| Ultraviolet
light is invisible, electromagnetic energy with wavelengths between visible light and
x-rays. UV light has long been acknowledged as a means of disinfection because of
its ability to kill bacteria by penetrating their outer membrane and impairing proper DNA
function.
Wastewater disinfection with ultraviolet light is a process that has proven to
be superior to other disinfection methods. Many micro-organisms are not easily inactivated
by chlorine or ozone whereas relatively low UV will provide the level of disinfection
required. Operation and maintenance is less costly and less time consuming with UV
systems, as compared to other disinfection methods. UV eliminates storage, handling and
transportation hazards associated with chemicals and gasses. Through the use of UV:
chlorine, its byproducts, and the need for dechlorination is eliminated.
When UV light is harnessed and properly transmitted, it provides a practical, safe and
inexpensive means of water disinfection.
This is achieved through the use of low pressure mercury vapor lamps generate UV
radiation in wavelengths as 2537A capable of destroying virtually all known forms of
microorganisms and viruses. |
