Application of the hottest UV disinfection technol

2022-07-25
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Application of ultraviolet (UV) disinfection technology in fruit juice beverage industry

summary: in the process of fruit juice production and processing, effective sterilization treatment is essential. Ultraviolet (UV) disinfection technology, as a general disinfection treatment, is winning more and more recognition. Ultraviolet light kills microorganisms by destroying their DNA structure. UV disinfection technology can avoid the use of chemicals, and can be used for disinfection of water supply, syrup, clean water, waste water, filtration system and packaging surface. At the same time, the installation and maintenance of the UV system is very simple and convenient

the fruit juice industry must comply with the most stringent quality and health standards. Bacteria bred by water pollutants or fruit juice ingredients will cause color change, taste change, shorten the shelf life of beverages, and increase the risk of infection among consumers. At the same time, the national health standards and relevant industry standards require manufacturers to reduce the amount of chemical additives and preservatives in food, which further increases the difficulty of food preservation. Therefore, effective sterilization and disinfection treatment in the production process is more important

UV disinfection is an efficient and non chemical method to inhibit deterioration. Ultraviolet light can kill all pathogenic microbial tissues known to humans, including bacteria, viruses, yeasts and molds (and their spores). It is a disinfection technology with low maintenance cost and no harm to the environment. It not only avoids the use of chemicals, but also ensures an efficient disinfection level

principle of ultraviolet disinfection

ultraviolet is an electromagnetic wave between visible light and X-ray. The wavelength range is nm. When the thickness of special wave film continues to increase (> 500um), ultraviolet (also known as UV-C) has a strong sterilization effect in the long range, and the sterilization ability is the strongest when the wavelength is 265nm. Ultraviolet rays kill microbial tissues by penetrating cell membranes and destroying DNA, making them unable to reproduce and effectively destroy them

a typical ultraviolet disinfection system is to install an ultraviolet lamp tube installed in a quartz protective sleeve in a stainless steel cylindrical cavity. Let the treated liquid enter from one end of the chamber and flow out from the other end. In fact, any liquid can be effectively treated with ultraviolet light, including untreated pipeline water, treated process water, sewage, fruit juice and syrup

based on the type of UV lamp, UV disinfection technology can be divided into two types: low pressure and medium pressure. Low voltage lamps only have monochromatic UV output (only limited to a single wavelength of 254nm), while medium voltage lamps have polychromatic UV output (wavelength range between nm)

advantages of UV disinfection

compared with other disinfection methods, UV disinfection has incomparable advantages in anti hair adhesion. Ultraviolet rays will not produce toxins or residues, nor will they change the chemical composition, taste, smell and pH value of the disinfected liquid. This characteristic is particularly important in the fruit juice beverage industry. In the chemical disinfection, the addition of chemicals to the production water will cause the taste change and change the chemical characteristics of the product

ultraviolet treatment can be applied to raw water disinfection or as a link of other water treatment processes, such as activated carbon filtration, reverse osmosis or low-temperature sterilization. Because UV disinfection has no continuous disinfection ability, its best position in the treatment system is at the end. In this way, the microbial pathogens introduced in all previous links can be completely killed, so as to minimize the pollution probability of subsequent production

application of ultraviolet disinfection in fruit juice and beverage industry

direct contact water

although the general municipal water sources do not contain harmful or pathogenic microbial tissues, this cannot be used as a basis. In addition, individual water sources such as natural springs or groundwater may also be polluted. Any water used as a juice ingredient or in direct contact with the product may become a pollution source. The purification of water by ultraviolet disinfection technology does not rely on chemical composition or heating disinfection, so that the process water can be reused, which not only saves the cost, but also improves the production efficiency, and has no risk of affecting the product quality

syrup

syrup added to some fruit juices may be a major breeding ground for microorganisms. Although syrup with high sugar content is not conducive to the growth of bacteria, dormant spores may be activated after the syrup is diluted. Letting the syrup and diluted water undergo UV disinfection before use can ensure that dormant microbial tissues will not be activated again

cip (on-site cleaning) flushing water

CIP final flushing water used to flush impurities and disinfection methods shall comply with microbial safety standards. The fully automated UV disinfection system can be embedded into the CIP rinse water cycle to ensure that the final rinse water will not introduce microorganisms and pathogens. The medium voltage lamp has high mechanical strength and will not be affected by the sudden change of CIP water temperature. For example, if the fluid temperature changes from 10oC to 80oC, the system will not be affected at all

filtration disinfection

reverse osmosis (RO) and granular activated carbon (GAC) are commonly used in the treatment of production water, but they may also become breeding grounds for bacteria. UV disinfection is the most effective method for RO and GAC effluent disinfection. UV disinfection has been used in these treatment industries for many years

dechlorination

gac filter is also commonly used to remove the residual chlorine of process water, remove the "strange" smell after chlorination, and keep the final product fresh without annoying smell. If the ultraviolet disinfection system is placed before the GAC filter absorbs less water, the GAC residual chlorine removal effect can be improved, the service life of the activated carbon filter can be extended, and the system operation cost can be reduced

packaging and surface disinfection

surface disinfection system is used to eliminate bacteria on the surface of all packaging materials, including glass and plastic cups, iron cans, covers and metal sheets. By irradiating the surface of the package with ultraviolet light before canning, all food spoilage phages can be killed, thus extending the shelf life of the fruit juice

disinfection of the top space of storage tanks

storage tanks or pipes used to store perishable liquids cooperate in the industrialization and batch utilization of high-strength steel, aluminum alloy high vacuum die-casting, semi-solid and powder metallurgy molded parts. It is necessary to fill air to maintain pressure, and the UV disinfection system can be used to disinfect these air. The storage tank is particularly easy to become a breeding ground for bacteria or be polluted by spores in the air. To prevent this, the immersible UV disinfection treatment system can be designed to be installed on the upper end of the storage tank to disinfect the air filled space

wastewater

it is not necessary to use chemicals harmful to the environment for the treatment of wastewater discharged by fruit juice treatment equipment. This ensures that all emissions comply with local environmental protection regulations. As mentioned above, the production water can be treated and recycled by ultraviolet disinfection, which can also greatly reduce the amount of waste water generated

finally

for increasingly stringent health standards, it is a real challenge for the production of fruit juice drinks to meet these standards. When improving the plant equipment and process, they need to be able to quickly recover the investment cost and significantly improve the product quality. At this time, UV disinfection is undoubtedly the best choice

UV disinfection is an economical and practical choice for manufacturers committed to improving product quality. It has been the most mature scheme for drinking water disinfection in the world. It has been widely used in some fields with high cleanliness requirements, such as pharmaceutical and electronic chip manufacturing. These industries have the highest requirements for water quality, and ultraviolet disinfection has also achieved great development in these fields

the ultraviolet disinfection system is easy to install, and the existing facilities of the factory can be slightly modified to meet the requirements. Their maintenance requirements are also very low. The only thing to do is to replace the UV lamp every 12 months or so according to the specific use conditions. The replacement operation is very simple. It only takes a few minutes to complete, and it can be completed by ordinary maintenance personnel. (end)

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