2. Efficient sterilization with broad-spectrum properties
Among all current disinfection technologies, UV-C technology has the highest broad-spectrum bactericidal ability. It can efficiently kill almost all bacteria and viruses. And it can effectively kill some parasites that pose great harm to humans and cannot be effectively killed by ozone (such as cryptosporidium, giardia, etc.). Table 1 also shows the broad-spectrum bactericidal effect of the UV-C water disinfection equipment.
3. No secondary pollution
Due to the fact that UV-C technology can be controlled solely for sterilization without adding any chemical agents, it will not cause secondary pollution to water bodies and surrounding environments. Do not change any components in the water. For chlorine disinfection, the organic chlorine produced by it and organic matter in water has been recognized to have carcinogenic effects on the human body, and the chloride compounds contained in water can have a counterproductive effect in certain situations, causing toxicity to aquatic organisms and the water environment. The ozone method also has similar issues. A large amount of unpleasant ozone that has not dissolved into water evaporates into the air, which is harmful to the physical and mental health of nearby workers.
4. Safe and reliable operation
Traditional disinfection techniques such as using chlorides or ozone, whose disinfectants themselves are highly toxic, flammable, and explosive substances. The use of these substances poses a potential threat to the safety of on-site personnel, the surrounding environment, and residents, and requires special caution. Our country's *, fire and environmental protection departments have strict transportation, storage and operation regulations for the use of these high-risk substances. These have greatly increased the psychological burden and insecurity of leaders, operators, and surrounding residents in grassroots units. Modern ultraviolet disinfection systems do not have such safety hazards and are a much safer and more reliable disinfection technology for the surrounding environment and operators.
5. Low operation and maintenance costs
Usually, a highly efficient technology is always accompanied by high costs and operating expenses. However, UV-C technology is an exception. Due to the improvement of the core technology of UV-C in the 1990s, UV-C disinfection technology not only has the highest disinfection efficiency among all disinfection methods, but also has the simplest operation and maintenance, and the lowest operating cost. At a processing capacity of one thousand tons, it can reach 4 centimeters per ton of water or even lower. Therefore, its performance price ratio is the highest among all disinfection technologies. It has the advantages of high efficiency that other disinfection technologies cannot match, as well as low cost and operating expenses. At the level of a thousand tons of water treatment capacity, its cost is only half of chlorine disinfection, 2/5 of chlorine plus dechlorination disinfection, and only 1/9 of ozone disinfection cost. Even at a processing capacity of 100000 tons, the investment and operating costs of UV-C are far lower than other disinfection technologies.
6. Easy installation and operation
The UV-C disinfection system is designed with modularity, easy to install, suitable for any installation site conditions, and does not damage the equipment, pipelines, and building structures on site. The system only needs to be connected to the power supply and can operate continuously 24 hours a day, 365 days a year. There is no need to shut down when cleaning the lamp tubes, and it can be used continuously except for regular maintenance that requires 1-2 hours. Chlorine and ozone disinfection operations are complex and require high quality of operators. Any negligence may lead to a decrease in disinfection effectiveness and even cause serious accidents.
7. Small footprint and no noise
The UV-C disinfection equipment that processes 10000 tons of clean water per day only requires 4 square meters of operating space, and the UV-C disinfection system that processes 50000 tons of sewage per day only requires one (10 meters x 2 meters) water channel. And chemical disinfection methods require several times the amount of chemical contact pool land. In addition, the UV-C disinfection equipment relies on self flowing water supply (without the need for a water pump), which does not produce any noise.
8. Continuous high water disinfection
At present, ultraviolet disinfection technology has reached a daily processing capacity of 1.5 million tons of water in practical applications, and can be even larger if needed, which is difficult to achieve with chlorine addition and dechlorination and ozone disinfection methods.
9. Wide range of applications
Among all the current disinfection technologies, there is no one with such a wide range of applications as UV-C technology. It can be widely used in various water bodies (such as clean water, sewage, seawater, etc.) and air disinfection fields, suitable for the disinfection requirements of various industries. Its main application areas include:
Water purification and disinfection: tap water, secondary water supply, direct drinking water, purified water, aquaculture, food and aquatic product processing water, beverage water, pharmaceutical water, electronic high-purity water, etc
Sewage disinfection: municipal sewage, recycled water, hospital water, oilfield reinjection water
Circulating water disinfection: swimming pool water, landscape water, industrial circulating cooling water
Purification of shellfish, disinfection of agricultural irrigation water, and removal of algae from large water bodies
Disinfection of water for military bases, field operations, aircraft, ships, and submarines
Central air conditioning system air disinfection
IIIComparison with several traditional disinfection techniques
The comparison between modern UV-C disinfection technology and traditional disinfection technology is shown in Table 2. It overcomes the shortcomings of existing traditional disinfection techniques. During the disinfection process, no chemicals are added, and no harmful substances are produced or left in the water. It operates safely and reliably, with simple installation and maintenance, especially low investment and operation maintenance costs, and excellent disinfection effect. Many European countries, as well as Canada and the United States in North America, have revised their environmental legislation in the 1990s, recommending the use of UV-C disinfection technology for disinfection of wastewater treatment and drinking water.
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