Regular replacement of water purifier filter elements to prevent secondary pollution

Recently, Beijing media exposed that the bottled water of Nongfu Spring is inferior to tap water, and the disorder of sanitation standards of bottled water and bottled water has attracted social attention. Bottled (barrel) water companies should follow the national standard. There is a reason for the recent media and society's attention to bottled (barrel) water standards, and government departments should strengthen the supervision of this type of drinking water. Supervision should be comprehensive, targeting every link in the production and distribution process. The problem of bottled water is more serious than that of bottled water. The current market of bottled water and bottled water is a bit chaotic. Compared with bottled water, the hygiene problem of bottled water is actually more serious. If a bucket of water is not drank within a day, it may have excess bacteria. Therefore, he suggested that if a bucket of water is not consumed within 24 hours, a new bucket should be replaced the next day; in addition, the inner tank of the bottled water equipment should be cleaned regularly to avoid the reproduction of bacteria. Compared with bottled water, water purifiers have less health hazards. It can eliminate the secondary pollution of water pipes. It is reported that the sales of a water purifier company in Shanghai in the first quarter of this year increased by 50% compared with the same period last year, indicating that the public is paying more and more attention to the quality of drinking water. However, experts remind that users should remember to replace the filter element of the water purifier during use, otherwise it will cause another form of secondary pollution. There are a variety of filtration technologies for water purification devices. A technology called RO reverse osmosis can filter tap water into pure water, but scientific research shows that pure water is not suitable for long-term drinking. Water that is beneficial to human health should be weakly alkaline, highly active, and mineral-containing water. The second technology is PP cotton + activated carbon. PP cotton can only filter coarse particles, but cannot filter bacteria in water. Activated carbon can absorb bacteria and residual chlorine in tap water, making the water taste better. The disadvantage of this technology is that the activated carbon must be replaced every two or three months, otherwise the harmful components it adsorbs will cause secondary pollution. The third technology is microfiltration. The pore size of the microfiltration membrane is 0.1-0.2 microns. Since the diameter of bacteria is around 0.1 microns, this membrane cannot completely remove bacteria. The fourth technology uses an ultrafiltration membrane with a pore size of 0.01 microns, which is 1/10 the size of bacteria, so it can filter out all bacteria; at the same time. Because its pore size is larger than calcium ions, þ ions and other minerals, the ultrafiltration membrane can retain the mineral components in the water. The direct drinking water project in the Shanghai World Expo Park adopts the ultrafiltration membrane + activated carbon technology. After working together with the ultrafiltration membrane, the service life of the activated carbon will be relatively long, and it can be replaced every six months to a year.
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