Water purifiers, water purifiers, also known as water purifiers, filters, used for sewage treatment. Usually talk about water purifiers, generally refers to small filters used for home use. 
Water purification according to different principles and processes can be divided into many different types. RO reverse osmosis technology which filters the highest accuracy (accuracy of 0.00001 micron filter), one hundred thousandth due to the reverse osmosis membrane pore diameter of a human hair, allowing only water molecules and dissolved oxygen through, all the impurities contained in water, such as pesticides , bacteria, viruses, heavy metals and other harmful substances are almost completely trapped excluded. In addition there are many other reverse osmosis filter  technology: nanofiltration (filtering accuracy between 0.001-0.0001 micron) ultrafiltration membrane (filtering accuracy between 0.1-0.01 microns), fine filtration (0.1 micron filter accuracy below, such as ceramic filters, PP cotton filter, etc.).
PP cotton water purifier can effectively filter the water rust, sand, colloids and all impurities greater than 5 microns in diameter; granular activated carbon filter has a strong adsorption force, can effectively adsorb chlorine, odor , color, pesticides and other chemicals; precision activated carbon filter can effectively remove bacteria, toxins, heavy metals.
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