A Mechanical Mungbean Sheller for Small Scale Applications PDF

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January to June 2010 39 A MECHANICAL MUNGBEAN SHELLER FOR SMALL SCALE APPLICATIONS Ralph Kristoffer B. Gallegos1, Arsenio N. Resurreccion2, Omar F. Zubia3 Fernando O. Paras, Jr3, Arthur L. Fajardo3 and Rossana Marie C. Amongo3 ABSTRACT A mechanical mungbean sheller prototype was fabricated to addres...

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January to June 2010

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ABSTRACT A mechanical mungbean sheller prototype was fabricated to address the need of small scale mungbean producing areas of a low capacity mungbean sheller. The prototype was composed of a cylinder-concave assembly as the shelling unit and a blower-screen assembly as the cleaning unit. The sheller is made of locally available materials and powered by a 1-hp electric motor. It requires one operator whose primary task is to load the mungbean pods into the hopper. The sheller’s operating and performance characteristics were established using mungbean pods at MC1 = 10.7 %wb, MC2 = 12.8 %wb and MC3 = 18.9 %wb moisture levels. The highest shelling efficiency (98.6%) and shelling recovery (96.4%) were obtained at the MC1 pod moisture level while the lowest efficiency (96.6%) and recovery (93.0%) were observed at the MC2 moisture level. The shelling capacity ranged from 19.5 kg/hr (MC3) to 36 kg/hr (MC1), depending on the moisture content of the input pods. MC1 and MC2 pod moisture levels exhibited the highest output purity of 97.3% while a lower purity of 94.8% was observed using MC3 pods. Mechanically damaged kernels were estimated at a lowest of 5.9% at the MC1 level while the highest value of 11.3% was noted in MC3 level. Based on the results of the various tests, it is recommended that further studies should be performed to determine the optimum performance characteristics of the sheller. Keywords: mungbean, mungbean sheller, test and evaluation of mungbean sheller, mungbean sheller design

mungbean is popular to farmers because it does not require too much attention during its growing ungbean or ‘mongo’ is a stage. It is generally grown in dry leguminous crop grown months of the year because of its primarily for its seeds. relatively low soil moisture Although sometimes unnoticed, requirement. However, the mechathere is a high demand of mungnization of mungbean production bean in the local markets. This is triggered by the popularity of Aside from occasional irrigation is one of the main challenges of fertilizer application, the industry. The seeds are usually mungbean as a cheap source of and

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protein. Unfortunately, mungbean production is seasonal and inadequate. Like in the case of peanut and soybean, local mungbean production is still augmented by imports to meet its domestic and industrial demands.

Instructor, 2 Professor, 3 Assistant Professor, Agricultural Machinery Division (AMD), Institute of Agricultural Engineering (IAE), College of Engineering and Agro-Industrial Technology (CEAT), University of the Philippines Los Baños, 4031 College, Laguna, Philippines....