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Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS)


Article Title: Improving Productivity in Soya-Bean Processing Through the Design and Fabrication of Double Action Decoating and Separation Machine
by C.N Agulanna, E.C Oriaku and J.C Edeh

The disadvantages arising from wet process of decoating soya-bean seeds before being processed into varied food products has necessitated the search for better alternative. Wet decoating requires soaking in water for several hours or in some cases over night before attrition is applied to shed the coats. Large amount of water is required for washing the soya-bean severally especially for industrial scale processing. When the coats are isolated, the soya-beans are then dried in ambient sunlight or a dryer before further processing as case may be. This process adversely affects the food quality of the products as some chemical processes like rancidification and fermentation may have taken place. The wet process is also uneconomical, labour intensive and time consuming. Alternative method of decoating using a cracking machine was investigated. First 5kg of soya-beans seed dried under ambient sunlight to a moisture content of about 12 - 15 % were passed through a cracking machine at several impeller speeds ranging from 800 - 2000 rpm. The speed of 1400 rpm yielded a better decoating result of 70% decoating and 10 % undecoating. The soya-bean seeds were then toasted to a temperature of 60 - 70 oC in an oven and introduced into the cracking machine. The percentage decoating rose to 95% and 5% undercoating. The data so collected was employed in the design and fabrication of the double action soya-bean decoating and separation machine in order to solve the problems arising from wet decoating and separation and also to increase productivity and reduce cost and labour to the barest minimum.
Keywords: soya-bean, decoating, toasting, cracking, separation
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ISSN: 2141-7016

Editor in Chief.

Prof. Gui Yun Tian
Professor of Sensor Technologies
School of Electrical, Electronic and Computer Engineering
University of Newcastle
United Kingdom



Copyright © Journal of Emerging Trends in Engineering and Applied Sciences 2010