Dehydrating is a process of removing moisture from food, and dehydrating are used to preserve foods for long periods. A dehydrator is a specialized tool that use consistent airflow and controlled heat to remove water from various types of food. Because a dehydrator uses airflow rather than high heat, a person must manage the relationship between heat and moisture to ensure the food is safe and the texture is correctness.
If a person uses heat that is too high, the food may look dry on the outside but remain moist or unsafe on the inside. Therefore, a person must use the correct temperature for each specific category of foods. Herbs are delicate foods that requires low temperatures during the dehydration process.
How to Dehydrate Food Safely
If a person uses high temperatures to dry herbs, the herbs will lose their volatile oils, and the herbs will lose their scent and flavor. For example, basil and rosemary must be dried at lower temperatures then meat because herbs are more delicate than meat. Additionally, different foods require different temperature tiers based off how dense the food are.
Vegetables requires moderate temperatures during the dehydration process. A moderate temperature allow moisture to move to the surface of the vegetable so that the moisture can evaporate. Many peoples choose to blanch vegetables before the dehydration process begins.
Blanching is a step that halts enzyme activity, and halting enzyme activity prevents the vegetables from changing color. A person can test if a vegetable is properly dried by checking if the vegetable pieces snaps easily when a person breaks them. Fruit contains a high amount of sugar, and the high sugar content in fruit can make the fruit very stickily if the fruit is not dried correctly.
The goal for fruit is to reach a leathery and pliable consistency where the fruit bend without cracking. A person should slice fruit into uniform rings or strips so that every piece of fruit dry at the same rate. If the fruit slices are not uniform, some pieces of fruit will be under-dried and other pieces of fruit will be over-dried.
Meat and jerky requires much higher temperatures than fruit or vegetables because meat carries a higher risk of bacterial growth. A person must reach specific internal temperatures during the dehydration of meat to ensure that bacteria are neutralized. Because meat is a high-risk food, a person should never guess the temperature for meat, and a person should always follow specific heat requirements for poultry and beef.
After the dehydration process is complete, the food must reach room temperature before the person places it into containers. If a person puts warm food into jar, the food will release residual moisture into the jar, and the residual moisture will cause mold to grow. Once the food is at room temperature, a person should use airtight glass jars or vacuum seal to store the food.
Storage of dehydrated food requires a controlled environment. A person should store dehydrated food in a cool, dark place because humidity can damage the food. Additionally, a person should label every container with the type of food and the date of processing.
Labeling the containers help a person maintain a rotation of food so that the food doesnt sit in storage for too long. Success in dehydrating requires patience and an understanding of how different foods reacts to the heat and airflow of a dehydrator.