UV transmission is used where you want to measure the amount of light reaching a sensor or detector. For instance, this method can help determine UV lamp output settings. You should note that UVT value is important for compliance monitoring of the UVT analyzer and determining water quality characteristics. The applications need UVT values of water to ensure UV light delivered is adequate to inactivate the pathogenic microorganism and to ensure the analyzers are well-calibrated.
Why is UV transmission important?
The measurement of UV transmission is quite important for disinfection of drinking water, process water, and wastewater using ultraviolet light. There are low-pressure disinfection systems which disinfect water through the monochromatic UV light at 254 nm wavelength. You should note that effectiveness of this system is determined by dosage which the system delivers to targeted microorganisms in water. Moreover, effective UV dose is mainly dependent on some factors such as exposure time, UVT, and uv transparency.
Studies show that UV transmission varies from one site to another. It is also related to the quantity of colloidal solids, the quantity of organics, and materials in water that scatters and absorb UV light which passes through the water column. If UVT of water is low, the UV light cannot penetrate the water effectively. This drastically reduces the potency of the dosage. Thus, it is necessary to take into account UVT of water. Moreover, you should ensure levels are well-maintained for proper disinfection to take place.
UV for wastewater reuse
Nowadays, there is widespread use of UV transmission technology for the treatment of wastewater. In fact, this technology has been accepted across the world. It is used by water engineers globally to alleviate environmental pressures and safeguard health. UV transmission is quite useful when it comes to wastewater reuse.
The application of computational fluid dynamics has greatly improved ability to predict the confidence of treatment needed using proprietary equipment. Manufacturers use this particular type of equipment to optimize the dosage delivery to reactors and help minimize the energy costs. Traditional UV lamp technology has greatly improved over the years with gains in power density, lamp life, and energy efficiency realized.
Traditionally, chlorine was widely used for disinfection of wastewater. Despite its impressive track record, there are a lot of concerns about disinfection by-products and pathogen inactivation. The good thing about UV systems is that they are very simple to install within the existing pipework. This means that there is minimal disruption to the treatment plant.