Discussion on common sense of water treatment equipment

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In the disinfection of drinking water treatment methods, inactivating the vast majority of pathogens in the water, so that the microbial quality of water to meet human health requirements, known as disinfection 2. Activated carbon degradation adsorption 3. Membrane treatment technology Pressure-driven membrane separation techniques are reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF), and microporous filtration (MF).
Discussion on Several Common Knowledge of Water Treatment Equipment
 1. Disinfection of drinking water treatment methods, inactivating the vast majority of pathogens in the water, so that the microbial quality of water to meet human health requirements, known as disinfection. Ozone, halogen and halogen compounds Such disinfectants are inactivated by destroying the basic physiological function of pathogens, such as enzymes, coenzymes and hydrogen carriers.
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Comparison of killing efficiency and stability of several disinfectants: killing efficiency: ozone> chlorine dioxide> chlorine> chloramine stability: chloramine> dioxy chloride> chlorine> ozone oxidation and reduction potential: 2.07V1.50V1.3V Ozone has a strong oxidizing, and ozone easily digested into oxygen, will not remain in the water on the human body poses a hazard. But the cost is high, basically not for large water plants, and because of its high oxidation level in the depth of water treatment commonly used.
 2. Activated carbon degradation Adsorption activated carbon is characterized by large specific surface area and pore structure. The surface area of ​​the charcoal is about 1000 square meters, most of which is the tiny pore surface inside the particles. Because the adsorption action is the concentration process of the dissolved impurities on the surface of the carbon particles, the specific surface area of ​​the carbon is important for the adsorption performance factor.
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Due to the huge surface area of ​​activated carbon, which shows good adsorption performance. Most of the relatively large organic molecules, aromatic compounds, halogenated hydrocarbons can be firmly adsorbed on the surface of activated carbon or pores, and the humus, synthetic organic matter and low molecular weight organic matter has obvious Remove the effect. Practice has proved that activated carbon can reduce the total organic carbon TOC, total organic halide TOX, and total trihalomethine TTHM and other indicators. Biological activated carbon: it refers to the ozonation, activated carbon adsorption, etc. combined with the water treatment process.
Bio-activated carbon method is characterized by: the completion of biological nitrification of NH4 + -N into NO-4; dissolved organic matter for biological oxidation, can remove mg / l concentration of dissolved organic carbon (DOC) and trihalomethylene formation potential (THMFP ), And ng / l to μg / l of organic matter. The purpose of adding a small amount of oxidant (commonly used O3) in water is to convert dissolved and colloidal organic matter into more biodegradable organic matter, oxidize some of the higher molecular weight humic substances into lower molecular weight, biodegradable substances and Become a source of nutrients for microbes in charcoal beds. In the activated carbon bed, the organic matter is adsorbed on the surface and small pores of the carbon particles.
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The microorganisms grow in the macropores on the surface of the carbon particles, and the organic matter is degraded by the action of the cell enzyme. The removal of the organic matter is the double of the adsorbed and biodegradable effect.
3. Membrane Treatment Technology Pressure-driven membrane separation techniques are reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF), and microporous filtration (MF). Membrane separation technology is characterized by providing stable and reliable water quality. Since the main principle of the membrane separation of impurities is mechanical sieving, the effluent quality is very stable, only according to the size of membrane pore size, and raw water quality and operating conditions have nothing to do.
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