Browsing by Author "Derbala, Asaad"

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DEVELOPING THE TRANSMISSION SYSTEM OF THE COMBINE CUTTING DEVICE FOR HARVESTING RICE CROP
(UNIV AGRICULTURAL SCIENCES & VETERINARY MEDICINE BUCHAREST, 2010) Kassem, Hossam; Derbala, Asaad; Fouda, Tarek; Helmy, Mamdouh
The transmission system of the combine cutting device was developed and manufactured from local material to be suitable for the harvesting operation under Egyptian conditions. Performance evaluation of the combine before and after development during the harvesting operation of rice crop was carried out in terms of grain losses, field capacity, field efficiency, fuel consumption, required power, energy, wearing rate, wearing resistance and cost requirements. The combine performance was studied as a function of change in combine forward speed and grain moisture content and operating time. The results were obtained to gave maximum field capacity, field efficiency, wearing resistance and minimum energy, power, fuel consumption wearing rate, and cost requirements for the two systems of the combine cutting device before and after development as following: It is recommended to used the developed combine, at a forward speed of 3.5 km/h and a grain moisture content of 23%.
DEVELOPMENT AND EVALUATION OF A LOCAL OIL SEEDEXPLIER TO IMPROVE THE EXTRACTION EFFICIENCY
(UNIV AGRICULTURAL SCIENCES & VETERINARY MEDICINE BUCHAREST, 2011) Yassa, Nervein; Kaddour, Osama; Derbala, Asaad; Helmy, Mamdouh; Fouda, Tarek
In small-scale industries for dyeing and in medicines as anti-inflammatory substance. Seeds have been used as insecticide and oil extraction for fuel, soap and varnish production. Seed cake has been used as fertilizer, as solid fuel, or in biogas production. Non toxic varieties detoxified seed cake has been used as feed for animal. An local oil extraction machine used to extract different varieties of oil seeds developed and evaluated to increase the extraction efficiency and find the solution for the most problem of all oil press extraction machines that the high percentage of oil in cotton seed cake by use the press screw pitch of double flight, number of blades of 18 blades, development the machine head to control the clearance between machine head and press screw of 1, 1.5, 2 and 2.5mm, and studying the effect of press screw speed of 30, 60, 90 and 120 rpm on machine efficiency and final product quality. The optimum parameters and condition of machine were 32.43kg/h machine productivity, 88.10 kW h/ton energy requirement, 63.905 extraction efficiency, 11.08% oil extracted percentage, 6.51% oil percentage in cake, by using double flight press screw, clearance of 1.5mm, screw speed of 90 rpm and 18blades number. the obtained results were very important for oil extraction industries that use the oil press method for oil extraction.
EFFECT OF SOME OPERATIONAL FACTORS ON THE COSTS OF SEED COATING
(UNIV AGRICULTURAL SCIENCES & VETERINARY MEDICINE BUCHAREST, 59 MARASTI BOULEVARD, 2011) Amer, Mayei; Badr, Samy; Derbala, Asaad; Helmy, Mamdouh
The present research was carried out at the Station of Seed Processing in Gemmiza Agricultural Research [middle of the Nile Delta-Egypt] to costs evaluate under some operational factors involved in processes of corn and wheat seed coating. The results revealed that, increasing the angle of coating pan and speed pan rotation leads to less needed time for coating 1 ton of corn and wheat seeds and vice versa. Then, the operating costs were reduced from 15.94 L.E.Mg-1 to 10.53 L.E.Mg-1 under theta(1) and theta(4), respectively [one U.S. Dollar 5.5 Egyptian pound, L.E in 2011]. On the other hand, it reduced from 15.61 L.E.Mg-1 to 11.31 L.E.Mg-1 under V-1 andV(4), respectively for corn. But in case of wheat, the operating costs were reduced from 17.36 L.E.Mg-1 to 12.68 L.E.Mg-1 under V-1 and V-4, respectively. And it reduced from 16.92 L.E.Mg-1 to 12.21 L.E.Mg-1 under V-1 and V-4, respectively. The effect of changing speed of spinning disc has not meaningful variation on the time needed for coating 1 megagram (Mg) of corn and wheat seeds.