CHALLENGE
Prior to environmental discharge, wastewater is disinfected to ensure pathogens present in the water are inactivated. Ultraviolet (UV) disinfection is becoming a widely accepted treatment technology for wastewater disinfection due to the deleterious effects of chlorine on aquatic life. The ability for the UV light to penetrate the water is directly related to the concentration of suspended particles and organic matter in water that absorb or scatter the light.
SOLUTION
Monitoring UV Transmittance (UVT) provides the necessary information as to the amount of light lost due to scattering and absorption through a water column; and therefore, is a critical component of effective UV disinfection. To ensure proper inactivation of pathogens, an effective UV dose needs to be calculated based on UVT, UV light intensity and flow rate (exposure time).
RESULTS
- Assurance of effective disinfection
- Low UVT alarm for off specification performance
- Improved effluent quality
- Public health and safety