What Is UV Disinfection?

What Is UV Disinfection?

21st May 2020

An ultraviolet (UV) disinfection system transfers electromagnetic energy from a mercury arc lamp to an organism's genetic material. When UV radiation penetrates the cell wall of an organism, it destroys the cell's ability to reproduce.

The effectiveness of a UV disinfection system depends on the characteristics of the wastewater, the intensity of the UV, and the amount of time the microorganisms are exposed to the radiation from the UV light.     

What is Ultraviolet (UV) Light?

It is a form of radiation which is not visible to the human eye. It's in an invisible part of the "electromagnetic spectrum". Radiated energy, or radiation, is given off by many objects: a light bulb, a crackling fire, and stars are just some examples of objects which emit radiation.




Why Use UV Light for Disinfection?

There is no residual effect that can be harmful to humans, animals or aquatic life. UV disinfection uses no toxic or hazardous chemicals to disinfect wastewater. UV disinfection is effective at inactivating most viruses, spores, and cysts. It also has a shorter contact time when compared to other disinfectants; approximately 20 to 30 seconds with low-pressure lamps. It is very important that a UV disinfection system be properly maintained. In the absence of light, organisms can sometimes repair and reverse the destructive effects of UV.

What Do You Need?

The main components of a UV disinfection system are the mercury arc lamp, a reactor, and ballast. We suggest using the Salcor UV 3G Light. It is a complete unit, including controller, glass bulb sleeve, UV bulb, enclosure, and accessories for installation. Each UV light can handle up to 3 gallons per minute (GPM). It can be plumbed in series or parallel for larger flows. The inlet and outlet of the Salcor UV 3G Light is sized 4 inch SCH 40 pipe.