Blog
Blog
Industry News
Company News
China monitors drinking water radioactivity; experts analyze water safety
Release time:
2022-12-12 13:39
The Fukushima nuclear accident triggered by the earthquake affected many Japanese water plants, including 13 areas, including Tokyo, where radioactive substances were detected in the tap water. Therefore, the local Japanese government appealed to the public to avoid drinking tap water.
Although Tokyo claimed that the detected radioactive iodine content had a negligible effect on adults, experts still said that the drinking water safety crisis caused by the nuclear crisis would continue in Japan for some time. This caused extreme concern among the Japanese people, and many places saw people queuing up to buy water purifiers and bottled water. At the same time, the use of online ordering services for bottled water and water purification equipment also surged suddenly, to the point where they could not be supplied in time.
According to Japanese media reports, after Tokyo announced that radioactive iodine exceeding twice the safety standard for infant consumption had been detected in tap water at water purification plants, bottled water in Tokyo's supermarkets and 24-hour convenience stores was sold out within hours, and the already scarce bottled water suddenly became difficult to obtain.
Due to the local people's rush to buy water purifiers and bottled water, bottled water is severely short on the market, and water purifiers are completely sold out. Recently, the Japanese government has ordered national manufacturers to increase the production of bottled water, and the Japanese water purification industry has become busy.
Regarding the reason why water purifiers were snapped up by the Japanese people, a reporter interviewed Li Wen, the deputy general manager in charge of technology at Midea Water Purifier, a water purifier manufacturer. He said that the Japanese people snapped up water purifiers because water purifiers using reverse osmosis membranes can intercept and remove impurities and radioactive particulate matter in the water to meet drinking water safety standards. He also said that not every water purifier can achieve the effect of filtering nuclear radiation substances. Because the pore size of the reverse osmosis membrane is less than 0.1 nanometers, which is smaller than the particles of nuclear radiation substances, it can intercept these substances and reduce the harm of irradiated tap water to the human body.
Recently, the Korea Environment Institute also released a set of experimental data showing that reverse osmosis membrane water purifiers can remove radioactive substances, as well as bacteria, viruses, heavy metals, and ionic substances such as 1,4-Dioxane contained in tap water/groundwater, while ultrafiltration membrane water purifiers and nanofiltration membrane water purifiers cannot remove nuclear pollutants. The detection report from the institute also shows that when nuclear radioactive substances are dissolved in water, they exist in ionic form, and when they exist in ionic form, they are larger than the original atomic size. Therefore, the size of nuclear radioactive substances is larger than the pore size of the reverse osmosis filter element, and reverse osmosis water purifiers are a better solution when tap water is contaminated.
Compared with the nuclear contamination of the Japanese sea area and tap water, so far, relevant personnel from the State Oceanic Administration of China have stated that continuous monitoring and tracking by the Oceanic Administration for several days have shown that none of China's sea areas have been contaminated by nuclear radiation. Chen Zhuzhou, an expert from China's Nuclear Emergency Coordination Committee, said that with the diffusion of radioactive substances, China may detect an increase in radioactive levels, but the radioactive substances have been greatly diluted, so they will not reach a level that affects public health. It is understood that according to the requirements of the Ministry of Health, health administrative departments at the provincial level in China have designated medical and health institutions in their jurisdictions to conduct radiation pollution detection, medical treatment, and radiation injury treatment for personnel. Radiation monitoring of food and drinking water has been carried out in 14 provinces and cities including Beijing, Northeast China, and coastal areas.
Next page
Next page
Practical application of IC tower in food processing wastewater treatment
Wastewater from the food processing industry contains a large amount of organic matter, suspended solids, and oils. Traditional treatment methods often face problems such as high energy consumption and long processing cycles. The IC tower (internal circulation anaerobic reactor), with its unique internal circulation structure and three-phase separation system, demonstrates technical adaptability in treating high-concentration organic wastewater. The core advantage of the IC tower lies in its internal circulation mechanism. Through the fluid movement of the internal rising and falling pipes, it achieves thorough mixing of sludge and wastewater, improving biodegradation efficiency. In food wastewater treatment, the IC tower can adapt to influent conditions with a wide range of COD concentrations, especially suitable for the dairy, meat processing, and brewing industries. Practice has shown that when treating oily wastewater, the IC tower can stably achieve a COD removal rate that meets emission standards by reasonably controlling the hydraulic retention time and organic load. In an actual engineering case, a large seasoning production enterprise used the IC tower as a pretreatment unit. The influent COD concentration ranged from 8000-12000mg/L, and after treatment by the IC tower, it was reduced to below 1500mg/L, significantly reducing the burden on the subsequent aerobic treatment unit. The operating data shows that the biogas yield of the IC tower is stable and can be used for energy recovery, further reducing treatment costs.
The effectiveness of IC tower in treating high-concentration organic wastewater
The IC tower (internal circulation anaerobic reactor) is an important piece of equipment in modern wastewater treatment, demonstrating significant technical characteristics in treating high-concentration organic wastewater. Its unique internal circulation system enhances the contact efficiency between sludge and wastewater, making the organic matter degradation process more thorough and showing clear adaptability in treating industrial wastewater with a COD concentration exceeding 3000 mg/L. The treatment effect of this technology is mainly reflected in two dimensions: organic matter removal rate and biogas production. Actual operating data shows that in wastewater treatment for industries such as brewing and food processing, the IC tower usually maintains a high COD removal rate. The granular sludge formed inside the reactor has good settling performance, ensuring the stability of system operation. When the temperature is controlled around 35℃, the microbial activity reaches an optimal state, and the treatment effect is relatively ideal. In the process of treating high-concentration organic wastewater, the volumetric loading capacity of the IC tower is a key indicator that distinguishes it from traditional anaerobic processes. Due to its multi-stage reaction zone design and internal circulation flow pattern, the equipment can withstand high organic load shocks. Pharmaceutical wastewater treatment cases show that the system can still maintain stable operation when the influent COD fluctuates between 5000-8000 mg/L.
In the back-end process of semiconductor manufacturing, the IC handler (integrated circuit testing and sorting equipment) plays a core role in verifying chip functions and screening for quality. Its working principle is to use a precision robotic arm to send wafers or packaged chips to the testing station, and use the probe card and tester to complete the electrical parameter measurement. Then, according to the test results, it automatically sorts out qualified products and defective products. This integrated "test-judgment-sorting" process makes it a decisive link in the quality control before the chip leaves the factory. From a technical perspective, the gatekeeping role of the IC handler is reflected in three dimensions: First, the contact testing scheme can simulate the actual working state of the chip and detect physical defects such as open circuits, short circuits, and leakage; second, the multi-station parallel testing architecture achieves the screening capacity of thousands of chips per unit time, matching the production capacity needs of the packaging and testing factory; more importantly, its test data is directly related to the yield statistics of the chip, providing key evidence for process improvement. Current mainstream equipment supports environmental temperature testing from -40℃ to 150℃, covering the reliability verification needs of different application scenarios such as consumer electronics and automotive electronics. In industrial practice, the testing standards of IC handlers are often more stringent than the terminal application conditions. Taking the case of a major packaging and testing factory as an example
Contact Information
Address: No. 104, Unit 1, Building 2, Far East Ocean Tide Xuan Center, Tangye Street, Licheng District, Jinan City, Shandong Province
Mobile Website
WeChat Customer Service
Shandong Zhiyuan Environmental Engineering Co., Ltd. Copyright reserved This website supports IPV4&IPV6 dual-way access