Can UV light kill bacteria?



  1. 0 Votes

    UV light can kill bacteria by damaging the DNA. This occurs when the chemical bonds that hold the DNA together are disrupted; if the damage is severe enough, the bacteria will die. Longer exposure to the UV light is necessary to ensure that all the bacteria is dead. Water or air that is treated with UV light does not resist re-contamination, unlike chemical treatments.

  2. 0 Votes

    UV water purification is an EPA-approved method of rendering water safe to drink. Concentrated UV rays are able to destroy the reproductive mechanisms of bacteria, effectively killing them. UV purifiers are virtually guaranteed to kill 99.9% of bacteria if they generate at least 30,000 microwatt seconds per square centimeter as long as proper flow is maintained.

  3. 0 Votes

    Yes it does. UV light sterilization is a common way to disinfect water, making it drinkable as well as safe for fish hatcheries. the UV radiation damages a microorganism’s DNA, preventing it from reproducing.

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