1. Types of water treatment and disinfection technologies
Water disinfection technology mainly includes ultraviolet disinfection, chemical disinfection, and chemical disinfection also includes chlorine disinfection, chlorine dioxide disinfection, peracetic acid disinfection, ozone disinfection, chloramine disinfection, hydrogen peroxide disinfection, etc. At present, the application of ultraviolet systems in municipal sewage treatment in my country has been launched on a large scale, and more than 50% of sewage treatment plants use ultraviolet disinfection technology. "
Comparison of several common disinfection methods
Second, the principle of deep ultraviolet LED disinfection
Ultraviolet technology is a fast, economical and efficient disinfection technology that emerged in the 1990s. It uses a specially designed high-efficiency, high-intensity and long-life wavelength (110-280) ultraviolet light generator to generate ultraviolet radiation to kill various bacteria, viruses, parasites, algae, etc. in the water. The mechanism is that a certain dose of ultraviolet radiation can destroy the structure of biological cells, and kill aquatic organisms by destroying biological genetic material, so as to achieve the purpose of purifying water quality.
Ultraviolet disinfection is a physical method. It does not add any substance to the water, has no side effects, and does not produce disinfection by-products. However, it lacks the ability of continuous sterilization, so it is generally used in combination with other sterilization methods.
3. Types of UV disinfection lamps
At present, the commonly used ultraviolet germicidal lamps in sewage ultraviolet disinfection systems include: low-pressure low-intensity mercury lamps (LP), low-pressure high-intensity mercury lamps (LPHO, also known as low-pressure high-intensity lamps), and medium-pressure high-intensity mercury lamps (MP).
Among them, the low-pressure lamp system refers to the output power of a single ultraviolet lamp in the ultraviolet disinfection equipment is 30W-40W, which is mainly used in the application of small water treatment plants or low-flow water treatment systems. The low-pressure high-intensity lamp system refers to the output of a single ultraviolet lamp in the ultraviolet disinfection equipment is about 100W, and it is mainly suitable for the application of medium-sized sewage treatment plants. The medium-pressure lamp system refers to the output of a single ultraviolet lamp in the ultraviolet disinfection equipment above 420W. It is mainly used in large sewage treatment plants and water treatment systems with high suspended solids and low ultraviolet transmittance (WT).
