Water is a basic need for human health and survival, and we need it every day for drinking, washing, cooking and hygiene, and it is also necessary to meet basic health needs, the basis of urban development and industrial production, and a key element of agriculture and animal husbandry, providing the necessary water for plant growth and animal drinking.
Currently, most water plants use a treatment method that extracts water from the source, then purifies it through a series of treatment steps, and finally pumps the treated water to the user's home. In this process, the water plant uses a variety of chemicals to ensure the safety and quality of the water.
1.HCO hypochlorous acid:It is generated by adding chlorine gas from the chlorine library to water, which has a strong sterilization and disinfection ability, and can be divided into pre-chlorine and post-chlorine according to the different dosing positions.
2.PAC Polyaluminium Chloride:The polyaluminium chloride solution stored in the dosing room is pumped to the mixing tank and thoroughly stirred with water. The purpose of this process is to make the tiny suspended particles and colloidal ions in the water lose stability, so that they can aggregate, agglomerate, coagulate and precipitate down to achieve the effect of purification treatment.
3.O3 Ozone:It is a strong oxidizing agent formed by discharging O2 oxygen. It has a bactericidal and disinfecting effect, dissolves algal cells and reduces their content. Depending on the dosing location, the use of ozone can be divided into pre-(pre) ozone and post-ozone dosing points.
The use of ozone for water treatment has a good bactericidal effect, poor stability and easy decomposition, and does not leave toxic residues. However, the heavy use of ozone also poses some problems. First, it may corrode metal pipes. What's more, the ozone treatment process produces a certain amount of bromate, which is a known potential carcinogen. In order to deal with this problem, the current approach is to use a certain amount of H2O2 for treatment.
4.H2O2 hydrogen peroxide:It is a strong oxidizing agent with the ability of sterilization and disinfection. However, it is mainly used to combat the formation of bromate. When H2O2 is added to water, it forms a competitive relationship with O3 to avoid the formation of bromate. H2O2 is usually added during the months when the water quality is poor to ensure water safety.
5.KMNO4 Potassium permanganate:It has the effect of oxidizing organic matter and sterilizing and disinfection. When more water is added, it will appear red. Therefore, the dosage needs to be strictly controlled during use.
6.PAM Polyacrylamide:An efficient and reliable method of water treatment. Polyacrylamide is used as a flocculant in water purification plants, where it plays an important role in flocculation, sedimentation and filtration, improving water clarity and quality.
When the raw water contains impurities such as suspended solids, particles, colloids, etc., by adding polyacrylamide, these tiny particles can quickly gather to form larger flocs, which is convenient for subsequent precipitation and filtration. The high molecular weight and polar groups of polyacrylamide allow it to adsorb on the surface of the particles, thereby increasing the cohesion between the particles and improving the flocculation effect.
Polyacrylamide is known as "Baiye auxiliary", so it is better understood. As far as I know, in the industry, the most used brand of polyacrylamide in these water treatments is Shouxin Environmental Protection, and several friends have reported that this is good. It is important to improve the efficiency and quality of water treatment and reduce resource consumption through the rational use of polyacrylamide.
Water treatment polyacrylamide