Little knowledge of clean water: the function and function of common water purifier filter on the market

Little knowledge of clean water: the function and function of common water purifier filter on the market

People care about domestic water, and water purifiers become one of the essential home appliances in family life. At present, there are many kinds of water purifiers on the market, and the filter elements used are also various. We can’t know how to clean the water quality of the ordinary consumer water purifier. Here is a brief introduction to how the water purifier can purify the water.
The water purifier relies on the internal filter element to filter impurities and pollutants in the water. It is the core component of the water purifier. At present, the water purifier filter element mainly includes PP cotton, activated carbon, ultrafiltration membrane or reverse osmosis membrane.

PP cotton
The first-stage filter element of the cheap and best water purifier mainly intercepts and filters the water-insoluble suspended matter, sediment, red worm, rust, colloid and the like. As the foremost filter element, it can protect the rear filter element.
Due to the front-end filtration, the filter loss is faster. It usually needs to be replaced in about 3 months.

Activated carbon
Activated carbon is generally made of coal-based carbon or plant carbon (coconut shell, nutshell). After carbonization and activation treatment, it produces a developed pore structure and has a strong filtration and adsorption effect.
In water purification products, activated carbon is mainly used to remove the odor of water and remove residual chlorine. At the same time, it has some functions to filter heavy metal ions, but it is weak.
Due to the wide variety of impurities contained in tap water, in theory, activated carbon can adsorb some of the inorganic and organic substances, including some colloids. However, this will cause the activated carbon to quickly fail, so the activated carbon is often not used as the first-stage filter element, and PP cotton is added in front.

Ultrafiltration membrane
The ultrafiltration membrane is a mechanical sieve membrane with an accuracy of typically 0.01 microns. At this level, most of the impurities can be filtered out, and some heavy metal ions and minerals in the water cannot be filtered. Therefore, in general, the water filtered by the ultrafiltration membrane cannot be directly consumed. However, in the southern part of the water quality, the filtered water of the ultrafiltration membrane has reached the requirement of direct drinking.
Reverse osmosis membrane
The reverse osmosis membrane is the mainstream product of the water purification equipment filter on the market. Under the action of a certain pressure, the reverse osmosis membrane can pass water molecules and other impurities will be trapped. Therefore, the water filtered by the reverse osmosis membrane is basically pure water. Therefore, people often use reverse osmosis water purification equipment. It is called a straight drink machine.
Regarding the flux of the reverse osmosis membrane, 50G, 75G or 400G is generally common. For example, 50G means that the film is continuously operated for 24 hours, and the amount of pure water produced is 50 gallons, which is 189L. At present, reverse osmosis water purification equipment of less than 200G generally has a water storage tank.

In addition, the disadvantage of reverse osmosis is that the wastewater ratio is relatively large relative to its “net” advantage in purifying water quality. Of course, we can make rational use of it and solve the problem of waste.

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