DMPQ- Explain Ultraviolet (UV) disinfection systems

• Ultraviolet (UV) disinfection systems contact the treated secondary wastewater with UV light bulbs that are encased in clear housings.
• The UV light kills pathogenic organisms by using a germicidal photochemical wavelength.
• Unlike chlorination, UV leaves no residual in the wastewater with which to be concerned.
• Plants that use UV must either have dual UV systems or have chlorination as a backup. Additionally, these UV systems are energy consumptive.

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