TrojanUV - News & Headlines en Copyright 2019 Trojan UV. All rights reserved Lake Garda, Italy: INTCATCH Program Protects Against Combined Sewer Overflows Tue, 4 Dec 2018 12:00:00 EST Extreme Weather Events on the Rise

Year after year, the world is seeing more frequent extreme weather events, whether it is droughts, extreme temperatures, floods, or severe storms. These weather events can have immediate and undesirable impacts on water treatment facilities and the health of receiving water bodies.

For wastewater treatment plants, large amounts of rainfall or snowmelt can outpace peak flow capacities resulting in sewer overflow, where untreated (or partially untreated) wastewater is discharged, polluting receiving waters. In combined sewer systems, overflows contain not only human waste, but industrial and toxic waste.

Combating Pollution Caused by Combined Sewer Overflows

The pollution caused by combined sewer overflows (CSOs) is becoming a priority concern for countries around the globe. Enter INTCATCH, a Horizon 2020 program funded by the European Union and led by Brunel University in collaboration with 20 partner organizations across seven countries. The team is installing CSO treatment systems along with state-of-the-art monitoring tools that can measure water quality in real-time. The vision is to build the program so that any city or town can use these systems and tools to uncover how best to improve the health of their water source affected by CSOs.


Demonstrating INTCATCH in Villa Bagatta, Italy

Villa Bagatta, Italy, lies on the coast of beautiful Lago di Garda (Lake Garda) and is home to one of five INTCATCH demonstration sites, with other sites located in the UK, Greece and Spain. Lake Garda is the largest lake in Italy and a very popular tourist destination. They currently have 22 pumping stations and gravity CSO channels and 10 submerged CSO tunnels, which were designed years ago when there were fewer peak flow events. Now, with more frequent wet weather, Lake Garda is at risk of high pollution from CSOs.

Lake Garda, Italy

Lake Garda, Italy

INTCATCH begin building Villa Bagatta’s demonstration site in January 2018, when they installed the CSO treatment system comprised of a Salsnes Filter rotating belt filter system, a granular activated carbon filter and a TrojanUV3000PTP UV disinfection system. From January to October, CSOs were simulated using different combinations of raw wastewater and water from Lake Garda and put through the system. Now and until the demonstration ends in the year 2020, real CSO events are being treated by the system.

 A Salsnes Filter rotating belt filter left in blue container, granular activated carbon filters center, and a TrojanUV3000PTP UV disinfection system far right

The demonstration site in Villa Bagatta, Italy: a Salsnes Filter rotating belt filter left in blue container, granular activated carbon filters center, and a TrojanUV3000PTP UV disinfection system far right.

Rotating Belt Filter & UV Disinfection Technology

The Salsnes Filter system is housed in a 20 foot container. Inside, a SF1000 filter (with 90 micron filtermesh), polymer station, mixer and Control Power Panel treat flows up to 50m3/h, removing, on average, 39% of suspended solids. The SF1000 performs solids separation and then transports solids to its integrated sludge thickening stage after which sludge is dropped into a collection area. The Air Knife automatic cleaning system uses compressed air to remove any remaining sludge from the filter as it rotates.

The Salsnes Filter system is housed in a 20 foot container

The Salsnes Filter system is housed in a 20 foot container and removes, on average, 39% of suspended solids from incoming flows.

The TrojanUV3000PTP UV disinfection system is the final treatment step, destroying bacteria, protozoa and viruses before discharging into Lake Garda. UV disinfection is a physical process that instantaneously neutralizes microorganisms as they pass by UV lamps submerged in the effluent. The process is environmentally friendly and chemical-free; it adds nothing to the water but UV light, and therefore, has no impact on the chemical composition or the dissolved oxygen content of the water.

The TrojanUV3000PTP UV disinfection system is the final treatment step.

The TrojanUV3000PTP UV disinfection system is the final treatment step, destroying bacteria, protozoa and viruses before discharging into Lake Garda.

Monitoring Water Quality in Real-time

A number of monitoring tools are in place to show the efficiency of treatment equipment and its effect on lake water quality, including levels of solids/turbidity, pH, heavy metals and E.Coli. Remote-controlled boats and fixed sensors test the water in real-time and are linked to a decision support system (DSS) that helps improve day-to-day decisions about where, when and how to best help the lake.

Remote-controlled boats test Lake Garda's water quality in real-time

Remote-controlled boats test Lake Garda’s water quality in real-time.

The Future of INTCATCH

The INTCATCH program, using well-known and proven treatment technologies, combined with ultramodern monitoring tools, has the potential to help communities around the world reduce pollution caused by CSOs and improve the health of their water bodies.

Once the Villa Bagatta demonstration ends in the year 2020, INTCATCH’s mission will be just that – to find other communities that could benefit from the innovative program they’ve built.

This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 689341
When Does UV-Chlorine Advanced Oxidation Make Sense? Wed, 21 Nov 2018 12:00:00 EST Several large potable water reuse facilities are installing UV-oxidation systems that will use the UV-chlorine advanced oxidation process (AOP) instead of UV-hydrogen peroxide due to its lower cost and logistical benefits.

The Autumn edition of Water Reuse & Desalination features the article “Chlorine Improves UV-AOP Efficiency in Site-specific Conditions”, where our Adam Festger and Scott Bindner explain the conditions under which UV-chlorine AOP makes both practical and economic sense.

Below is a summary and a link to the full article.

Hydrogen Peroxide is the Most Commonly Used Oxidant for UV-AOP

UV-AOP is a process in which UV, along with an oxidant, removes chemical contaminants such as 1,4-dioxane, algal toxins, pharmaceuticals and pesticides from water.

The most common oxidizing agent in use today is hydrogen peroxide (H2O2), which is used at facilities around the world, including the Orange County Water District’s world-renowned Groundwater Replenishment System.

Orange County Water District's Groundwater Replenishment System

The Orange County Water District’s world-renowned Groundwater Replenishment System uses hydrogen peroxide as the oxidant for their UV-AOP process.

Exploring Chlorine as an Oxidant

Recently, research has been undertaken to explore chlorine (sodium hypochlorite and  NaOCl) as an oxidant for UV-AOP. The data shows that under the right conditions, UV-AOP with chlorine can provide significant cost savings compared to UV-AOP with H2O2. These ideal conditions are often presented in potable reuse applications.

When UV-Chlorine AOP Makes Sense

Using chlorine as the oxidant in an AOP makes practical and economic sense when:

  1. The pH of the water entering the UV-AOP system is less than 6.0
  2. Ammonia levels entering the UV-AOP system are low (e.g. under 0.25 ppm)
  3. Quenching of residual H2O2 would be required to prevent regrowth in transmission lines. UV-chlorine removes the quenching step altogether.
  4. Chlorine is already in use at a facility for other treatment processes

UV-Chlorine AOP at The Albert Robles Center for Water Recycling and Environmental Learning

The Water Replenishment District of Southern California is currently constructing The Albert Robles Center for Water Recycling and Environmental Learning (ARC).

This facility will implement an advanced wastewater treatment process for potable reuse which incorporates ultrafiltration (UF), reverse osmosis (RO) and UV-chlorine AOP.

Albert Robles Center for Water Recycling and Environmental Learning

The Water Replenishment District of Southern California’s Albert Robles Center for Water Recycling and Environmental Learning has site conditions that make chlorine the best choice for the oxidant in their UV-AOP. 

The facility will control ammonia levels passing through RO, and by way of UF and RO, pH levels will remain low. If the facility had used H2O2 as an oxidant, quenching would have been required; therefore they have eliminated this step by using chlorine.

ARC has the ideal site conditions to allow them to take advantage of the cost savings offered by using UV-chlorine for their AOP.

Further Reading

About The Authors

Adam Festger: Adam is the Business Development Manager for Potable Reuse at Trojan. Given increasing global water scarcity, he is focused on expanding the use of UV light to convert wastewater into drinking water. He holds a Master’s Degree in Hydrology and a Bachelor of Science in Mechanical Engineering from the University of Arizona. He has over 15 years of experience in contaminant treatment and UV technologies and is a member of the International Ultraviolet and WateReuse Associations.

Scott Bindner:  Scott has spent over 7 years acting as a Market and Applications Specialist for UV Advanced Oxidation Systems at TrojanUV.  He has a Master’s in Biochemisty and a Bachelor of Medical Science Degree in Microbiology and Immunology.  

An Introduction to UV &Guided Tour Around Our Headquarters Tue, 13 Nov 2018 12:00:00 EST
Learn more about these installations, how UV lamps are designed, and about the role our systems play in disinfection applications in this video tour around our head office in London, Ontario, Canada.

UV Disinfection in India Mon, 15 Oct 2018 12:00:00 EST podcast series featuring conversations with influential and interesting people from the water sector and news from the Water Environment Federation (WEF).

At WEFTEC 2018, Dinesh Kumar (TrojanUV India Market Manager) and Wayne Lem (TrojanUV Municipal Market Manager) sat down with Travis Loop, WEF's Senior Director, Communications & Public Outreach, to discuss the importance of the Ganges River to the people of India and the major effort underway to reduce pollution in the river, including new wastewater discharge standards.

More About UV Disinfection in India

What's New in UV Disinfection Tue, 2 Oct 2018 12:00:00 EST TrojanUV's first open-channel UV systems were installed in the mid-1980s. by the 1990s UV systems had become mainstream and were widely adopted for wastewater disinfection.

Since then, innovation in UV water disnfection equipment and technology has continued, with revolutionary advancements along the way that have changed the way we think about UV.

Today, our newer systems offer significant energy, labor and maintenance savings, thanks to the latest in lamp technology, sleeve cleaning and controls/automation.

Improvements to UV Lamp Technology

Fewer lamps (up to 1/ 3rd) are needed to treat the same flow thanks to new technology that can pump out up to 1000 Watts per lamp. As lamps have become more powerful, they have also become more energy efficient, saving users up to 66% energy.

Improved controllers can help realize even more savings. For example, new controllers can automatically adjust lamp power during periods of low flow or changing water quality to conserve energy and extend lamp life, all while ensuring your required dose is being met.

As UV lamps have become more powerful, they have also become more energy efficient.

Labor Savings

In new UV systems, there are up to 1/3rd fewer lamps to maintain and new controller and sleeve cleaning technology that can simplify an operator’s daily work. Smart controllers have expanded the capabilities available for monitoring and automating UV system functions, including diagnostics and alarms. Our ActiClean sleeve cleaning system saves hours of maintenance time by automatically cleaning quartz sleeves to prevent fouling.

Smart controllers have expanded the capabilities available for monitoring and automating UV system functions.

Innovation to Installation

With over 10,000 municipal UV installations, we have many examples of UV innovation in action. One such example is in Chicago; The Metropolitan Water Reclamation District of Greater Chicago (MWRD) – of which the Terrence J. O’Brien Water Reclamation Plant (WRP) is part of – has made a number of upgrades to its treatment process over the years. The addition of UV disinfection was a critical part of these upgrades; it played a key role in improving water quality throughout the Chicago Area Waterway System (CAWS).

Rocky Mount Wastewater Treatment Plant Benefits From UV Upgrade Fri, 4 May 2018 12:00:00 EST In a recent edition of Treatment Plant Operator (TPO), the Rocky Mount Wastewater Treatment Plant shared that cross-training, and a wealth of experience in wastewater treatment by their team members allows them to be highly self-reliant and do most of their own maintenance.

Saving Money & Getting Near 100% Pathogen Kill Rate with UV

It is this confidence in their capabilities and their treatment process that earned the facility the designation as a benchmark plant for its maintenance practices and performance record by the Virginia Department of Environmental Quality.

Town of Rocky Mount Wastewater Treatment Facilities
Photo courtesy of Treatment Plant Operator

Two TrojanUV systems disinfect the effluent at the plant located in the Blue Ridge Mountain region of Virginia. Tim Burton, Plant Superintendent, gives credit to UV disinfection for his ability to save money and assure a near-100% pathogen kill rate.

Upgrading their TrojanUV Systems

The plant first adopted UV disinfection in 1994, after a conversion from chlorine. Two channels of TrojanUV3000™ equipment were installed; each channel had a capacity of 3 MGD and was designed for alternating use.

In 2012, one of the channels was upgraded to the newer TrojanUV3000Plus™ system which has yielded significant operating cost savings (for cleaning and electrical costs).

“The older units have 192 bulbs and a capacity to treat 3.0 MGD, whereas the 3000Plus channel has two units with 24 bulbs each, and each unit is capable of disinfecting 3.0 MGD," says Burton.

Comparison of UV Systems at Rocky Mount WWTP


TrojanUV3000Plus™ – Designed for Efficient, Reliable Performance

The TrojanUV3000Plus is one of the reasons why UV treatment is now a favored technology in wastewater treatment. This highly flexible system has demonstrated effective and reliable performance in thousands of installations around the world.

It is well suited to wastewater disinfection applications with varying flow rates and influent, and offers dependable performance, simplified maintenance and maximized UV lamp output at end-of-lamp life.

Further Reading

TrojanUVPhox™ Helps Orange County Water District Set Guinness World Record Mon, 19 Feb 2018 12:00:00 EST
OCSD Board Chairman and GWRS Steering Committee Vice-Chair Greg Seabourn with official Guinness World Records adjudicator.
OCSD Board Chairman and GWRS Steering Committee Vice-Chair Greg Seabourn with official Guinness World Records adjudicator.

"This is a time to celebrate and learn about this proven technology that is so vital to sustaining our communities and our natural environment," says Greg Sebourn, OCSD Board Chairman and GWRS Steering Committee Vice-Chair.

The GWRS is the world’s largest water purification facility of its kind, currently producing 100 million gallons of highly treated wastewater per day that would have previously been discharged into the Pacific Ocean. A three-step advanced treatment process is used consisting of microfiltration, reverse osmosis and UV-oxidation with hydrogen peroxide.

The official record attempt commenced at noon on Thursday, February 15 and concluded at noon on Friday, February 16 at which point 100,008,000 gallons of purified water had been produced in the designated 24-hour period thanks, in part, to a TrojanUVPhox™ system installed at the facility in 2008. Our Market Manager, Adam Festger, attended the event, and served as an official witness to the record-setting.

TrojanUV Market Manager Adam Festger & National Water Research Institute's Gina Melin Vartanian toast Orange County Water District’s success in setting a Guinness World Record for the Most Wastewater Recycled to Drinking Water in 24 hours.
TrojanUV Market Manager Adam Festger & National Water Research Institute's Gina Melin Vartanian toast Orange County Water District’s success in setting a Guinness World Record for the Most Wastewater Recycled to Drinking Water in 24 hours.

As we continue to face a time of extreme weather and droughts, and work to better support municipalities in local water supply management, we commend and congratulate the OCWD and OCSD on this notable achievement. 

Media Coverage

For more media coverage of the celebration, explore the links below, and to learn more about the origins of the project, watch the GWRS 10th anniversary video.

TrojanUVSigna™ Plays Vital Role in Ourense Wastewater Treatment Plant Thu, 4 Jan 2018 12:00:00 EST Spanish minister of Agriculture, Fisheries, Food and Environment, Isabel García Tejerina, inaugurated the new Ourense Wastewater Treatment Plant (WWTP) on July 26 2017.

Our role in the project was featured in the October 2017 edition of “Environmental Projects, Technology, and News” Digital Magazine. Read the article here.

The Investment

A total of €59 million was invested in the Ourense WWTP project which has provided the city of Ourense with an infrastructure that enables compliance with European Directives on wastewater treatment.

The facility will serve a population of 350,000 compared to the previous capacity of 88,000, and the maximum daily treatment flow will be tripled (from 24,640 m3/d to 72,000 m3/d). The new plant will also enable the treatment of 100% of the stormwater received at the facility.

Ourense Wastewater Treatment Plant
Photo courtesy of ACUAES

The UV Solution

The TrojanUVSigna™ was selected for UV disinfection at the new facility. For wastewater disinfection, the TrojanUVSigna™ offers low total cost of ownership and drastically simplified operation and maintenance compared to alternative systems. Since it's introduction in 2010, it has been installed in a variety of applications – around the world – disinfecting primary and secondary effluents as well as tertiary / water reuse.

More TrojanUVSigna™ News

Wastewater Treatment Plant in Arkansas Says Goodbye to Chlorine and Hello to UV Mon, 27 Nov 2017 12:00:00 EST When it comes to wastewater disinfection, two common methods are widely used today: chemical and physical. Chemical disinfection is typically achieved by chlorine gas or hypochlorite, whereas physical disinfection is by UV light. An increased awareness of the disadvantages of chemical disinfectants, specifically chlorine, continues to prompt wastewater treatment plants to convert to UV.

Take the City of Hot Springs, Arkansas for example. Officials there decided to convert the disinfection at its regional wastewater treatment plant from chlorine to UV. This was done in an effort to eliminate the safety issues associated with chlorine, and to also protect and improve receiving waters.

The UV system that the city selected was our TrojanUVSigna™. The TrojanUVSigna™ is designed to fit into existing chlorine contact chambers without major modifications to the channel depth or width. It also incorporates innovations, including TrojanUV Solo Lamp™ Technology, to reduce the total cost of ownership and drastically simplify operation and maintenance.

UV is Effective, Safe & Environmentally Friendly

With chemical disinfection, the effluent is exposed to chlorine gas (or liquid chlorine) in large tanks to ensure sufficient contact time to kill microorganisms. However, in some jurisdictions regulations place stringent limits on chlorine levels in the final effluent to minimize disinfection by-products being discharged into receiving water. In those cases, an additional chemical process called dechlorination is required to remove residual chlorine, ultimately adding more complexity and cost to the disinfection process.

Alternatively, UV provides an effective, safe and environmentally friendly way to disinfect wastewater. It has significant benefits compared to chlorine and has been proven effective in thousands of installations globally. Furthermore, UV is not affected by temperature or pH of the effluent and does not create disinfection by-products. 

More About Upgrading a UV System

  • By upgrading to a new TrojanUV system for their wastewater treatment plant, the Honouliuli Water Recycling Facility in Hawaii will see significant energy savings, as power consumption will be reduced by up to 75%. Read the case study
  • In order to improve the treatment performance and ensure that it would eventually have the treatment capacity to meet future population growth equivalent of up to 225,000, Swansea WwTW was in need of an equipment upgrade. Read the case study
  • Wayne Lem (TrojanUV Market Manager) discusses the benefits associated with upgrading an older UV system and Frank Cassisi (Director of Wastewater Operations for the Borough of Hollidaysburg, PA) talks about his recent upgrade project and offers advice to other wastewater treatment plant operators. Read the article
ECT Knowledge Sharing at International Workshop in China Wed, 1 Nov 2017 12:00:00 EST
Representatives from municipal drinking water plants, government agencies, academia from universities in the province of Shandong, and water treatment technology companies were in attendance to hear representatives from TrojanUV present on the application, science, and implementation of UV-AOP.

TrojanUV representatives taking part in panel discussion at the second international workshop for drinking water UV-AOP (Ultraviolet – Advanced Oxidation Process) treatment in Jinan, China.
Trojan Scientist Alan Royce (leftmost on panel) in at International Workshop for Drinking Water UV-AOP in Jinan, China.

The conference sparked many discussions and questions about the advantages and benefits of Environmental Contaminant Treatment (ECT), and why it is so important to drinking water treatment.

Here are some of the highlights from the Conference

What is ECT?

ECT is a term used to describe an advanced water treatment process that focuses on targeting the removal of chemical compounds which can pose significant health risks or diminish aesthetic water quality and therefore compromise the overall integrity of a water source.

Why is ECT so important in drinking water treatment? What experience does Trojan have?

The treatment of drinking water is regulated globally and drinking water treatment is heavily monitored to ensure biological contaminants including bacteria, protozoa and viruses do not pose risks to public health. The removal of chemical contaminants generally requires treatment methods that are more advanced than those established for biological contaminant treatment.

However, increasing global population is driving demand for quality drinking water. With population growth, more and more, cities are forced to rely on water sources that are exposed to chemical contamination. Trojan has helped dozens of municipalities destroy chemical compounds or contaminants in their drinking water to provide water that is safe and aesthetically-pleasing.

What is UV-AOP technology?

UV-AOP (Ultraviolet – Advanced Oxidation Process) is the treatment process offered by TrojanUV for ECT. TrojanUV was one of the first to commercialize this process for the treatment of chemical contaminants in water. The process is driven by UV-light which is capable of weakening or breaking the chemical bonds of contaminants, therefore directly destroying many trace chemical contaminants found in water.

This process is referred to as photolysis (photo = light; lysis = disintegration). In addition, UV-light can produce powerful oxidizing agents called hydroxyl radicals when hydrogen peroxide is added to water upstream of a UV system (through photolysis of hydrogen peroxide). These radicals are highly unstable and react with chemical contaminants immediately after they are formed.

What interest is there with UV-AOP for drinking water treatment in China? How does it work?

China extracts a significant amount of its drinking water from surface waters that are prone to algae blooms. When algae die, they are known to release the chemicals 2-methylisoborneol (MIB) and geosmin which can be difficult to treat by traditional drinking water treatment processes.

This results in the earthy and musty tastes and odors in the finished drinking water. Regions of China, specifically the province of Shandong, have serious taste and odor events in their drinking water and the government is funding AOP technology to improve their drinking water quality.

What solutions does Trojan offer for UV-AOP technology?

TrojanUV is the leading supplier of ECT systems for taste and odor removal. Our UV systems utilizing hydrogen peroxide as an oxidant (with the hydrogen peroxide and delivery system sometimes supplied by our own USP Technologies) are capable of removing compounds attributed to the unpleasant taste and odor in drinking waters.

Our vast knowledge of ECT is backed by our scientists who possess the fundamental understanding of the science behind contaminant treatment and are increasing their knowledge through further research in this area.

Further Reading

Ask an ECT Expert

Have a question about environmental contaminants, our TrojanUVSwift™ECT or TrojanUVPhox™? Want to discuss a project or application? Email our ECT Manager at ect(at)trojanuv(dot)com