A REVIEW: SOLAR DRYERS FOR FOOD PRESERVATION

Food, shelter, clothes: These are three basic needs of human being. Three of them can be produced naturally as well by using artificial methods. But as compared with shelter and clothes, food is having extremely less shelf life. Nowadays world’s population index is so high. But in contradiction of this index, food production rate is really slow. Also whatever food is produced in farms is getting wasted due to various natural disasters as well as manmade activities. This causes improper supply of food to each and every human being. Majority wastage of food occurs due to its minimum shelf life. If we would increase its life then we can overcome this problem. It can be done by removal of moisture content in food product. As open sun drying method have its limitation like contamination by dust, human or by animal. Solar dryer is one of the best devices to increase shelf life of food items. Solar dryer removes moisture content of food and increases its life In this paper we have done a comprehensive study of various types of solar dryers and their advantages and disadvantages.