processed and evaluated. This was done from the perspective of differences between pressed materials and differences between individual modes of operation. Results of laboratory analyses of substances contained in extracted oils were also processed and compared. This diploma thesis produced rather demonstrable results that can be taken into consideration during practical application.
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