Maximize the Utilization of some Residuals Food Manufacture

Abstract

The current study was carried out to test and evaluate the possibility of maximizing the utilization of some residuals food manufacture (orange peel). A cutting and pressing machine was designed and fabricating for conducting the experimental work. The developed machine was tested and evaluated under the following parameters; three speeds of cutting for serrated knives of 1000, 1200and 1400 rpm (9.42, 11.304 and 13.188 m/s) and three knives number of 6, 8 and 10, at constant screw speed of 60 rpm. The measurements taken into consideration to investigate the performance of the developed machine included productivity (kg/h), percentages of cutting length (%), energy requirements (kW.h/Mg) , operating cost (EGP/Mg), and percentage contents of oil and pectin. The obtained results indicated that the highest value of machine productivity for orange peel residues was 120.98 kg/h. The value of energy requirements and operating cost were 73.50 kW.h/Mg and 233.75 EGP/Mg respectively. The highest percentage of oil were 4.38 % and 4.24% ml /100g gross weight and pectin were 40.89 and 36.19% g/100g which obtained at cutting length for orange peel residuals < 0.5 and 0.5 -1cm. These results were obtained under the operating conditions of; knives speed was 1400 rpm (13.188 m/s) and 10 cutting knives at constant screw speed of 60 rpm.