In order to overcome the problem of bacteria in water, the sterilization products of drinking water on the market are mainly ultraviolet (UV) sterilization. According to the difference of wavelength, ultraviolet can be divided into ultraviolet A (UVA), ultraviolet B (UVB) and ultraviolet C (UVC), among which UVC has the strongest sterilization effect. At present, research institutions in Germany, Japan, the United States, Canada and other places are actively developing UVC sterilization related technologies.

In recent years, LED has faced the red sea of price competition, and UVC disinfection and sterilization market is widely used. However, the existing traditional UVC water filter light sterilization technology still depends on mercury lamp to produce UVC sterilization. It is not only large in volume and fragile in lamp tube, but also prone to mercury pollution and great harm to the environment. Led experts from Taiwan Industrial Research Institute have been engaged in LED related research for a long time, so they want to start with their best LED light source to find better solutions for the industry.

To develop UVC LED light source, we should first face how to select the correct UVC wavelength on the LED light source, and try the influence of various bands on microorganisms between UVC 200nm and 280nm, so as to find the spectrum in line with the absorption of bacteria and microorganisms.Then we have to face how to effectively play the role of sterilization and optimize the UVC light utilization, which involves the design of the mechanism. Therefore, the research team constructs the channel where the water flow can be most irradiated by the UVC light source in the smallest area, and enhances the UVC intensity of the projected inlet flow channel, hoping to achieve a water flow of 2 liters per minute and eliminate more than 99.9% of E. coli, Achieve the best sterilization effect.The team has invested in R & D in combination with many large LED manufacturers in Taiwan, gradually established a complete upstream, middle and downstream independent industrial chain of UVC led in Taiwan, and created a high value-added blue ocean market.

"Portable UVC led mobile water sterilization module" has also been successfully transferred to manufacturers. It is expected to be listed at the end of 2018, so that more families can enjoy clean water resources. In the future, it can be used in industries that attach great importance to water quality, such as biomedical industry and aquaculture industry. As long as UVC led mobile water sterilization module is installed at the water inlet and outlet, the water quality can be further improved.At present, due to its small size and easy installation, this technology can be carried around and quickly installed at each water outlet terminal. It is not only suitable for ordinary homes, but also can be used for emergency response in disaster areas. For example, in case of earthquake or other disasters, this water purification product can quickly supply people with dry, clean and safe water. This technology is also shortlisted in the 2018 global top 100 science and technology awards.Zhu Mudao, director of the Institute of electro-optical systems of the Industrial Research Institute, said that through such technological development, we can not only save costs, but also get rid of the restrictions on use.

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