UV disinfection and water purification for tanks

It’s in everybody’s interests to talk about the efficacy of disinfecting water. As a primary material to which everyone is entitled and which every living being needs, it is only right that it be used within certain parameters to protect human health.

For this very reason, STB has decided to offer its clients the possibility to use a series of SA-PSA-BTA storage tanks with one of the most effective water disinfection and purification systems currently available in the market, ultraviolet germicidal irradiation (UV disinfection).

The part of the electromagnetic spectrum with wavelengths between 100 and 400 nm (nanometres), is defined as the interval of ultraviolet irradiation; the UV-C make up the sub-interval, characterised by wavelengths between 100 and 280 nm. In order for irradiation to be effective in eradicating bacteria, viruses and other micro-organisms, destroying them and making them inoffensive, it must have an intensity of 254 nm.

To artificially produce UV-C rays, special fluorescent lamps are used containing mercury vapour and made using very pure quartz (>99.99% SiO2), transparent to the UV-C light emitted in almost monochromatic form (>95% of l =254nm).

The radiation creates a photochemical reaction which alters the genetic information in the DNA, the micro-organisms lose their capacity to reproduce and are irreversibly conducted towards their cellular death. The physical process begins as soon as the micro-organism is irradiated by the light, at the right intensity.

The benefits to a system generated by this type of technology are varied. The treatment is completely ecological without the need for any chemical products, the sensory characteristics of the water are in no way varied, thus excluding the formation of sub-products, and sterilisation time is reduced to the passage of the micro-organism through the light. The system is compatible with other methods of disinfection, and finally it improves the efficacy of our products, ensuring excellent performance over time with low management and maintenance costs.

The sizing of the germicidal system is customised based on the type of system, to ensure the best possible disinfection process.