UVT - Ultraviolet Transmission
UVT (Ultraviolet transmission) is a water quality parameter. The UVT method measures the amount of UV light at 254 nm, that is a simple ratio of the output light(I₁ from a sample and the input light(Io) and is normally written as a percentage:
UVT = I₁ / Io x 100%
In very clean water such as deionised water the UVT will be 100%, as there is no organic matter to absorb light at 254nm.
In untreated inlet water at a water treatment plant, you would see significant lower UVT value. This corresponds to the amount of treatment required.
WTP UVT Applications
UVT in Water treatment plants
• Control of UV disinfection treatment, reducing power costs
• Detection of load changes in water treatment influent
• Determination of organic loads in rivers and lakes
• WTP optimisation