Netizen "Little Five": Recently I am going to buy a water purifier. Can the water purified by the water purifier be directly consumed?
Deng Ruide (Director of the Water Purification Equipment Professional Committee of China Quality Inspection Association): Water purifier products are usually superimposed on various water purification technologies, such as the five-layer filter structure commonly used on the market, including PP cotton filter, granular activated carbon filter, and compression. Activated carbon, reverse osmosis RO membrane, post-composite activated carbon filter, among them, reverse osmosis RO membrane is the core technology, its main function is to filter 0.0001 micron pollutants, bacteria, viruses, heavy metal ions and other harmful substances.
Some manufacturers have also introduced eight-layer, ten-layer and other filtration structure products. In general, purified water treated by reverse osmosis technology can be directly consumed. Some products only have PP cotton or activated carbon filter, which can generally filter sediment, rust, microorganisms, residual chlorine and other substances, but chemical pollution such as heavy metals and organic compounds in water cannot be filtered.
For consumers, it can also be judged by price. According to the production cost of water purification equipment, the market price of water purifiers that generally use reverse osmosis technology is more than 3,000 yuan. In other words, the water purified by the water purifier below this price is best not to drink directly. In addition, the filter element should be replaced periodically to ensure the reliability of the product.
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Influence of external factors on the effect of Drinking Water Treatment Agent
1) Effect of pH value of water: Each flocculant has its suitable pH range, and its range will affect the flocculation effect. For example, polyacrylamide, cationic for use in acidic and neutral environments, anionic for use in neutral and alkaline environments, nonionic for use from strong acid to alkaline environments.
2) Effect of temperature: The reaction speed is too slow at low water temperature, the hydrolysis time increases, affecting the amount of water treated, and the excessively high viscosity of the flocculant will also make the floc fine. On the other hand, if the water temperature is too high, the formed floc is fine, the sludge moisture content is increased, and it is difficult to handle. Therefore, too high or too low a water temperature is unfavorable for flocculation. Generally, the water temperature should be controlled at 20-30 °C.
3) Effect of stirring speed and time: The speed is too fast and the time is too long: the solid of the large particles is broken into small particles, and the particles capable of being precipitated are broken into particles which cannot be precipitated. The speed is too slow and the time is too short: the flocculant can not fully contact with the solid particles, which is not conducive to the flocculant trapping the colloidal particles; and the concentration distribution of the flocculant is not uniform, which is not conducive to the role of the flocculant.
Drinking Water Treatment Agent
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Jinan Huijinchuan Chemical Industry Co., Ltd. , https://www.hjcchemical.com