RO filter membrane and things you don’t know?

You own an RO filter with clean, quality water. But you still don’t know how to use the membrane effectively? Misunderstandings about filter membranes that you still don’t have answers to? Please follow our article for answers to help you use it with peace of mind!

1. RO membrane (Reverse Osmosis) – What is reverse osmosis?

RO membrane is a device that treats wastewater or feed water by removing contaminants from water by using pressure to push water molecules through a semi-permeable membrane, the contaminants are removed.

With the ability to remove up to 99.9% of organic matter, protozoa, viruses, and bacteria in water. Removes 95-99.8% of dissolved salts and inorganic impurities in source water.

Widely applied in human life such as producing drinking water or creating pure water for food and pharmaceutical laboratories.

2. What is the function of RO water filter?

With extremely small size, from 0.1 – 0.5 nanometers. The filter eye is only a few times larger than a water molecule, while dissolved solids, bacteria, and viruses are all dozens of times larger in size, with metal ions, although small, being hydrated by the molecule. Water surrounds it so it cannot pass through the filter. So everything is blocked and pushed out through the wastewater except the water molecule.

Water after passing through the RO membrane is completely pure, with the following characteristics: colorless, odorless, tasteless, and free of bacteria. This water source is very safe for health, can be drunk or used to wash fruits and cook.

3. What happens to contaminants passing through the RO membrane?

As water pressure pushes water through the RO membrane and functional filters, such as sediment or carbon filters, impurities are filtered out and then flushed out. What’s left is delicious, clean drinking water.

4. What factors affect the performance of RO membranes?

  • Water pressure at the inlet of the RO membrane: the membrane works most effectively when the membrane’s input water pressure reaches 50 PSI – 80PSI. Therefore, it is necessary to ensure that the input water pressure of the membrane is always at this level. Besides, the system’s input water pressure must be 5 PSI or higher, and the low pressure valve is open for the machine to operate stably.
  • Type and amount of dissolved solids in water: each area will have its own water source characteristics, so the impact on the RO system is also different in terms of the amount of dissolved solids. In water sources with high levels of sodium chloride, the TDS index will fluctuate. If the TDS/salt concentration increases, it will reduce the amount of water permeated, and also lead to the appearance of a coating on the surface of the RO membrane, which in the long run will affect filtration performance.
  • Quality of the filter cores and membranes used inside the machine: This is an important factor that directly affects the performance and quality of the output water source. To achieve the best filtration efficiency, you should choose a water purifier with RO filters and membranes of clear origin and origin.

5. Misunderstandings about the quality of water from water purifiers?

Can new generation RO purifiers compensate for minerals?

Minerals are health-beneficial ions available in water sources. However, if you filter water with RO, most of the minerals will be lost and if you use RO filtered water regularly for drinking, it will also cause the body to lack minerals.

Currently, many companies advertise that new generation 7-10 core RO water purifiers always meet the ability to compensate minerals, creating a sweet and healthy taste for the output drinking water, but this mineral compensation is not due to RO filter materials are different, but because companies add “mineral compensation” components to their equipment, and these minerals are industrial minerals, not natural minerals.

Will RO filtration kill all bacteria and can you drink at the tap?

Of course, through RO, most bacteria will be removed. However, the problem of pipe material and water tank after RO will be the cause of bacteria in the water. Therefore, if the pipes and water tank materials are not guaranteed, you should still boil the water before drinking, or add a UV disinfection device at the point of water use before drinking.

It is suggested that you ask a lot of questions to the manufacturer or equipment supplier before buying to clarify the technical specifications they advertise. NGO specializes in providing equipment and solutions to serve each water use requirement of businesses.

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