The use of chlorine to disinfect water is still widely used as a method, people are familiar with the principle of its disinfection. Chlorine disinfection of water, mainly through the oxidation of hypochlorous acid (HClO) for sterilization, because hypochlorous acid is a small neutral molecule, so it can diffuse to the surface of negatively charged bacteria, and then penetrate the bacterial cell wall into the bacterial interior, to play its oxidizing effect on the bacterial enzyme system to destroy and thus kill bacteria.
Chlorine dioxide disinfection of water
Chlorine dioxide (CLO2) is a strong oxidant, it has a very good cell wall adsorption ability and cell wall penetration ability, can effectively and quickly into the bacteria inside the enzyme system to destroy, so as to achieve rapid sterilization, so the use of ClO2 disinfection of water is not lost as an ideal method, which has the advantages of other disinfectants. It combines the advantages of other disinfectants. Because ClO2 is an oxidizing agent, not a chlorinating agent, so it does not react with a lot of organic matter in the water, if the reaction is only generated by the oxidation of the product, will not cause contamination, the sterilization and disinfection of ClO2, far more than the use of Cl and chlorinating agent disinfection.
Use of ozone to disinfect water
Ozone (O3) disinfection technology, can effectively sterilize and disinfect water, because it produces very few harmful substances, and at the same time can make the water dissolved oxygen to increase the water to achieve the decolorization of the water and deodorization, can kill algae in the water, but also decompose and oxidize the water of the Mn, detergents, pigments, as well as suspended particles and organic pesticides, and thus make the water quality to get the best results. Pesticides, which in turn makes the water quality has been greatly improved. The main problem to be solved by the use of O3 disinfection is that its production equipment is relatively large, the production process is more complex, the level of its operation and management requirements are also higher, O3 production rate is relatively low, the consumption of electricity is also relatively large, the infrastructure investment is large, the cost is relatively high; in addition to this, O3 is also a kind of unstable gas, it is easy to decompose in the water. Therefore, it is difficult to guarantee the continuous sterilization effect by using O3 alone.
Use of ultraviolet water disinfection
Use of ultraviolet disinfection technology has the advantage of being more prominent, especially in the case of small amounts of water to give full play to its advantages, i.e., with a low dose in a shorter period of time will be able to kill the bacteria in the water. Ultraviolet disinfection equipment is relatively easy to install, its management and operation are very convenient, more importantly, the use of ultraviolet light for water treatment is a physical treatment, will not add new substances to the water, disinfection of the water will not produce toxic side effects of the product. The virus itself is very weak resistance to ultraviolet light, if the virus through the host of the protection of the virus after the enhancement of the ability to resist ultraviolet light, therefore, the use of ultraviolet light on the disinfection of water should be pre-treated, but also can not guarantee the effect of sustainable sterilization.