What is Municipal water treatment disinfection technology

Water disinfection of municipal water treatment is an important part. Existing municipal water treatment disinfection technology include the following: 1.Cl preparation and chlorine for water disinfection use Cl to a method for water disinfection is still widely used were, people compare it to the principle of disinfection Familiar with.

Water disinfection of municipal water treatment is an important part. Existing municipal water treatment disinfection technology include the following:

1.Cl preparation and chlorine for water disinfection

Cl use to disinfect water is a method still widely used, for its people are more familiar with the principles of disinfection. Use chlorine to disinfect the water, which is mainly through oxidation of HClO sterilization, because hypochlorous acid HClO is a small neutral molecule, so it can diffuse into the surface of the negatively charged bacteria and bacterial penetration bacterial cell walls into the interior, to play its role within the bacterial oxidation enzyme system in order to kill bacteria destruction.

Chlorine is a toxic, highly corrosive chemicals, therefore, its storage and transportation or use them, we must be strict management, it is usually in relatively large water used in treatment plants. Compared to chlorine to chlorine preparations safer, but bleach valid Cl easily broken down, resulting in the use of inconvenience; NaClO can not be stored, must be used in the field, and its gas production is relatively small, limited aspects of the its use is not so widespread. Cl can be sterilized at a faster rate in the presence of water to kill the bacteria, the cost is not very high, but in the process of sterilization Cl easily produce some harmful substances, these chlorinated organic pollutants in the form of organic chloride after only makes water easy to produce odor, and this toxic pollutants and carcinogens on safety of human life threat.

2.ClO2 for water disinfection

ClO2 is a strong oxidant, it has a good adsorption capacity and ability to penetrate the cell wall of the cell wall, it can be effectively and quickly into the destruction of the bacteria inside their enzyme system, so as to achieve rapid bactericidal effect, and therefore the use of water ClO2 disinfection regarded as an ideal method, which combines the advantages of other disinfectants. Because ClO2 is an oxidizer, not a chlorinating agent, therefore, it is a lot of organic matter in water and do not react if the reaction has just generated a product of oxidation, will not cause pollution, sterilization and disinfection of ClO2, far far more than the use of Cl and chlorinating agent disinfection.

3. The use of O3 in water disinfection

Application of O3 disinfection technology can effectively sterilize and disinfect the water, because it generates less harmful substances, while enabling increased dissolved oxygen, to achieve water discoloration and deodorization, can kill the algae in the water, can also be Mn decomposition and oxidation of water, detergents, pesticides and organic pigment particles and suspended, thus making the water quality has been greatly improved. The main problem using O3 disinfection to be solved is that its production equipment is relatively large, production processes and more complex, its level requirements of operation and management is relatively high, O3 system to take productivity is relatively low, the consumption of electricity is relatively big, big infrastructure investment, the cost is relatively high; in addition, O3 is an unstable gas, it is easy to break down in water. Therefore, the use of O3 alone is difficult to ensure continuous disinfection sterilization effect.

4. The use of ultraviolet light to disinfect water

UV can be changed ribonucleotides and deoxyribonucleotides nitrogen-containing substances, which can be formed between the adjacent nucleoside dimer creating new bonds, this action can cause the microorganisms in the water can not be achieved self-replication, so as to achieve the purpose of disinfection. Therefore, the use of ultraviolet light to disinfect water is convenient and fast. But its disinfection effect is influenced by many factors, after water disinfection should also make the necessary pretreatment. Advantages of using UV disinfection technology more prominent, especially in the case of a small amount of water can fully play to their strengths, which uses low doses in a short period of time to be able to kill bacteria in the water. UV disinfection equipment is relatively easy to install, and its management and operation are very convenient, but more importantly is the use of ultraviolet water treatment is a physical process, without adding new substances to the water, the water after disinfection does not produce toxic the product side effects. The ability of the virus itself is very weak resistance to ultraviolet light, protecting the host if the virus after the adoption would enhance the ability of the virus resistant to ultraviolet rays, and therefore, the use of ultraviolet light to disinfect water pretreatment should not be able to ensure continuity of sterilization Effect.