Of all the food sustenance procedures practised by humanity

Of all the food sustenance procedures practised by humanity, drying is no doubt the most established technique. The development and propagation of microorganisms which cause rot and decay responses can be prevented by the evacuation/reduction of moisture during drying (Agrotehholding, 2018). The way toward drying prompts a decrease in weight and volume which implies a decrease in packing, storing and transportation costs. This likewise enables the item to be put away/stored effectively under surrounding temperatures (Dr. Alice S et al, 2015). The most critical motivation behind a drier is to give warmed air which is above the room temperature to pass through maize and doing so it reduces moisture in maize. As the warmed air goes through maize, it conveys moisture with it making its humidity increase as it goes through the grain (Agrotehholding, 2018). The most vital factors in drying are temperature, the speed of the air stream and humidity (DehydratorBlog, 2016). The utilization of sun powered dryers is best in territories where there is inexhaustible sunlight. Of all the cereal crops developed in Zimbabwe, maize or corn is a standout amongst the cereals. The hardships of transportation and rate of deterioration turn out to be less as the moisture content in maize reduces. The dominant part of Zimbabwean commercial farmers loses a considerable measure of grain during post-harvest and storage. Most farmers depend on drying their produce by spreading their maize utilizing regular unforced airflow on wooden platforms and infield. The regular drying of maize is ineffectual because of drying rate, cleanliness and nature of drying. This causes the requirement for better drying systems that give spotless, quality, storage condition to guarantee the protected storage of grain all through the season.
1.1 Background
Maize is a cereal food utilized for sustenance by both person and animals. During harvesting, maize, for the most part, has a high moisture content of about 20%-25% which is a decent domain for the development of growths that typically cause maize harm. With the end goal to keep away from this, drying of maize must be done to decrease the moisture content to about 11.8%-13% for safe all year storage. Most common farmers in Zimbabwe harvest their maize in April and store them in wooden platforms to dry. A few farmers like to leave maize in the fields to dry and harvest their maize in May. These two techniques for drying take long to dry and influence the quality of maize. Issues of farmers being turned down to deliver their maize to Grain Marketing Board (GMB) are currently increasing. GMB just acknowledges maize with a most extreme of 12.5% moisture content. Most communal farmers are forced to sun-dry their maize at the GMB doors as they won’t have dependable transport (for the most part scot-truck) to ferry their maize back home to dry. This has been seen to diminish the benefits of communal farmers as the maize is additionally stolen at the GMB doors. The rate of reliance on climate has incredibly influenced the present maize drying process in Zimbabwe. On occasion rain and humid air cause the deterioration of the maize which affects the output of maize. Harvesting losses too have been seen to be an issue by the present maize drying process in common grounds as windy conditions blew away maize from the sun drying platforms.
1.2 Problem Statement
The present common maize drying techniques are monotonous, time-consuming, wastage, as far as production and thus having a low clean level. Technological methods which have been created throughout the years utilize power which is not readily accessible in most Zimbabwean common grounds. In addition, power utilization is not economic when there can an option sustainable power source like solar energy. The need to spare time, reduce labour, enhance the quality of dried maize with a better clean technique and additionally the utilization of sustainable solar energy has brought about having a solar maize dryer. A parameter control system is additionally expected to consequently control the reaction of the maize dryer when unfavourable conditions are available like humid air and low-temperature air.