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


Article Title: Performance Evaluation of a Single Action Cassava Peeling Machine
by O.J Olukunle and B.O. Akinnuli

Cassava (Manihot utilissima Pail) is second only to sweet potato as the most important starchy root crop of the tropics among crops grown throughout the tropical world. In most of the tropical world, Cassava is grown on small plot; however, in some countries e.g. Mexico, Brazil and Nigeria, large plantations have been started and interest in mechanization is growing. The degree of mechanization depends on the size of the land and availability of machine for each unit operations involved in cassava processing. However, of all the unit operations involve in cassava processing, several process have been mechanized successfully, cassava peeling remains a serious global challenge to processing Engineers. The purpose of this research is to evaluate effectiveness of a designed and fabricated single action cassava peeling machine on cassava root crop considering difficulties posed by the crop's irregular shape, for this reason, a cassava peeling machine with single action was fabricated in the Department of Agricultural Engineering, Federal University of Technology, Akure, Nigeria. The capacity of the machine is 1050 kg/h. This machine was evaluated using newly harvested improved variety of cassava tuber (TMS30572) grouped into different sizes : 100 <_ L < 140, 140 <_ L < 180, 180 <_ L < 220, 220 <_ L < 260, and 260 <_ L < 300. Machine operational parameters such as machine speed, throughput capacity, peeling efficiency, mechanical damage, quality performance efficiency and peel retention were determined for each group size. Results revealed that at high throughput capacity 442 kg/h, peeling efficiency and quality performance efficiency 75 % and 40 % respectively were achieved at high machine speed 6oorpm for big sizes of cassava range 260 <_ L < 300 but with high mechanical damage 44 % and high peel retention 33 %. Moreover, at low throughput capacity 76 kg/h, peeling efficiency and quality performance efficiency 60 % and 50 % respectively were achieved at low machine speed 100rpm for small sizes of cassava range 100 ? L<140 and with low mechanical damage of 12 % and low peel retention of 7.2 %. These results shows appreciable improvement over manual method and existing machines. This is a rational by which a single action cassava peeling machine method should be adopted due to the machine's advantages over manual method of peeling that is generally practiced in all cassava processing industries. The production cost implication of this machine considering bought out components, material cost, machining job cost, and non-machining job (welding, cutting and others) is approximately two hundred and sixty one ($261:00) dollars. Using current conversion rate of One Hundred and Fifty Six Naira per Dollar in Nigeria.
Keywords: performance evaluation, cassava, peeling machine, design, fabrication.
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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



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