1. Short action time, good sterilization effect
The special heat transfer method of microwave utilizes both thermal and non thermal biological effects to simultaneously carry out deeper sterilization of materials inside and outside in a short period of time.
2. Good product quality
Microwave sterilization maximizes the preservation of the original material's color, aroma, taste, physical and nutritional components.
3. Economic and Environmental Protection
Microwave sterilization does not produce pollution or residue, and is safe and easy to operate. Compared with cobalt-60, the cost is greatly reduced.
4. Convenient and fast
Due to the fact that most packaging materials are 'transparent' to microwaves, sterilization treatment can be carried out on the packaged materials and packaging, reducing labor intensity and making operation convenient and fast.
What are the advantages of microwave sterilization
1. Short time and fast speed. Conventional thermal drying sterilization transfers heat from the surface of an object to its interior through heat conduction, convection, or radiation. It often takes a long time for the interior of the object to reach the required dryness and sterilization temperature. The medium is composed of polar and non-polar molecules. Under the action of an electromagnetic field, these polar molecules shift from their original random distribution state to orientation according to the polarity of the electric field. Under the action of high-frequency electromagnetic fields, these orientations constantly change according to the frequency of alternating electromagnetic waves, causing molecular motion and mutual friction to generate heat. At this time, the field energy of the alternating electric field is converted into thermal energy inside the medium, causing the temperature of the medium to continuously rise. Therefore, microwave heating is caused by the loss of electric field energy by the medium material itself and generates heat. So the microwave heating treatment time is greatly shortened, and under a certain power density intensity, satisfactory results can generally be achieved in just a few seconds or minutes.
2. Low temperature drying sterilization maintains nutrient content. Microwave has a dual sterilization effect of rapid heating with thermal effect and non thermal effect. Compared with conventional thermal drying and sterilization, it can achieve the desired drying and sterilization effects at relatively low temperatures and in a shorter time. The general sterilization temperature is between 65-70. C，75—80。 C or 103-121. In C, the time is 3-8 minutes, and it can retain more food nutrients and flavors such as color, aroma, taste, and shape.
3. Energy saving microwave power conversion efficiency is high, generally above 70%. Microwaves directly process food, and the heating box itself is not heated, so there is no additional heat loss, so it is energy-saving and can generally save 30-50% of electricity.
4. Uniform conventional thermal drying and sterilization start from the surface of the material and then transfer to the interior of the material through thermal conduction. There is a temperature difference between the inside and outside of the material, resulting in poor consistency in drying and sterilization effects. In order to maintain flavor and shorten processing time, the internal temperature is often not sufficient, which affects the drying and sterilization effects. Raising the processing temperature can improve this phenomenon, but it leads to a decrease in the quality of the surface of the item, such as color, aroma, taste, and shape. Microwaves have penetrative properties, acting simultaneously on both the surface and interior, ensuring that both internal and external temperatures reach the required values, resulting in uniform drying and sterilization.
5. Easy to control and achieve automated production of microwave food drying and sterilization equipment. The operation is simple, easy to control, without thermal inertia, and can be processed according to different food process specifications, reducing production operators and lowering production costs.
6. Compared with conventional sterilization, the equipment is simple and the process is advanced,Microwave sterilization equipmentNo need for boilers, pipeline systems, coal yards, or transportation vehicles, as long as basic water and electricity conditions are met. There are no special requirements for the factory building, resulting in low investment and quick results.
7. Improve working conditions, save floor space. Microwave equipment is free from high temperatures, helpless heat, does not generate heat itself, and has no thermal radiation. It can greatly improve working conditions, and the equipment structure is compact, saving factory space.