I am from Xianyang. What is used for disinfection of tap water?

Chlorination method is often used for disinfection of tap water. The main purpose of chlorination of public water supply is to prevent water-borne diseases. This method has been popularized for more than 100 years, and it has relatively perfect production technology and equipment. Chlorine used for disinfection of tap water has the advantages of good disinfection effect, low cost and almost no harmful substances. However, after understanding and studying the theoretical data, it is found that chlorine still has some disadvantages in disinfection of tap water. Chlorinated tap water will produce carcinogens. At present, relevant experts have put forward many improvement measures. Chlorine gas is easily soluble in water and combines with water to produce hypochlorous acid and hydrochloric acid, and hypochlorous acid plays a major role in the whole disinfection process. For inorganic substances with peculiar smell, they can be thoroughly oxidized and disinfected. For algae, bacteria and other living natural substances, they can penetrate the cell wall, oxidize their enzyme systems (enzymes are biocatalysts), inactivate them, hinder the life activities of bacteria and die. Hypochloric acid itself is neutral and easy to get close to bacteria, showing good bactericidal effect. Hypochlorite ion also has a certain disinfection effect, but it is difficult to get close to negatively charged bacteria (negatively charged bacteria), so its disinfection effect is much worse than hypochlorous acid, so chlorine disinfection effect is better than bleaching powder disinfection. At present, disinfectants include chlorine dioxide and ozone in addition to chlorine. The use of alternative disinfectants can reduce the generation of harmful substances and improve the treatment efficiency.