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Taiwan Institute of Technology joins hands with LED manufacturers to develop UVC LED technology to improve water quality
Sep 13, 2018

In order to overcome the problem of bacteria in water, the sterilization products of drinking water on the market are mainly ultraviolet (Ultraviolet; UV) sterilization. According to the difference in wavelength, ultraviolet light can be divided into three types: ultraviolet A (UVA), ultraviolet B (UVB), and ultraviolet C (UVC). Among them, UVC has the strongest bactericidal effect. Currently, Germany, Japan, the United States, Canada, etc. Research institutes are actively developing technologies related to UVC sterilization.

LED has faced the price competition in the Red Sea in recent years, and the UVC sterilization and sterilization market is widely used. However, the existing UVC filter light sterilization technology still relies on mercury lamp to produce UVC sterilization, which is not only bulky, the lamp is brittle, but also easy to produce mercury. Pollution problems are also harmful to the environment. The LED experts of the Taiwan Industrial Research Institute have been investing in LED research for a long time, so they think of starting from the LED light source that they are best at, and find a better solution for the industry.

To develop UVC LED light sources, firstly, how to choose the correct UVC wavelength on the LED light source, and in the UVC 200nm to 280nm band, try to influence the microbes in various bands to find the spectrum that is compatible with bacteria and microbial absorption.

Then, in the face of how to effectively play the role of sterilization, optimizing the utilization of UVC light, the design of the mechanism is involved, so the research team constructs the channel where the water flow is most illuminated by the UVC light source and enhances the projection. The UVC intensity of the influent channel is expected to reach 2 liters per minute of water flow, which can eliminate more than 99.9% of E. coli to achieve the best bactericidal effect.

The team has now invested in research and development in conjunction with a number of LED manufacturers in Taiwan, and gradually established a complete industrial chain of UVC LEDs in Taiwan to create a high value-added blue ocean market.

The "portable UVC LED mobile water sterilization module" has also been successfully transferred to manufacturers, and 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 applied to industries that attach great importance to water quality, such as the biomedical industry, aquaculture industry, etc. As long as the UVC LED mobile water sterilization module is installed at the water inlet and outlet, the water quality can be further improved.

Due to its small size and easy installation, this technology can be carried around and quickly installed at each outlet. It is not only suitable for general households, but also for emergency response in disaster areas. For example, in the event of earthquake or other disasters, this water purification product is used. It can quickly supply people with clean and safe water. This technology is also short-listed for the 2018 Global Top 100 Technology Awards.

Zhu Mudao, director of the Institute of Electro-optical Systems of the Industrial Technology Research Institute, said that through such technological development, not only can it save costs, but also the restrictions of use.

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