Water purifier guide ---- Reverse osmosis membrane (RO)

Principle:

Use a "high-pressure water gun" to force small molecules to "drill small holes"

The core of the reverse osmosis membrane is a semi-permeable membrane with a pore size of only 0.0001 microns. The way it works is special:
1. Pressurized sieve: apply pressure through the water pump (like using a high-pressure water gun) to force water molecules from the high-concentration solution (raw water) to squeeze through the semi-permeable membrane and enter the low-concentration side (pure water).
2. Impurity interception: Substances larger than water molecules (heavy metals, viruses, bacteria, antibiotics, etc.) are all "rejected" and discharged with wastewater.
To put it simply, RO membrane is like a "super security check" of the customs - only the "good citizens" of water molecules are released, and all other suspicious elements are intercepted!

Functions:

The "hexagonal warrior" of the water purification world.

Reverse osmosis membranes can single out almost all water pollution problems:

1. Heavy metal busters: toxic metals such as lead, mercury, and arsenic cannot pass through.
2. Virus Terminator: Even norovirus (0.27 microns) can be intercepted.
3. Limescale dissipation technique: Thoroughly filter out calcium and magnesium ions, and it is difficult for the kettle to scale.
4. All-round protection: against pesticide residues, antibiotics, microplastics and other pollutants.

But the cost is also obvious: it will "attack indiscriminately", filtering out minerals that are beneficial to the human body, such as calcium and magnesium.

 Features:

The "little temper" behind the "good student".

The pros and cons of RO membrane are like two sides of the coin:

Benefits:

High filtration accuracy: the pore size is only 0.0001 microns.

2. Strong water quality universality: whether it is tap water, well water, or high hard water, it can produce stable pure water.
   3. Long-lasting and durable: It can even be used for 2-3 years under normal use (depending on water quality and water consumption).

Disadvantages:

1. Need to be powered: rely on the water pump for pressurization, and cannot work during power failure.
   2. Wastewater generation: For every 1 liter of water generated, about 1-3 liters of wastewater are discharged (the specific wastewater ratio depends on the model).

Notes:

Don't let the "artifact" become a "minefield"

If you want the RO machine to stably output the "black technology" effect, don't ignore these details:
   1. Try to install the pre-filter element: PP cotton + activated carbon filter element should be "blocked knife" first, otherwise the RO membrane will soon be blocked by large particles.

2. Change the filter element regularly:
   - The first three filter elements (PP cotton, activated carbon) should be replaced every 6-12 months (the specific replacement cycle should be determined according to water quality and water consumption).
   - RO membrane is replaced every 2-3 years. Note: When the water output is reduced by more than 20%, the membrane status needs to be checked, and the conductivity of pure water needs to be replaced when the conductivity of the primary RO> is 10μs/cm or the secondary RO> 5μs/cm, and when the desalination rate is < 90% or the pressure difference > 0.3Mpa, it needs to be replaced immediately.
   3. Don't waste wastewater: The discharged wastewater can be mopped and flushed into the toilet, which is environmentally friendly and saves money.
   4. Do not need to cut off the water for a long time: do not need to close the water valve for more than 3 days to prevent bacteria from growing in the membrane.
       5. Winter anti-freezing: stop and empty the machine when the temperature is below 5°C to prevent the RO film from being frozen.
       6. Choose a water purifier with flushing function: automatic flushing can reduce scaling and extend the life of the RO film.