A few days ago, the Ministry of Education issued the "Technical Requirements and Provisions for Membrane Treatment Drinking Water Equipment in Primary and Middle Schools" (referred to as "standards"), which clearly recommended that ultra-membrane treatment of drinking water equipment be used in primary and secondary schools. When equipped with a pure water device, reverse osmosis technology is available. As soon as this standard came out, the debate over the appropriate technology for direct drinking water equipment on the campus and the degree of filtration and purification were finalized. In the future, schools will have evidence in the process of purchasing and using direct drinking water systems.
There are frequent incidents of unsafe drinking water.
According to media reports, Chinese children currently stay in school for more than 8 hours, and drinking water at school accounts for 70% to 80% of daily drinking water. Therefore, drinking water on campus has become a food safety issue of concern to the entire population.
However, with the development of China's economy, water environment problems are common. In 2014, 60 of the 98 major and sensitive emergencies dispatched and reported by the Ministry of Environmental Protection involved water pollution incidents. According to statistics, there are still more than 15 million rural school teachers living in drinking water in China. According to the data of the "Twelfth Five-Year Plan" for China's rural drinking water safety projects released by the Development and Reform Commission, the Ministry of Water Resources, the Ministry of Health and the Ministry of Environmental Protection in March 2012, there are 114,000 rural schools in China that need to address drinking water safety problem. The quality of water in schools in some areas is not up to standard and the water treatment capacity is insufficient or lacking, which leads to the substandard quality of drinking water and seriously affects the healthy growth of children. Therefore, it is urgent to turn off the good drinking water on campus.
Issue industry standards to build protective walls for campus drinking water safety
The problem of drinking water safety on campus is so prominent that it is particularly urgent to improve the drinking water environment and upgrade the drinking water on campus. At present, the mainstream technologies capable of purifying raw water include ultrafiltration and reverse osmosis. Among them, ultrafiltration technology can coarsely filter water quality, can remove large particles of impurities such as sediment, but can not remove harmful substances such as heavy metals, suitable for areas with good water quality; reverse osmosis technology filters out almost all substances in water, including The beneficial mineral elements of the human body, the effluent is almost pure water, which belongs to excessive filtration. Pure water has no nutrition, is acidic and highly soluble, and can easily cause loss of the original mineral elements in the body, causing demineralization of the human body. It is not suitable for children with fast growth and development as long-term drinking water; nanofiltration technology circumvents the first two technologies The disadvantages are not only the effective removal of harmful substances in the water, but also retaining the mineral elements needed by the human body to ensure the safety and health of drinking water.
Therefore, the industry standard issued by the Ministry of Education clearly stipulates that the membrane treatment drinking water equipment in primary and secondary school students' campuses should adopt nanofiltration or ultrafiltration filtration methods. Only in areas with a high risk of raw water pollution or when the school's medical office is equipped with pure water devices The use of reverse osmosis technology pointed the direction for the use of drinking water equipment on campus.