The Innovation and Technology Carnival 2022 will be held from October 22 to 30. The innovative inventions on display include a number of award-winning works from secondary schools, universities and innovation and technology organizations. Among them, middle school students use kombucha solution to decompose food waste peels, and then use the solidified The kombucha bacterial film is processed and made into edible tableware, which not only has a low production cost and is durable, but also solves the problem of producing a large amount of waste from disposable tableware.
The Innovation and Technology Carnival 2022 will be held at the end of the month.
(Photo by Ou Jiale)
The student research and development team of Carmel Boyu Middle School used the roasted kombucha straws and cups made from kitchen waste peels, which are edible disposable tableware.
They first prepared kombucha powder, put it into the solution, and then put the peel of the kitchen waste into the kombucha solution, and a kombucha film would float on the surface of the solution.
This kombucha film is the prototype of tableware.
Then put the kombucha film into the molding shape, and then put it into the oven to bake, and then you can make the kombucha cup and kombucha drinking tube.
The three students who participated in the research and development pointed out that these disposable tableware can pass the testing and certification of GB 18006-2008, ISO18188:2016 and the EU's new acrylamide regulations, and are safe to eat, biodegradable and have high strength. Multiple awards, including the Bronze Medal at the International Exhibition of Inventions of Geneva 2022.
The team of Carmel Boyu Middle School developed kombucha edible tableware.
(Photo by Ou Jiale)
Kombucha tableware tastes like tasteless potato chips
One of the students who participated in the research and development, Guan Haoting, said that after repeated tests several times, he found that the best way to make tableware is to adjust the pH of the solution to 2.3, and then bake the kombucha bacteria-film tableware for 15 minutes. , the kombucha tableware produced in this way has the most beautiful color and the toughest.
When baked, it tastes like potato chips with no flavor.
Another student, He Zhuo, said that he tried to compare the kombucha tableware with other environmentally friendly tableware such as paper drinking tubes and bamboo drinking tubes. But the kombucha tableware is still tough.
Moreover, the cost of kombucha tableware is low. For example, the cost of kombucha cups is only HK$1.5, while the cost of kombucha straws is HK$0.3.
The price is cheaper than other eco-friendly tableware.
Three students demonstrated using a kombucha drinking cup to hold water and using a kombucha drinking straw to absorb water.
(Photo by Ou Jiale)
Although only shatin pomelo peels or lemon peels are used as raw materials at this stage, the three students will try to use other peels to achieve the goal of reducing food waste.
Those studying in Form 6 pointed out that the participation of senior brothers and sisters in the past helped them a lot in research and development, so even after graduation, they would go back to their alma mater to continue research and development.
PolyU-Research Handheld Non-invasive Liver Stiffness Tester to Help Liver Disease Patients
In the past, to detect liver cirrhosis, it may be necessary to go to the hospital to check with a large instrument, but now it may not be so inconvenient.
Professor Zheng Yongping and his team of Polytechnic University have developed a non-invasive handheld diagnostic tool for liver stiffness measurement – Liverscan, which can make a diagnosis by measuring liver tissue stiffness and degree of fibrosis, hoping to detect liver fibrosis in patients early and receive treatment.
Liverscan utilizes PolyU-patented technology to increase the accuracy of transient elastography measurements through real-time ultrasound image guidance.
This allows for more immediate and preparedness to detect where the liver may be hardened.
The Polytechnic University team developed a handheld non-invasive liver cirrhosis detector.
(Photo by Ou Jiale)
The portable wireless design of Liverscan makes it easy to operate and provides a safe, effective and more comprehensive diagnostic solution for community screening of liver fibrosis patients, early diagnosis and frequent monitoring of liver disease treatment effects.
Liverscan has been selected as a Silver Medal at the Geneva International Exhibition of Inventions in 2021.
The team specially found a student to imitate the examinee. Professor Zheng pointed out that because it is non-invasive, there is no need for surgery.
He hopes in the long run that it can be convenient for the public to use at home.
However, at this stage, it will be trialled in clinics or health centres first.
The above inventions will be exhibited at the "Innovative Technology Carnival 2022" from October 22 to 30, 2022.
The public can visit the Hong Kong Science Park for free.
On that day, there will be a free shuttle bus service between the Hong Kong Science Park and MTR University Station and Tai Wai Station. On Saturdays and Sundays, free shuttle bus services will be provided between MTR Kowloon Tong Station and Admiralty Station to facilitate the public to travel to and from the venue.
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