Common sense of water treatment of mineral water equipment
Common sense of water treatment of mineral water equipment 2018-11-21 10:51 1. In the water treatment method of disinfection of mineral water production line, most of the pathogens in the water are inactivated, so that the microbial quality of the water meets the requirements of human health, which is called disinfection. Disinfectants such as ozone, halogens and halogen compounds inactivate pathogens by destroying the basic physiological functional units of pathogens, such as enzymes, coenzymes and hydrogen carriers. Comparison of biocidal efficiency and stability of several disinfectants: biocidal efficiency: ozone>chlorine dioxide>chlorine>chloramine stability: chloramine>dioxochlorine>chlorine>ozone redox potential: 2.07V 1.50V 1.3V thus Ozone is highly oxidizing, and ozone is easily digested into oxygen, and it will not remain in the water to cause harm to the human body. However, because of its high cost, it is basically not used in large-scale water plants, and is often used in advanced water treatment due to its high oxidation level. 2. Membrane treatment technology Membrane separation technologies that use pressure as the driving force include reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF), and microfiltration (MF). The characteristic of membrane separation technology is to provide stable and reliable water quality. Since the main principle of membrane separation of impurities in water is mechanical sieving, the effluent quality is very stable. It is only based on the size of the membrane pore size and has nothing to do with the raw water quality and operating conditions. 3. Activated carbon degradation and adsorption The main characteristics of activated carbon are large specific surface area and pore structure. The surface area of u200bu200beach 1g of carbon can reach 1000 square meters, most of which are the tiny pore surfaces inside the particles. Because the adsorption is the concentration process of the dissolved impurities in the water on the surface of the carbon particles, the specific surface area of u200bu200bthe carbon is an important factor affecting the adsorption performance. factor. Due to the huge surface area of u200bu200bactivated carbon, it shows good adsorption performance. Most of the relatively large organic molecules, aromatic compounds, halogenated hydrocarbons, etc. can be firmly adsorbed on the surface or pores of activated carbon, and have obvious removal effects on humus, synthetic organics and low molecular weight organics. Practice has proved that activated carbon can reduce the total organic carbon TOC, total organic halide TOX, and total trihalomethane TTHM and other indicators. Biological activated carbon: It refers to a water treatment process that combines ozonation and activated carbon adsorption. The characteristics of the biological activated carbon method are: complete biological nitrification to convert NH4+-N into NO-4; biological oxidation of dissolved organic matter can remove mg/l concentration of dissolved organic carbon (DOC) and trihalomethane formation potential (THMFP) ), and organic matter of ng/l to μg/l level. The purpose of adding a small amount of oxidant (usually O3) in water is to convert dissolved and colloidal organic matter into more easily biodegradable organic matter, and to oxidize some humic substances with higher molecular weight to lower molecular weight and easily biodegradable substances. Become a source of nutrients for the microorganisms in the charcoal bed. In the activated carbon bed, organic matter is adsorbed on the surface and small pores of the carbon particles, and microorganisms grow in the large pores on the surface of the carbon particles, and some organic matter is degraded through the action of cellular enzymes. Therefore, the removal of organic matter lies in the dual of adsorption and biodegradation. effect.