The UV lamps used for water purification are low (LP) and medium pressure (MP), emitting at 253.7 nm, a wavelength that is bactericidal and may also deactivate cysts and oocysts of protozoa such as Giardia and Cryptosporidium, which are important eukaryotic pathogens resistant to chlorine and Clostridium-bacteria usually found in hospital waste water.
Medium pressure lamps produce more UV energy across a broader range of wavelengths. However, they require significantly more energy to operate. On the other hand, LP lamps require less energy to create a given level of UV output and therefore are more efficient than MP lamps. Furthermore, LP lamps last longer, generate less heat and are less expensive to own and operate than MP lamps. MP lamps have broad UV spectrum and greater UV intensity and thus, they are often used for large volume applications, such as municipal water treatment systems where heat is less of an issue.
Water ApS uses amalgam lamps which yield higher UVC output compared to standard lamps of the same length. The UV lamps need to be cleaned periodically or changed within the recommended period, as substances that adhere to the lamps may reduce their ability to inactivate pathogens over time.
Depending on the water characteristics and the purposes of treatment, Water ApS offers you solutions using either medium or low pressure amalgam lamps which are characterized by high-performance, energy-efficiency, longer life time, and thereby provide high water quality witch complies with the legislation.