Our municipal wastewater eBook is now available

Published on by in Technology

Our municipal wastewater eBook is now available

SEE ATTACHED EBOOK

WHY DOES WASTEWATER NEED TO BE TREATED? The final step in municipal wastewater treatment is the inactivation process which is required to reduce microorganism populations in the wastewater before discharge into the receiving body of water. These microorganisms are typically microbes that may cause disease in humans, which must be treated before the wastewater is discharged to a lake or river. There are often recreational activities such as swimming or fishing where the public can come into contact with the local bodies of water. By reducing the concentration of microorganisms in the water, treatment is able to benefit the public. Growing awareness of potential long-term negative impacts of chemical treatment of wastewater along with the generation of toxic byproducts has led to the adoption of treatment alternatives such as ultraviolet light (UV). There are over 11,000 TrojanUV municipal installations throughout the world – these installations include municipal drinking water and wastewater applications and help municipalities achieve their water quality objectives and serve more than one billion people globally. WHAT IS ULTRAVIOLET (UV) LIGHT AND HOW DOES IT WORK? UV light is a form of light that is invisible to the human eye. It occupies the portion of the electromagnetic spectrum between X-rays and visible light. The sun emits ultraviolet light; however, much of it is absorbed by the earth’s ozone layer. A unique characteristic of UV light is that wavelengths between 200 and 280 nanometers (billionths of a meter), are effective for inactivation of microorganisms such as E.Coli and Fecal Coliforms. This region between 200 and 280 nm is also known as the UV-C region or the inactivation zone. This capability has led to widespread adoption of UV light as a highly effective way to treat wastewater and drinking water.¹

 

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