Efficient and energy-saving method for improving berry freeze drying through cooperation of laser pretreatment and microwave spouting

• Main Authors: ZHANG MIN, SUN QING, ARUN MUJUMDAR, YU DONGXING, YU WANSHUAI
• Format: Patent
• Language: Chinese; English
• Published: 14.08.2020
• Subjects: FOODS OR FOODSTUFFS; FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J; HUMAN NECESSITIES; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES

The invention discloses an efficient and energy-saving method for improving berry freeze drying through cooperation of laser pretreatment and microwave spouting, and belongs to the technical field offruit and vegetable food processing. The method comprises the followings steps: subjecting specially pre-frozen berry materials to laser multi-point perforation treatment, performing dehydration witha microwave spouting freeze-drying technology, and then performing packaging. According to the invention, special quick-freezing and laser perforation technologies are utilized to significantly increase physical diffusion channels of the materials, material drying hot spot distribution is homogenized through the microwave spouting technology, the problems that common freeze drying is high in energy consumption and poor in microwave drying uniformity are solved through cooperative treatment, the product quality is improved, and compared with traditional freeze drying, the time is shortened by 50% or above, the uniformit