{"id":1080,"date":"2026-09-04T15:15:05","date_gmt":"2026-09-04T07:15:05","guid":{"rendered":"https:\/\/www.chengrongtimes.com\/?p=1080"},"modified":"2026-09-04T15:18:57","modified_gmt":"2026-09-04T07:18:57","slug":"why-do-water-filters-easily-breed-bacteria","status":"publish","type":"post","link":"https:\/\/www.chengrongtimes.com\/?p=1080","title":{"rendered":"Why Do Water Filters Easily Breed Bacteria?"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">The Test Results of 28 Water Purification Devices in Italy Tell You the Answer<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">In Italy, although municipal tap water is qualified, many people still choose to drink tap water treated by water filters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, <strong>water filters have one problem: they can easily breed bacteria and sometimes may contain pathogenic bacteria.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Investigation of 28 Water Purification Devices in Italy: Why Are There More Bacteria at the Water Filter Outlet?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Italian health experts conducted an investigation of 28 water purification devices in 19 family-style nursing homes in Bologna.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The investigation found that the devices were divided into two types:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>One type was called a <strong>microfiltration water filter<\/strong>, with a filtration precision of 0.5 microns, composed of a polyethylene membrane and powdered activated carbon;<\/li>\n\n\n\n<li>The other type was an <strong>RO reverse osmosis water filter<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">After testing, it was found that:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. In terms of total bacterial count:<\/strong> whether microfiltration or reverse osmosis, the bacterial count at the outlet was higher than that at the inlet, especially for RO reverse osmosis water filters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. In terms of pathogenic bacteria:<\/strong> Pseudomonas aeruginosa was detected at both the inlet and outlet of the two types of water filters, especially in microfiltration water filters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. In terms of physical and chemical indicators:<\/strong> the residual chlorine in the outlet water of both types of water filters was reduced by half.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In order to prevent bacteria from breeding in municipal tap water during transportation and storage, maintaining sufficient residual chlorine in the water is necessary.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. RO reverse osmosis water filters greatly reduce the sodium, calcium, total hardness, TDS value, and PH value in the outlet water.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These test results reveal a problem worth consumers&#8217; attention:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A water filter does not mean that bacteria will definitely not breed in the outlet water. The filtration structure, filter material, residual chlorine level, and post-filter design of a water filter can all affect the microbial conditions at the water filter outlet.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Inspiration from the Book <em>Drink for Nutrition: Understanding Drinking Water, Minerals and Health<\/em><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The above content is what I saw in the book <em>Drink for Nutrition: Understanding Drinking Water, Minerals and Health<\/em>. This is the book I have read most frequently over the past year.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because the author of this book, Professor Shu Weiqun, is authoritative enough.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">She is the only scholar in China who has been engaged in the long-term research of drinking water hygiene and nutrition. As a practitioner in the ultrafiltration water purification industry, I believe her research can theoretically point me in the right direction and help Chengrong ultrafiltration factory create better products.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As one of the top three in the <strong>pipeline ultrafiltration<\/strong> industry, I think <a href=\"https:\/\/www.chengrongtimes.com\/?cat=12\">Chengrong ultrafiltration factory<\/a> should be able to use the content of this book to provide some industry education for everyone.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">1. Why Is the 0.5\u03bcm Microfiltration Membrane No Longer Mainstream for Kitchen Terminal Water Filters?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">With the development of technology, for water filters used for terminal drinking water in the kitchen, PE microfiltration membranes with a filtration precision of only 0.5\u03bcm have long been eliminated. The mainstream choices on the market are now <strong>PVC ultrafiltration membranes with a filtration precision of 0.01\u03bcm and RO membranes of 0.1nm<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The main difference between ultrafiltration membranes and RO reverse osmosis membranes<\/strong> is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ultrafiltration membranes can retain natural minerals and trace elements in water, while RO reverse osmosis membranes remove minerals from water and produce pure water, and they have a wastewater ratio.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a leading ultrafiltration factory, I do not recommend using <strong>0.1\u03bcm PVDF microfiltration membranes<\/strong> for under-sink terminal water filters, because their filtration precision is too low for terminal water purification. They are more suitable for <strong>whole-house water purification, clarifying turbid well water, and rural yellow muddy water<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, from the perspective of kitchen terminal drinking water needs, consumers need to pay attention not only to \u201cfiltration precision,\u201d but also to <strong>ultrafiltration membranes, RO reverse osmosis membranes, activated carbon filter cartridges, residual chlorine, and the overall structural design of the water filter<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">2. Why Is the Total Bacterial Count at the Outlet of Ultrafiltration Water Filters and RO Reverse Osmosis Water Filters Higher Than at the Inlet?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">This is a problem that many consumers tend to overlook.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because in the water purification industry, there is a default structural design. We usually place an <strong>activated carbon filter cartridge behind the ultrafiltration membrane and RO membrane<\/strong> to improve the taste of the water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is this post-activated carbon filter cartridge that causes the common problem of water filters easily exceeding bacterial standards.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Post-activated carbon is porous, moist, and rich in organic matter. It is simply a paradise for bacterial reproduction, while pure water itself has no antibacterial ability.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, when tap water passes through the RO membrane and becomes pure water containing almost nothing, bacteria may multiply when it passes through the activated carbon filter cartridge to improve its bland taste.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is also why water filters cannot only focus on \u201cfiltration precision.\u201d They must also pay attention to <strong>the internal structure and filter cartridge design of the water filter<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">3. Can a TDS Meter Detect Bacteria in a Water Filter?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many consumers like to use a TDS meter to determine whether water quality is good or bad, but do you know?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A TDS meter cannot detect the bacterial content in water because bacteria do not conduct electricity.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, a low TDS value does not mean that there must be fewer bacteria in the water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Similarly, a high TDS value cannot simply be used to determine that the water quality is poor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Especially for ultrafiltration water filters, ultrafiltration membranes can retain natural minerals and trace elements in water. Therefore, the outlet water quality of an ultrafiltration water filter cannot simply be judged by the TDS value.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If consumers are truly concerned about <strong>water filter bacteria, water filter outlet water safety, and whether water filters easily breed bacteria<\/strong>, they cannot only look at the data from a TDS meter.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">4. How Does the ChengrongTimes Mineral-Like Water Filter Solve the Problem of Water Filters Easily Exceeding Bacterial Standards?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">As a high-end water filter brand, ChengrongTimes is positioned with TOP1% quality in the industry, targeting the TOP2% of end users who are not sensitive to price but have extremely high requirements for quality. How does our <strong>mineral-like water kitchen water filter<\/strong> solve the common problem of water filters exceeding bacterial standards?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>We have made three innovations:<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A. Abandoning the Commonly Used Granular Carbon Filter Cartridge in the Industry and Switching to a More Expensive Activated Carbon Filter Cartridge<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Although carbon fiber costs more, activated carbon fiber has a higher adsorption efficiency for impurities in water that affect taste, such as odors and residual chlorine. It has a longer service life, and the taste improvement effect is also obvious.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">More importantly, compared with ordinary granular carbon, it is less likely to hide dirt and impurities and breed bacteria.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, in the filter cartridge structural design of ChengrongTimes water filters, we pay attention not only to filtration precision, but also to <strong>the material, service life, taste improvement, and bacterial growth issues of activated carbon filter cartridges<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">5. Why Does ChengrongTimes Place Activated Carbon Before the Ultrafiltration Membrane?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">B. Whether it is an RO water filter or an ultrafiltration water filter, the industry always likes to add a post-activated carbon filter cartridge behind the membrane, which can both improve the taste of the water and extend the service life of the activated carbon.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, the structural design of the ChengrongTimes mineral-like water filter overturns the traditional practice in the industry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>We place the activated carbon at the front, first improving the taste, and then passing through the residual-chlorine-removing ultrafiltration membrane.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The residual-chlorine-removing ultrafiltration membrane is used as the final-stage interception, intercepting <strong>99.99% of impurities such as sediment particles, bacteria, viruses, and residual chlorine<\/strong> in the water, ensuring that the produced mineral-like water will not be secondarily contaminated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is also the core logic of the structural design of the ChengrongTimes mineral-like water filter:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>First improve the taste, then perform the final-stage ultrafiltration interception, allowing the ultrafiltration membrane to undertake the final filtration function of terminal water purification.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">6. Ultrafiltration Membranes Are Suitable for Both Kitchen Terminal Water Purification and Whole-House Water Purification<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Ultrafiltration membranes can be used for both kitchen terminal water purification and whole-house water purification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For terminal water purification, we use a <strong>residual-chlorine-removing ultrafiltration membrane independently developed by Chengrong<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, for whole-house water purification, we still recommend that customers retain the residual chlorine in the water to inhibit the growth of bacteria in the water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In other words, <strong>the requirements for kitchen terminal water purification and whole-house water purification are not completely the same<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kitchen terminal drinking water focuses more on taste, bacteria, viruses, residual chlorine, and natural minerals and trace elements, while whole-house water purification needs to be designed according to the overall household water-use scenarios.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">7. Why Does the ChengrongTimes Mineral-Like Water Filter Adopt a Dual-Water-Outlet Design?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">C. The ChengrongTimes <strong>mineral-like water filter<\/strong> adopts a dual-water-outlet design.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Mineral-Like Water<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Used for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Drinking<\/li>\n\n\n\n<li>Cooking rice<\/li>\n\n\n\n<li>Making soup, etc.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Vegetable-Washing Purified Water<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Used for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Washing dishes<\/li>\n\n\n\n<li>Washing vegetables<\/li>\n\n\n\n<li>Wiping tables, etc.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The two water paths correspond to different household water-use needs.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">8. Can Vegetable-Washing Purified Water Also Continuously Clean the Ultrafiltration Membrane?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Vegetable-washing purified water only passes through the first three stages of filtration: <strong>folded cotton, activated carbon fiber, and PP cotton<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The daily process of washing vegetables and washing dishes can perform <strong>forward flushing and continuous cleaning<\/strong> on the inner wall of the ultrafiltration membrane, preventing impurities in the water from depositing on the inner wall of the ultrafiltration membrane and breeding bacteria, <strong>preventing biofilm formation<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, the dual-water-outlet design is not only intended to distinguish drinking water from domestic water, but is also a structural design of the ChengrongTimes mineral-like water filter to solve the problems of <strong>ultrafiltration membrane contamination, impurity deposition, and bacterial growth<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">9. Why Should We Pay More Attention to Natural Minerals and Trace Elements in Drinking Water?<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Third, minerals in drinking water are a long-term and fixed source of calcium, magnesium, and other trace elements for the human body, and minerals in water are more easily absorbed by the human body than those in food.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The ChengrongTimes mineral-like water filter can retain natural minerals and trace elements in water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mineral-like water is not only clean, but also healthy.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is also one of the important differences in the core functions of ultrafiltration water filters and RO reverse osmosis water filters:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ultrafiltration membranes retain natural minerals and trace elements in water, while RO reverse osmosis membranes remove minerals from water and produce pure water.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">10. The Biggest Impact of Scale Is Actually on These Household Appliances<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">As for the problem of scale, the scenarios that are actually most affected are not drinking, but <strong>water heaters, washing machines, toilets, and showerheads<\/strong>, which use water for long periods and use heated water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For drinking water, I tend to retain the natural minerals and trace elements in water rather than remove them first and then add them artificially like a pure water machine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, for kitchen terminal drinking water, what I care more about is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>It should not only filter out impurities such as sediment particles, bacteria, and viruses, but also retain the natural minerals and trace elements in water as much as possible.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Chengrong Ultrafiltration, Customers Have Never Had Concerns<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No rust for ten years<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No water leakage for ten years<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>After-sales service for ten years<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ChengrongTimes\u00ae water filters never forgive themselves when it comes to quality<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Shenzhen Chengrong, one of the top three in the pipeline ultrafiltration industry, the only full-supply-chain ultrafiltration factory in the industry, and an ODM\/OEM factory behind multiple global first-line brands.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>After silently being engaged in pipeline ultrafiltration for 18 years, ChengrongTimes\u00ae finally arrived in mid-2025. Its quality is even more insured than an insurance company, and its service is more customer-oriented than the customers themselves.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">FAQ: Frequently Asked Questions About Water Filter Bacteria, Ultrafiltration Membranes, and RO Reverse Osmosis Water Filters<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">1. Can water filters breed bacteria?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. The filter cartridges, internal water paths, and structural design of a water filter can all affect bacterial growth. Especially post-activated carbon filter cartridges, which are porous, moist, and rich in organic matter, can easily become an environment for bacterial reproduction if improperly designed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Why can the total bacterial count at the outlet of a water filter be higher than at the inlet?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Because some water filters use a structure in which a post-activated carbon filter cartridge is added behind the membrane. While the activated carbon filter cartridge improves the taste, it may also become a place where bacteria grow. Therefore, the total bacterial count at the outlet may be higher than at the inlet.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Can a TDS meter detect bacteria in a water filter?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. <strong>A TDS meter cannot detect the bacterial content in water because bacteria do not conduct electricity.<\/strong> TDS values can only reflect the relevant conditions of dissolved substances in water and cannot be used as a basis for determining bacterial content.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. What is the difference between an ultrafiltration water filter and an RO reverse osmosis water filter?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ultrafiltration membranes can retain natural minerals and trace elements in water, while RO reverse osmosis membranes remove minerals from water and produce pure water, and they have a wastewater ratio.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Are ultrafiltration membranes suitable for kitchen terminal water purification?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Kitchen terminal water purification can use PVC ultrafiltration membranes with a filtration precision of 0.01\u03bcm. The residual-chlorine-removing ultrafiltration membrane independently developed by Chengrong can be used for kitchen terminal water purification.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Is a 0.1\u03bcm PVDF microfiltration membrane suitable for kitchen terminal water purification?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As a leading ultrafiltration factory, I do not recommend using a 0.1\u03bcm PVDF microfiltration membrane for under-sink terminal water filters, because its filtration precision is too low for terminal water purification. It is more suitable for whole-house water purification, clarifying turbid well water, and rural yellow muddy water.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Why does the ChengrongTimes mineral-like water filter adopt a dual-water-outlet design?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mineral-like water is used for drinking, cooking rice, making soup, etc.; vegetable-washing purified water is used for washing dishes, washing vegetables, wiping tables, etc. Vegetable-washing purified water only passes through the first three stages of filtration: folded cotton, activated carbon fiber, and PP cotton. During daily vegetable washing and dishwashing, it can perform <strong>forward flushing and continuous cleaning<\/strong> on the inner wall of the ultrafiltration membrane.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8. Can ultrafiltration water filters retain minerals in water?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Ultrafiltration membranes can retain natural minerals and trace elements in water, which is also one of the important differences between ultrafiltration water filters and RO reverse osmosis water filters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9. Is higher filtration precision always better for a water filter?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You cannot only look at filtration precision. Kitchen terminal water purification needs to consider not only filtration precision, but also ultrafiltration membranes, RO membranes, activated carbon filter cartridges, residual chlorine, filter cartridge materials, and the overall structural design of the water filter.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">10. What are the core features of the ChengrongTimes mineral-like water filter?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The ChengrongTimes mineral-like water filter adopts a dual-water-outlet design and solves the problems of water filters easily breeding bacteria, impurity deposition, and excessive removal of natural minerals from water through structural designs such as front-positioned activated carbon, final-stage interception by a residual-chlorine-removing ultrafiltration membrane, and forward flushing of vegetable-washing purified water.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"733\" src=\"https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/09\/chengrongtimes-1024x733.png\" alt=\"\" class=\"wp-image-1083\" srcset=\"https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/09\/chengrongtimes-1024x733.png 1024w, https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/09\/chengrongtimes-300x215.png 300w, https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/09\/chengrongtimes-767x549.png 767w, https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/09\/chengrongtimes.png 1483w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The Test Results of 28 Water Purification Devices in Italy Tell You the Answer In Italy, although municipal tap water is qualified, many people still choose to drink tap water treated by water filters. However, water filters have one problem: they can easily breed bacteria and sometimes may contain pathogenic bacteria. Investigation of 28 Water [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1080","post","type-post","status-publish","format-standard","hentry","category-factory-diary"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"The Test Results of 28 Water Purification Devices in Italy Tell You the Answer In Italy, although municipal tap water is qualified, many people still choose to drink tap water treated by water filters. However, water filters have one problem: they can easily breed bacteria and sometimes may contain pathogenic bacteria. 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