DESIGN, CONSTRUCTION AND PRELIMINARY TESTING OF A BENISEED ( Sesamum indicum ) AIR-SCREEN CLEANER

AKINOSO, R. and Olayanju, T.M.A. and HASSAN, L.O. and AJIBOSHIN, I.O. (2010) DESIGN, CONSTRUCTION AND PRELIMINARY TESTING OF A BENISEED ( Sesamum indicum ) AIR-SCREEN CLEANER. Journal of Natural Sciences, Engineering and Technology, 9 (2). pp. 141-148. ISSN 2277 - 0593

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Abstract

A beniseed (Sesamum indicum) cleaner was designed and constructed based on the application of some determined physical and aerodynamic properties of the seed. The cleaner was an air-screen type with capacity of 200 kg/h. It consists of a set of vibratory screen made of steel mesh of different sizes. Top screen (2.0mm diameter) prevent foreign material bigger than beniseed while bottom screen (1.2mm diameter) retain beniseed and allow passage of material smaller than beniseed. A centrifugal fan with air speed of 2.5 m/s was incorporated to remove light materials. Preliminary testing of the machine with three varieties of beniseed showed that mean efficiency of separating good product from Yandev-55, E8 and Goza-25 were 66.80 ± 0.54, 61.30 ± 0.85 and 80.08 ± 0.74 % respectively. In Addition, efficiency of separating bad products from Yandev-55, E8 and Goza-25 were 1.47 ± 0.41, 1.61 ± 0.64 and 1.23 ± 0.47 % respectively. Total efficiency of the machine as determined were 98.2 ± 0.98, 98.7 ± 1.24 and 98.5 ± 1.09 % for Yandev-55, E8 and Goza-25 varieties of beniseed respectively. At 95% confidence level, the machine efficiency is acceptable. Therefore, the machine is suitable for cleaning the three varieties of beniseed.

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