Two Hong Kong University of Science and Technology (HKUST) professors Yang Jinglun and Guan Jizu led the research team on the 16th to announce the development of a "small-pulse electric field sterilization device" that effectively kills more than 90% of bacteria in seconds, including reducing the chance of contracting veterans' disease. , Make water safer.
There are two designs of the device, which are made of copper and stainless steel. Using specially designed small electrodes, when the water flows through the device, the power will be constantly on and off, and the speed can reach 100 times per second. The generated electric field can destroy the cell membrane and thus kill Bacteria belong to a purely physical sterilization technology.
The device is different from the traditional water disinfection methods, such as chlorine gas and odor, heating or filtration. Professor Guan Jizu explained that chlorine gas and odor are all chemical substances. To control the amount of water added to the water, it will damage health and even cause cancer. The filtration method is basically not bactericidal.
He pointed out that similar methods are also used in the disinfection of beverages, but the machines used are large and the voltage is as high as 10,000 volts. It is not feasible to use them at home. With the new technology, the device is about the size of a fist and only needs to use two. One AA (two sections) battery can be started, and it can be installed in water tanks, hoses, showers, etc. Two batteries can be used for six months. The life of the device is about one year.
Professor Yang Jinglun said that the design concept is based on the objective of keeping water quality constant and using less electricity. Without chemical substances, water quality changes, and most countries in backward countries lack electricity. The device only needs about 30 volts to be used, which will help improve them. Live, provide clean and safe water. He also pointed out that after using the device, the water can be directly consumed without boiling.
According to reports, the production cost of the device is about HK$20. The research team hopes that the technology can be used at home at an affordable price. It can be purchased for several tens of dollars. However, since the water flow through the device takes several seconds to sterilize, it is necessary to control the flow of water. So that water can stay in the device, the technology still needs improvement.
The R&D project has received more than HK$900,000 from the Hong Kong Innovation and Technology Fund. It has been carried out for 15 months. The team is currently working with the Queen Elizabeth Hospital and is conducting field tests. It is scheduled to end in October this year.
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