In general, home use RO water purification machine has two to three pre-filters (stage 1 is a 5 um filter, stage 2 is an activated carbon filter, some model has a third stage 1 um filter). For some machine, a final activated carbon filter is installed between the clean water storage tank and gooseneck faucet. The first stage filter is used to remove sediments and sand etc. particles from water. The activated carbon pre-filter is used to remove organics, odorous molecules and chlorine etc. from water. RO membrane can remove most of the dissolved impurities from water. The final activated carbon filter is used to further remove residue contaminants after RO membrane. Use the semi-permeation principle, add pressure to the feed water and force it flow through the semi-permeation membrane to the clean waterside and leave impurities at the other side and be discharged with wastewater.
Since most of the osmosis membranes are synthetic organic materials, to protect the life of osmosis membranes, there shall be residue chlorine removal units in front of the osmosis membrane. Normally, it is accomplished through the use of activated carbon filters. And, to prevent suspended particles blockage problems, a 5 um filter is installed in front of the activated carbon filter. The pre-activated carbon filter and particle filter can remove larger particles. And, the other substances, such as heavy metals, insecticides, bacterial, virus etc. substances toxic to human bodies, and hardness and odor etc. chemical substances that can affect taste are removed by the RO membrane.
Although RO treatment method is the complete method, among all types water purifiers, that can remove all contaminants in water, however, the area between the water storage tank and the water faucet, is the location most accessible to contamination by microorganism. Thus, some companies installed UV disinfection light to prevent bio contamination by pathogen microorganism.
Through RO technology, pure water machine removes bacterial, virus, scales etc. contaminants from water and produces fresh, sweet and drinkable water. However, at the same time, it removes many minerals from water. Another point to make is that, drink pure and clean water for a long period of time, although it is not hazardous to human body, it also reduces the body intake of minerals, not beneficial to health.
Another view is that, specialists consider that the purpose of drink water is to supplement water. There should be extra requirement for water. The minerals and nutrients required by human body should be supplemented by food. For example, doctors would never let people deficient in calcium to drink water with high scale. Their recommendation is to use calcium tablets or drink milk. And at the present time, there is no technology in the world that can guarantee to remove contaminants hazardous to human body from water and, at the same time, preserve substances that are beneficial to human body. Thus, we have option to ingest nutrients from food. And, we cannot select the drinking of dirty water and lead to slow hazards to human body. Thus, for health and safety, it is better to drink pure and clean water.
Both sides have reasonable arguments, we cannot make conclusion as yet. The consumers shall make selection in accordance to personal conditions. However, we can have a peace of mind that for those users that have installed water purifiers in home, there is one user has used for more than 8 years. No loose of hair and teeth conditions developed as yet.
This is a misunderstanding. The food that people consume in daily life has much more minerals even compared with the ones in a small pool.
According to American Medical Journal, people get the minerals mostly from daily meals instead of water. Therefore, you don’t need to worry about suffering from Osteomalacia if you consume the water through RO System.
In addition, currently there is not a water treatment technology that could preserve the beneficial minerals but filter all the hazardous substances. Hence, it is recommend filter all the elements out from the water and consume the minerals from food and fruit.
After the water filters from the Reverse Osmosis System, the TDS* would decrease to around 30-50 ppm. (The salt rejection of RO machines is around 94%. As per the TDS in Kaohsiung Taiwan is 500 ppm, after the water source filtered from the RO membrane, the TDS would decrease to 30 ppm.)
(If you need to learn more about the water quality analysis in Taipei City, please visit us at https://goo.go/eD3b4r . If the filtered water in Taipei is close to pure water, does it mean that the civilians there would suffer from Osteomalacia?
Easywell has committed to produce RO Systems, water filters for home and industrial uses in Taiwan since 1986. We insist to use RO membrane technology to remove hazardous compounds and give you the purist water.