graphics Wu Shangnan list of common water treatment technology performance water purifiers, water softeners, water purifier and other water treatment products in people's homes are also some days, but still more and more as the product category, processing more "superb" in the face of the various manufacturers promote the concept, there are still difficult to distinguish the authenticity of many consumers think, do not know how to choose. Experts say the water quality of different materials and components function very different processors, consumers should own demand on the water quality carefully selected, special attention to water quality processor "secondary pollution" problem, not to let water device into a "dirty water device."remind articles ; ; see the Certified Anti-忽悠"for the water processor, security is the first, but I understand that many manufacturers now even this basic requirement of the total. "Turning to the market an array of water treatment products, drinking water, public health researcher at the Institute of Beijing, said Zhao Feihong. According to the "drinking water health standards" requirement, water purifier manufacturers to obtain a health permit approval document issued by the Ministry of Health to produce sales, and an approval document corresponds to only one type of water purifier. But it was said, the Ministry of Health approval documents of the manufacturers really are not many, even if obtained approval of the manufacturers, there are "more than one license to use," or approval document is not expired inspection, or unauthorized replacement of documents issued in the reporting structure, group fittings. She suggested that consumers would be best to formal documents issued strict review of manufacturers of building materials supermarkets and home appliances shopping malls to buy products, direct sales in the district for the product must be cautious, be sure to obtain licensing approval document to see its status.knowledge articles ; ; ; understanding of principles of on-demand options Institute of Tsinghua University, Liu Wenjun, said safe drinking water, household water treatment technology of the most common processors are based on membrane filtration technology, activated carbon adsorption-based technology, based on resin and KDF's Switching of three, but each technique has its advantages and disadvantages (see the right table). Select articles; ; ; ; Recommended Carbon + UF; ; ; choose what kind of water treatment units and water quality in the home consumer has a relationship, how to judge quality? Beijing's water quality for which processor? Wen-Jun Liu introduced the major indicators of water quality testing, there are three: First, sensory indicators, mainly for color, rust, turbidity, odor, etc.; Second, indicators of trace organic pollutants; Third, bacterial indicators, mainly referring to chlorine. "The people most concerned about is the sense of risk, sense of harm may not really affect human health. Alkaline water does not mean that water quality is not good, the hardness of tap water in Beijing are in line with national standards, water base with no direct relationship between health, more bad feeling in the senses. Also, if after opening the tap out of Red water, usually caused by corrosion of iron, as long as the extra water for a while, the row of red water clean. "Liu Wenjun said.Liu Wenjun that more expensive water treatment products is not better enough on the line. "I think in the current water quality, the use of two kinds of activated carbon and membrane filtration can be, and activated carbon to remove chlorine and its by-products in water, ultrafiltration is to remove microorganisms and bacteria, ultrafiltration membrane can also inhibit the activated carbon 'run carbon' situation. However, because membrane fouling materials easily in water, metal oxide, particles of suspended matter, colloids and microorganisms such as pollution, so be sure to configure the pre-filter (such as PP cotton) to coarse filter to protect the ultrafiltration membrane. " would like to select functional water purifiercurrently on the market that some manufacturers promote its own water purifier with health and other functions, but according to report, in accordance with the relevant provisions of the Ministry of Health, wading products (including water purification) can not promote any health function that any publicity effect of the water purifier is illegal propaganda. LIU Wen-jun said: "Now on the water purification functions of publicity are credible, the lack of scientific basis. "Zhaofei Hong also, at present some of the water purifier filter with features, some used filter material itself, there will be problems, or even harmful. "As far as I know, some water purifier for the mineralization of water in the ore material in the water solubility of sodium, aluminum, arsenic exceeds the standards, which are harmful to human body. Many people now pursue drinking 'alkaline water', many can produce alkaline water, minerals, dissolved in water, sodium, aluminum ions are generally exceeded. Some water purification filter which would use medical stone. State has done a survey, medical stone produced in some places is very good, but some areas produce the medical stone arsenic is high, exceeding arsenic is potentially carcinogenic, so the net mineralization Water safety device to attract attention. "use articles ; ; ; careful maintenance of secondary pollution prevention ; ; ; ; "Without cleaning, replacement, maintenance, water treatment units can easily be secondary pollution, had become a 'dirty devices' to not install the water than before more dirty. "In 2004, Zhao Feihong had sold in Beijing in the indirect water purifier to test the filter by the KDF, activated carbon, ceramic filter material, macroporous strong acid ion exchange resin. She was found in the test,直饮水机, if you do not use disinfection measures, from the 4th day began to bacterial contamination, 13 days after the bacteria reach 100cfu/ml (per milliliter of seized samples contained the total number of microbial communities), with the use of the number of days increase the total number of bacteria gradually increased to 1 month total bacteria 3700cfu/ml. Japanese researchers have a variety of Japanese water purifier sales to study bacterial contamination, found in non-sterilized activated carbon water purifier bacteria could be detected in the second day running, running to 28 days, reaching 1.2 × 105cfu / ml, after Disinfectant activated carbon water purifier, running to 15 days, total number of bacteria 4.4 × 104cfu/ml."Some people think water filter cartridge is the better, in fact, many filter configurations, if not promptly cleaned, the more prone to secondary pollution. "Zhaofei Hong recommendations every week on the water purifier filter take off for cleaning, disinfection, preferably with backwash water purifier features.Wen-Jun Liu also said that in addition to activated carbon adsorption of trace organics, bacteria also adsorption, activated carbon adsorption of the bacteria reproduced holes, while the absorption capacity is limited, when the adsorption capacity saturated, the adsorption of impurities will fall down too much, and filter membrane will allow many pollutants trapped in the membrane, a long time without cleaning, will lead to the propagation of bacteria and algae. Number of processors set a backwash water feature that can be cleaned in time, the best safe operation in accordance with manufacturer's instructions, backwash water should be more than twice the normal amount of water. But even if the anti-flushing, with the increased traffic, there are material issues of aging, it is best to replace a regular basis. Experts say carbon 3 months a suitable replacement, membrane 1 to 2 years once a suitable replacement, "some manufacturers to find cost-effective for consumers, will replace the time say 3 to 5 years or more, which is incorrect. "Commentscommon water treatment unitsmarket products is the application of technology alone or in combination. Zhao Feihong several common products on the comment.1. water softeners: ion exchange technology, as the main material resin can be removed by the water base scale, water capacity, suitable for handling wash, shampoo, bath, laundry, etc. water.Comments: softening over the water of the sodium ion more, do not remove bacteria, viruses, etc., unless the water purifier with reverse osmosis membrane treatment, can not directly drink use. Water softeners use resin is soft water salt water in the sodium and calcium and magnesium exchange, with the increased use of time, the exchange capacity decreased, the need to use water softener salt for regeneration, which is used in the expenditure must be considered.2. Water Filter: The filter structure, different models have different filter combinations, from a filter cartridge to 9 range, divided into coarse filter net UF water purifier of water device, and two. Coarse filter type with PP cotton and activated carbon filter, to remove the water, the eye various impurities, rust, sediment, odor, residual chlorine, some heavy metals. Ultrafiltration-type membrane or nanofiltration membrane ultra filter, can remove the water of bacteria, viruses, E. coli and other harmful organic molecules.Comments: mainly used for treatment of drinking water, water purifier in addition to water purification, retention of beneficial minerals, can not remove the water alkaline, scale. Coarse filter water purifier against bacteria, viruses, organic matter removal is limited. UF water purifier in the membrane filter, if only, without using PP cotton filter, activated carbon filter, it can not remove the odor, chlorine, easy to plug the film's life cut short, suggested the use of three filter core models used in combination.3. pure water machine: There are a variety of names, such as water purification machine, RO water purifier, pure and experts, most of the use of multi-level filter to determine whether it is Pure water machine, mainly to see if the reverse osmosis membrane (RO membrane). Reverse osmosis membrane pore size of 0.1 nm, the water can filter out bacteria, viruses, and most of the organic matter, but will also filter out a lot of useful minerals.Comments: alkaline water can remove the scale, to electricity, a small amount of water, usually dealing with drinking water. Treated water is pure water, many researchers have pointed out that the long-term drinking water may be the elderly, children, women, health.; ; ; 相关的主题文章：随后在校园论坛发布了相关检测结果
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