Ultraviolet catalytic sterilization and chlorination combined disinfection method for water

Abstract

The invention discloses a method for sterilizing water by ultraviolet light catalysis and chlorine. The water treatment method combines ultraviolet light catalysis sterilization and chlorine sterilization to sterilize water. The method comprises the following steps: sterilization with the ultraviolet light catalyst is carried out first, and then the chlorine is added to the water within 0-60 minutes for the sterilization, or the chlorine is added to the water for the sterilization first, and then the sterilization with the ultraviolet light catalyst is carried out within 0-60 minutes, or the sterilization with the ultraviolet light catalyst is carried out on the water while adding the chlorine to the water for the sterilization, or the chlorine is previously added to the water before coagulation treatment is carried out on a water sample, coagulation treatment, precipitation treatment and filtration treatment are carried out, and then the sterilization with the ultraviolet light catalyst is carried out for the sterilization, or the ultraviolet light catalysis sterilization and the chlorine sterilization is carried out for treating the water sample after the coagulation treatment, the precipitation treatment and the filtration treatment. The method ensures biological safety and chemical safety of the water sample.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a combined disinfection method of ultraviolet photocatalytic disinfection and chlorine disinfection of water. Background technique [0002] Disinfection is the most important and irreplaceable treatment unit in the conventional water treatment process. Chlorine disinfection is economical and efficient, and is widely used in various water treatment plants, water treatment facilities, and sewage reuse treatment processes. Its disadvantage is mainly that a variety of complex disinfection by-products are generated during the disinfection process, such as strong carcinogens such as trihalomethane haloacetic acid. In addition, chlorine cannot effectively inactivate highly chlorine-resistant pathogenic microorganisms such as Cryptosporidium and Giardia lamblia, which poses a great potential threat to drinking water safety. [0003] For water treatment plants using single chlorine disinfecti...

AI Technical Summary

Problems solved by technology

Its disadvantage is mainly that a variety of complex disinfection by-products are generated during the disinfection process, such as strong carcinogens such as trihalomethane haloacetic acid, etc.

In addition, chlorine cannot effectively inactivate highly chlorine-resistant pathogenic microorganisms such as Cryptosporidium and Giardia lamblia, which poses a great potential threat to drinking water safety

[0003] For water treatment plants using single chlorine disinfection, it is almost impossible to ensure the inactivation effect of anti-chlorine pathogenic microorganisms and maintain a low level of chlorinated organic compounds in the effluent

At present, most surface water sources are polluted by organic substances. In this case, if a large amount of chlorine is used for disinfection, the content of disinfection by-products will increase significantly, forming a contradictory situation.