DESIGN AND FABRICATION OF MAIZE CORN-ON-COB TRAY DRYER

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Keywords: DESIGN AND FABRICATION OF MAIZE CORN-ON-COB TRAY DRYER

ABSTRACT
This study was carried out to generate a design data, design and fabricate a maize corn-on-cob tray dryer used by maize farmers. Ripped maize corns with husks were bought from the market and preserved to retained its moisture content, dehusked and thereafter, dried to a given percentage moisture content of 15%. This was done by laboratory dryer. The drying rate data was generated and the high rate of 2.0g/hr was used afterwards to design and fabricate the corn-on-cob dryer. From the results, drying of a sample of maize corn-on-cob by the laboratory dryer took a period of three days and six hours to reach the 15% moisture content (wet basis) needed. A test run was carried out on the fabricated dryer and seventeen hours was used to dry a sample of maize corn-on-cob to the same 15% moisture content. This implies that design data is satisfactory as its application in the fabrication of the dryer resulted in an increased flow rate of air in the dryer thereby increasing the rate of drying at the same drying temperature of 40oC.

INTRODUCTION
1.1. BACKGROUND OF STUDY
Cereal grains have been and will continue to be a major source of food for humans and animals throughout the world. Amongst all cereals, the most important is the maize grain. (Leonard et al, 1963). Maize corn and products can be used for various purposes; human food, alternative medicine, chemicals, bio fuels, ornamentals, fodder, to mention but a few (Leonard, Warren H., and John H. Martin). Maize crop is intensively and extensively cultivated in all the geo-political zones of Nigeria. Early maize is planted between late March and late May while the late maize is planted between August and September. The harvest time for the early maize is usually between late July and September. During this period, corns are harvested fresh and cannot be preserved by drying owing to the unavailability of sunshine during the rainy season. It is usually roasted or cooked fresh. This practice does not encourage maize farmers as they would sell the maize corn at a give-away prices and this does not guarantee returns on their investment. In addition to this, dried maize grains will guarantee food sufficiency during the scarce period. Notably, corn of high moisture content does not stored very well and is usually vulnerable to damage due to deterioration, molds, and insects during the period of storage.

Keywords: DESIGN AND FABRICATION OF MAIZE CORN-ON-COB TRAY DRYER

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Keywords: DESIGN AND FABRICATION OF MAIZE CORN-ON-COB TRAY DRYER

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