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Please use this identifier to cite or link to this item: http://bsuir.bsum.edu.ng:8080/jspui/handle/11409/673

Title: DESIGN, CONSTRUCTION AND PERFORMANCE EVALUATION OF A MODIFIED BAMBARA NUT CRACKER
Authors: KOGH, DONATUS ASUA
Keywords: DESIGN, CONSTRUCTION, PERFORMANCE
EVALUATION
Issue Date: Aug-2019
Publisher: NONE
Citation: NONE
Abstract: The reduction or elimination of post-harvest losses in shelling of Bambara pods to obtain good quality seed is one of the most tedious operations in Bambara nut processing. As a result, it has constituted a bottle- neck to the large scale production. This study therefore was conducted to design, construct and evaluate modified Bambara nut cracker. Experimental design was used in the conduct of the study which followed a three-treatment effect (speed level, moisture content and sorting efficiency) in a Randomized Complete Block Design (RCBD) involving three observations per experimental unit. The performance test was done using experimental design for the statistical analyses after the machine was fabricated and all data recorded were subjected to analysis using Statistical Package for Social Sciences (SPSS) with the use of Analysis of Variance to determine the extent to which speed level, moisture content and sorting efficiency affects the machine performance indicators at 95% confidence level. Results on speed shows a significant effect (p<.05) with multiple comparison showing that 275 RPM (Mean = 2.46; SD = 3.14) is the best speed that gives ultimate performance for the machine. On moisture content, results also indicated a significant effect (p<.05) indicating that 7% moisture content (Mean = 2.85; SD = 3.81) is the best moisture content that produces the desired result. On the basis of shelling efficiency, the result also indicated a significant effect (p<.001) showing from the result that the machine has a very high shelling efficiency particularly in terms of completely shelled which carried the highest mean score of 6.33 (SD = 1.61). In respect to the multiple comparison to determine the best speed as well as moisture content with the highest shelling efficiency, the result shows that the best speed was 275 RPM with the 7% moisture content that has the highest level of shelling efficiency with the mean of 8.40 (SD = 6.85). The machine also showed a very high sorting efficiency (p<.001) with small pods having an average of 3.57 (SD = .220), medium pods having average sorting efficiency of 3.11 (SD = .225) while large pods having an average sorting efficiency of 2.57 (SD = .437). In conclusion, the machine has sorting efficiency percentage of 93.6%, shelling efficiency of 97.8%, cleaning efficiency of 98.01%, percentage broken was 1.60%, percentage partially shelled 2.80% and the percentage unshelled pods was .9%. Also, the overall performance of the machine when calculated was 99%. It was therefore recommended among others that Benue State Government should be encourage to produce Bambara nut shelling machines to curb postharvest losses of the said product. This can bust the production of Bambara nut in the state.
URI: http://bsuir.bsum.edu.ng:8080/jspui/handle/11409/673
Appears in Collections:Centre for Food Technology & Research (CEFTER)

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