High-voltage electrostatic preservation technology is an ideal preservation technology, which refers to the high-voltage electrostatic solution of vegetables and fruits at ultra-low temperature or normal temperature. It is a purely physical whole process, which has the advantages of instantaneous reduction, balanced efficacy, safe and practical operation, small temperature rise, low energy consumption, less environmental pollution, environmental protection and very good maintenance of nutrients in fruits and vegetables. In the whole process of mechanical equipment operation, static electricity can hydrolyze gas and produce a small amount of ozone, which has the functions of sterilization and inhibition of microbial growth and development.
Ozone preservation technology is a cold sterilization technology, which has the advantages of wide coverage, high efficiency, fast speed and no residue. Ozone has obvious bacteriostatic effect on many microorganisms, and can oxidize and dissolve ethylene, slow down the ripening and senescence of fruits and vegetables, regulate the physiological metabolism of fruits and vegetables, reduce the photosynthesis and metabolism level of fruits and vegetables, and increase the storage period. Excessive ozone application concentration will damage the surface plasma membrane of fruits and vegetables, expand its permeability, leak chemicals in somatic cells, reduce the quality, and even accelerate the aging and decay of fruits and vegetables.
Ultra-low temperature cold chain technology refers to the ultra-low temperature freezing technology that implements ultra-low temperature storage in the whole process of commodity circulation, storage, transportation and market sales after fresh fruits and vegetables are picked, so as to avoid the decrease of freshness and quality. Ultra-low temperature can inhibit the activities of enzymes such as fruits and vegetables and slow down the redox reaction of fruits and vegetables; It can inhibit the growth and reproduction of microorganisms and reduce the consumption of nutrients, which is the key way to keep fruits and vegetables fresh. However, China's cold chain transportation does not have a detailed industrial chain management system, and it is impossible to keep ultra-low temperature at all stages of commodity circulation, storage, transportation and market sales.
The key of ultrasonic preservation technology is to use ultrasonic cavitation effect to cause instantaneous ultra-high pressure and high temperature in liquid state, which leads to the change of temperature and working pressure, so that some bacteria in liquid state die, viruses are inactivated, and even smaller microbial plant cells are destroyed, thus increasing the preservation period of fruits and vegetables. However, the function of ultrasonic mechanical equipment will cause certain damage to the tissues and cells of fruits and vegetables.
Irradiation sterilization and preservation technology, using direct radiation to fruits and vegetables, causes physical reflection of microorganisms, inhibits or destroys the basic metabolism, growth and development of microorganisms, leads to the elimination of microorganisms and increases the storage period of fruits and vegetables. But compared with other methods, the economy is poor. Moreover, the success of fresh fruit preservation by irradiation lies in variety and quality index, irradiation dose, semi-permeable packaging products, organic chemical solution before irradiation and storage temperature, and the standards are strict.
Coating preservation technology refers to coating a layer of polymer liquid chemicals on the surface of fruit, which becomes a very symmetrical film after drying, which can prevent the gas exchange between fruit and gas, thus reducing the photosynthesis of fruit, slowing down the consumption of nutrients, improving the strength and freshness of fruit and reducing the rot caused by bacterial infection.
With the increasingly urgent pursuit of food hygiene, safety and healthy lifestyle, zero pollution and low energy consumption high voltage electrostatic preservation technology has attracted more and more attention. Up to now, Xiandao Hi-Tech has developed high-voltage electrostatic fresh-keeping machinery and equipment that can be integrated into various places and fruits and vegetables, and has been continuously promoted and applied. We firmly believe that in the near future, high-voltage electrostatic preservation technology can be more widely promoted and applied in the fruit and vegetable preservation industry.