Water treatment ----- Applications of ultraviolet light
Thread Content
Ultraviolet disinfectors are widely used and hold great value in water treatment; they work by using ultraviolet light to destroy microorganisms, preventing them from dying and reproducing. Ultraviolet sterilizers are widely used in areas such as municipal sewage, industrial wastewater, and drinking water treatment. Thanks to intelligent control, they feature energy savings, reduced consumption, and a long service life!
The original poster mentioned the advantages; let me talk about the disadvantages: (1) When the ultraviolet dose is insufficient, pathogens cannot be effectively killed. These pathogens may repair themselves through photosynthesis or \"dark repair\" mechanisms, and it lacks a lasting bactericidal effect, so it cannot address the issue of recontamination in the water distribution system after disinfection. (2) Organisms, minerals, suspended particles, etc. in water can accumulate on the surface of the UV lamp cover, affecting its sterilization efficiency. Preventive measures should be taken to avoid scaling of the UV lamp tubes, and regular cleaning is necessary. (3) Turbidity and TSS have a significant impact on ultraviolet disinfection. In the use of low-pressure ultraviolet lamps, the maximum allowable value for TSS in the incoming water is 30 mg/L; good sterilization results can be achieved when TSS is at or below 20 mg/L, and even lower, at less than 10 mg/L. (4) It cannot maintain its bactericidal effect after disinfection; moreover, it consumes a lot of electricity, resulting in high disinfection costs.