What are the advantages and disadvantages of chemicals used for disinfection of tap water?

Tap water disinfection has the following types:

1. Liquid chlorine disinfection: the process is mature and the cost is low, but liquid chlorine is dangerous and inconvenient to store and transport, and three substances are produced after disinfection;

2, sodium hypochlorite: the disinfection effect is poor, long-term contact is harmful to the human body, and phenols are easily produced during disinfection, and the probability of cancer caused by long-term drinking of this disinfection water increases;

3. Chlorine dioxide: there are chlorine dioxide prepared on site and finished chlorine dioxide.

(1) field preparation is a chemical reaction between hydrochloric acid and sodium chlorate. Hydrochloric acid and sodium chlorate are products controlled by the state, and there are great risks in purchase, transportation and storage. Hydrochloric acid is also a strong acid, which is very corrosive.

(2) Chlorine dioxide is a commonly used disinfectant in the market at present, with good effect, low cost, safety and convenience, and no other by-products. Is the ideal disinfection products today.