الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The aim of this study was divided into two parts: First part was to evaluate the effectiveness of high temperature short t ime conduction heating technique for drying high moisture olive pomace. The drying experiments were performed at different levels of cylinder surface temperatures (80, 95, 110, 125 and 140 °C) and pomace mass of (1, 1.5 and 2 kg per patch). A constant rate period was not observed in the drying of olive pomace; all the drying process occurred in the falling rate period. Five thin layer drying models were evaluated for fit ting the experimental moisture data. The fit quality of the examined modelswas evaluated using the determination coefficient, chi-square, and root mean square error. Among the selected models, page model was found to be the most suitable model for describing the drying behavior of olive pomace. In addition, the effects of studied parameters on the drying characteristics, the final quality of the dried pomace was also determined. Second part was to investigate the effect of operating parameters of an oil screw expelling machine on pomace oil yield, cake output, extraction rate, extraction loss, throughput capacity and extraction efficiency in order to determine the optimum operating condition of the machine for maximum yield using factorial experimental design. Both the screw speeds (20, 30, 40 and 50 rpm) and nozzle diameters (8, 10 and 12 mm), produced significant differences in pomace oil yield. The nozzle diameter and screw speed showed negative relationship with the oil yield and the extraction efficiency. However, a positive relationship was detected with the throughput capacity. Analysis of results showed that, the highest pomace oil yield was obtained at screw speed of 20 rpm and nozzle diameter of 8 mm with operational cost of 27.57 LE/h. No effect of the operating parameters on oil quality. The result of this study revealed the possibility
of extracting oil from the dried pomace by using the screw-type oil expeller.