Food drying is used as one of the oldest preservation technique in which food is dried either by dehydrated or desiccated

Food drying is used as one of the oldest preservation technique in which food is dried either by dehydrated or desiccated. Drying could inhibits the growth of bacteria, yeasts and mold through the removal of water. Propose two (2) suitable equipment that could be applied in food drying for hygienic purpose along with the explanation on the equipment's' drying concept and reliable scientific explanation on how drying method can be one of the food preservation technique. State your reference (s) for your answer.