Why use chlorine to disinfect tap water instead of ozone

First of all, the history of chlorine is much earlier than that of ozone; nowadays, both the purchase cost of chlorine and the cost of using it are lower than that of ozone. Ozone's persistence is not enough, in the pipeline network on the way to the immediate depletion, easy to breed bacteria. Therefore, even if the general use of ozone disinfection also need to add chlorine residual in the water.

Secondly, the ozone in our country has just started, ozone technology and ozone applications now belong to the growth period. So now the water plant are in the early stages of ozone promotion. Chlorine disinfection effect is very good, but due to the pipe network problems resulting in poor water quality at the end of the delivery. The main reason is that ozone needs to generate equipment, compared with liquid chlorine, large investment, energy consumption is also large. Ozone is more often used in the removal of pollutants in the early stage (many water supply plants will be set up before the ozone contact pool, after the ozone contact pool)