Water plays a very important role in human life. In the face of the current situation of water pollution in many places, many families have turned to clean water filters as a popular and effective solution.
Therefore, water purifier manufacturers often overstate the risks of domestic water, making people even more confused and worried about the health of the purpose of selling a lot of products.
With current water sources, water filtration is necessary, but need to understand the nature of each type of water and each type of filter to choose the right type of equipment for the best family.
What kind of water filter is there?
Current water filtration technology is divided into 2 main types: RO (reverse osmosis) technology with brands like Kangaroo, Karofi … and Nano technology (using activated carbon, silver fiber) such as Barrier brand, Geyser …
RO (Reverse Osmosis) technology: uses a micro-sized RO membrane to completely remove impurities to minerals in the water, making it pure like distilled water. Because natural minerals that are good for the body in water like calcium and magnesium have been removed, long-term use of this technology is not healthy. The human body must consume a lot of water daily (about 2 liters) but when the water is no longer mineral, the body will gradually cause conditions such as fatigue, weakness, headache, more serious. symptoms of muscle cramps and impaired heart rate.
Therefore, the solution offered by RO water purifier technology manufacturers is to add mineral-generating cores to compensate for the loss of minerals. However, this artificial solution does not have much effect in recreating the amount of natural minerals in the water. It is for this reason that the current RO technology is increasingly not recommended by the World Health Organization WHO.
In terms of application, for natural water sources or non-clean water sources like in rural areas, RO technology still exerts its effects when it can handle almost all input water, even the cores. Special RO filter can also filter salt, but not the optimal solution due to its high cost.
RO filtration systems also have some disadvantages: they must use electricity because water pressure is often not enough to operate, and discharge a lot of waste water (up to 70%), expensive complex, easy to fail. , takes up space, light or brackish water due to mineral compensation.
RO technology is often used to create bottled pure water, so the long-term use of bottled water is also not good for health, although manufacturers all claim that bottled water is full. Enough minerals necessary for the body. Therefore, it is best not to abuse bottled water in bottled water, especially bottled water with unknown brand and not quality. Bottled water for long periods of time is even reinfected with microorganisms and toxic chemicals from the plastic shell. The taste of bottled water is usually pale due to insufficient minerals or brackish due to artificial mineral compensation.
Currently in Vietnam market, because of profit and cost saving, some companies only import filters from USA and Europe, and other components are often imported from China, these components are often imported from China. The price is cheap, but the quality is not guaranteed.
Nano technology: with a membrane gap about 100 times larger than RO technology, the filter core is composed mainly of activated carbon, silver-coated core uses Nano technology to increase the surface absorption, ion exchange, kill bacteria … The advantage is compact, easy to install, does not need electricity, does not discharge waste water, the filter’s internal components are calculated to remove chlorine, metal heavy, impurities in the water while retaining essential minerals for the body. Nano technology is standard for maximum efficiency with tap water in urban areas.
Urban tap water is fresh water that has been treated by industrial sedimentation, then uses Chlorine (Chlorine) chemicals to disinfect and kill bacteria in the water. However, it makes tap water unpleasant, can react with some other organic substances to form toxic organic chlorine. In addition, tap water has many heavy metals, impurities, oil, pesticides, etc. which industrial water treatment systems cannot eliminate.
Nano water filtration technology has a good ability to solve the problems of urban tap water as mentioned above, but the disadvantage is the initial investment cost is quite high (usually from 3.5 to 5 million), capacity Filter is not high, quick to replace the filter due to the Nano membrane can not be re-washed (no self-cleaning mechanism like RO membrane) and high replacement cost. A built-in Nano filter can filter about 10,000 liters of tap water while the number of RO technology is 25,000 liters.
In addition to the above two technologies, the market now has a new filtration technology called UF (Ultra Filtration) with the same mechanism of operation as Nano technology but has not been tested and responded to in practice. from experts and users alike.