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UV Disinfection Principle
UV microbial cells changes the genetic material DNA structure.
After the nucleic acid can be absorbed light can prevent cell replication, thereby killing the cell.
Depends on the number of cells are destroyed and their ability to resist ultraviolet absorbing UV dose of microorganisms.
|
Disinfection methods |
Disinfection time |
Disinfection byproducts |
Cost |
Effects |
Safety |
|
Chlorine |
≥30mins |
trihalomethanes, haloacetic acids, halogenated cyanide |
Lower infrastructure &operating costs |
good sterilization effect of persistent disinfection |
toxic, corrosive, run a certain risk management |
|
Ozone |
5-10mins |
bromate, aldehydes, ketones, carboxylic acids, cyanide dibromoacetone |
greater investment in infrastructure, high operating costs |
kill the virus sterilization effects are good, no continuous disinfectio |
toxic, strong oxidation resistance |
|
Ultraviolet |
5-10s |
No |
low operating costs, close to chlorine effect |
rapid, sustained bactericidal |
good safety |
UV dose = intensity x duration ( mWs/cm2 = Mw/cm2 x seconds)
UV disinfection without chemicals, does not produce three-induced disinfection byproducts (three letter refers to the carcinogenic, teratogenic, mutagenic)
Bactericidal effect quickly, no noise, does not affect the senses water.
Easy to operate, simple to manage, high safety performance, low operating and maintenance costs.
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