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UV Treatment for Municipal Wastewater

Protecting and Preserving our Environment

The final step in the municipal wastewater management process is treatment. Treatment is required to reduce and break down the microorganism populations in the wastewater before discharge into the receiving body of water.

How UV Light Treats Wastewater

UV light provides rapid, effective inactivation of microorganisms through a physical process. When microorganisms are exposed to germicidal wavelengths of UV light, they are instantaneously rendered incapable of reproducing and infecting. The process adds nothing to the water but UV light, has no impact on chemical composition or dissolved oxygen content, and does not create by-products.

TrojanUV Systems for Wastewater

A photo of a TrojanUVSigna bank in a raised position


The TrojanUVSigna® incorporates innovations, including TrojanUV Solo Lamp® Technology, to reduce the total cost of ownership and drastically simplify operation and maintenance. It is the ideal solution for treatment plants in need of revolutionary UV technology.

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A photo of a TrojanUV3000Plus module


The TrojanUV3000Plus® is one of the reasons why UV is now a favored technology in wastewater treatment. Often touted as a flagship UV system, it has demonstrated effective and reliable performance around the world. In fact, over 2,000 municipalities rely on it to treat over 30 billion gallons of wastewater every day.

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A photo of a TrojanUV3000PTP module


The TrojanUV3000®PTP is pre-engineered for quick, inexpensive installation and is ideal for small wastewater treatment applications. The system can be equipped with prefabricated stainless steel channels and transition boxes for integration with existing flanged piping.

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A photo of a TrojanUV3000B module


The TrojanUV3000®B is a simple, yet robust, wastewater treatment system for small communities and towns.

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A photo of a TrojanUVFit chamber


Depending on site and design conditions, wastewater treatment plants producing filtered effluent sometimes prefer a treatment solution using in-pipe (also called closed-vessel) UV chambers. The TrojanUVFit® offers an effective, compact, and energy-efficient solution for non-potable reuse.

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A photo of a TrojanUVFlex 100 Series chamber


The TrojanUVFlex® is ideal for non-potable reuse and other wastewater applications where the treatment of filtered tertiary effluent is required. It is designed with features to make installation and operation simpler, faster and more cost-effective than ever before. Built on the TrojanUV Solo Lamp Technology platform, TrojanUVFlex allows for energy-efficient high-intensity delivery of UV light in an extremely compact footprint.

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UV & Chlorine for Wastewater Treatment

Chlorine gas is typically delivered to wastewater treatment plants in large cylinders mounted on trucks or trains. It must be transported and handled with extreme caution. Training programs, certifications and emergency preparedness must be in place and routinely practiced.

Sodium hypochlorite is a diluted liquid form of chlorine. It too must be handled and stored with caution, and containment and leak protection equipment must be in place.

UV treatment systems are simple and straightforward to operate. Operation of a UV system requires no special training or certification, beyond standard start-up training.

Tasks for maintaining a UV system include replacing UV lamps, cleaning the quartz sleeves that house the lamps (though many UV systems now have automatic sleeve cleaning), and routine monitoring for treatment performance.

Effective Against Cryptosporidium and Giardia

Another key advantage of UV is its ability to inactivate chlorine-resistant microorganisms – most notably Cryptosporidium and Giardia. The release of these into receiving lakes and rivers increases the potential of contamination in communities that rely on these same bodies of water for their drinking water source and recreational use.

Wastewater Reuse

Municipalities must balance increasing population growth, dry climates and heavy irrigation/agricultural demands. Recycled wastewater provides a cost-effective, local and sustainable water supply for multiple non-potable uses.

Wastewater treatment for non-potable reuse involves a series of well-established biological and physical process steps including filtration and treatment to ensure the water is safe for distribution.

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