Modification of an existing Mung bean Sheller
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Date
2024
Authors
Xaiarlle A. Ventura
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Abstract
The main goal of the study was to modify and evaluate an existing mung bean sheller for adaptation in the local adaptation in the local production and postharvest processing of mung bean in the Science City of Muñoz, Nueva Ecija. The mung bean sheller was considered with the primary goals of assisting the mung bean farmers in saving time and energy during the shelling process, decreasing the labor-intensive tasks during postharvest, minimizing the health hazard due to pods and dust that may bring allergy, and skin irritation, and minimizing postharvest losses. It has the potential to address the pressing labor shortage issue.
The shelling assembly, separation assembly, cleaning assembly and the power transmission assembly comprised the machine’s key components. The feeding hopper is where the mung bean pods are fed. After entering through the hopper, the mung bean pods enter the shelling assembly made of a shelling drum with pegs counter to crush the mung bean pods. Following the shelling process, using an oscillating tray, the mixture of pod, beans and filth are separated. The cleaning assembly of the machine has a radial blower that effects the separation and removal of unwanted materials. The power transmission until was composed of a 6.5 hp gasoline engine as prime mover and combination of belt and pulley.
The mung bean sheller was subjected to different shelling drum speed of 350 rpm, 400 rpm, and 450 rpm respectively. This was achieved using pulley diameters of 5 inches, 6 inches and 8 inches, respectively. The analysis of the collected data shows that the highest shelling capacity of 127.78 kg/hr from the use of 450 rpm rotation of the shelling drum resulted to the highest shelling efficiency of 92.93% and highest selling recovery of 92.57%. The same speed resulted to the comparably lower unshelled loss of 7% lowest percentage of mechanically damaged bean of 1.63% while maintaining a high purity of 95.44%. Through the use of 350 rpm to almost comparable performance, the capacity was significantly lower at 110.03 kg/hr only.