What is UVT transmittance?
UV transmittance, or UVT, is a ratio of the amount of ultraviolet light (usually at 254 nm because of its germicidal effect) that passes through a sample of water to be treated to the amount of light that passes through a sample of pure water. The measurement is expressed as a percentage, % UVT.
The treatment of water with ultraviolet light is an extremely fast physical process.
In fact, ultraviolet light mutates and/or degrades the DNA of micro-organisms passing near the lamp.
Once irradiated, they are no longer able to function properly and reproduce. To improve the efficiency of UVC disinfection systems, filters are usually installed upstream of the reactor.
In this section, we will detail: