As the old saying goes, "water is the source of life", from the early direct drinking tap water and well water, to bottled water began to enter thousands of families, now more and more health-conscious us, hope to further improve the water environment at home, in the development of technology, water purifiers have begun to become the standard in families. Of course, whether the water purifier is just needed, in essence, it depends on the water quality, such as the author's Beijing is a city that burns a layer of scale, if the water purifier is really uneasy at home.
At present, the water purifiers on the market only have front water purifiers, central water purifiers, RO water purifiers, under-kitchen water purifiers, water softeners, pipeline machines and desktop drinking machines. Generally, the new community with good water quality can be directly equipped with a central water purifier, and the old community with good water quality can use the front water purifier + ultrafiltration can also be, if it is in the northern region, it is usually the front + soft water + RO.
The technology is mainly divided into RO reverse osmosis, ultrafiltration and nanofiltration.
Ultrafiltration: filtration accuracy can reach 1 nanometer-0.1 microns, can effectively filter rust, sediment, bacteria, macromolecular organic matter in water, ultrafiltration membrane application in water purifier can achieve large flux and not easy to block, through backwashing so that the filter element maintains a long life, it can retain mineral ions in water.
Nanofiltration: A filtration membrane with a filtration accuracy between RO reverse osmosis and ultrafiltration, which can also achieve desalination like reverse osmosis, but the proportion is lower than reverse osmosis. If harmful heavy metal ions appear in the water, it can remove 80%-90%.
RO reverse osmosis: can achieve 0.1 nm filtration accuracy, can filter out almost all substances in the water, the effluent is close to pure water, although the lack of minerals beneficial to the human body, but do not need to consider too much water safety issues, as for minerals, users can consume from food or other aspects according to demand.
Therefore, RO water purifier has become the most purchased product by families today, it should be noted that the water purifier can not purify nuclear wastewater, because of this reason to buy a water purifier, you must be careful.
So how can we buy the right water purifier?
1 See the approval
No matter what kind of water purifier, the wading parts must be food-grade raw materials. Therefore, the sanitary license approval of water-related products is very important, which is the most basic access certificate for its entry into the market, which is the minimum threshold and requirements for water purifier equipment.
2 Look at the certification
NSF Certification is an independent, credible organization that develops public health standards and certification programs that help protect food, water, consumer products and the environment around the world.
3 Water speed
The water speed is generally expressed in gallons, that is, the 400G, 600G, 1000G you see on the water purifier, the faster the water speed, the more expensive the price, but the less time you wait. The author recommends buying 600G, balancing waiting time and price, if it is not a large batch of water is more frequent, 400G is also a good choice.
4 Look at the cost of use
When buying a water purifier, you need to consider when to replace the filter element, how many times a year it needs to be replaced, and the cost of one replacement.
Wastewater ratio, RO reverse osmosis products will have wastewater discharge, the less wastewater generated, the better.
Look at the electricity consumption of the water purifier.
The consumables of the water purifier are usually not cheap, you need to look at the price of the consumables at the same time before buying, if the price of the consumables can buy a new machine, and need to be replaced frequently, then you can directly PASS off.
5 Additional features
Double water outlet function: RO water outlet is responsible for drinking water, ultrafiltration outlet is responsible for washing rice and vegetables, maximizing the use of filter element, which is a very practical function.
Heating function: At present, some water purifiers can choose to directly out the hot water, so that you can avoid the trouble of boiling water, save a lot of trouble, and it is also a good function worth recommending.
TDS value display: although the TDS value can not fully reflect the purification effect of the water purifier, but to a certain extent it can reflect the current water purifier situation, usually, the TDS value is lower than 30, are relatively normal RO water purifier.
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