Industrial microwave heating has its origins in the food industry. Raytheon introduced the first high power microwave heating system is the 1980s, and today there are over a thousand food processing plants around the world using microwave systems for a variety of applications, including:
Tempering frozen meats
Cooking bacon
Preparation of pre-cooked food such as snack products
Sterilization and pasteurization
Drying bakery products to enhance shelf life
Processing raw foodstuffs: fruits, vegetables, herbs, spices
Conveyor belt-type systems are most often used for food processing. They are specially designed to meet FDA requirements and have full washdown/CIP capabilities.