WASTEWATER DISINFECTION WHITE PAPERS & CASE STUDIES

Water Utility Turns To State-Of-The-Art UV Technology To Help Address Drought

The 2013 year was the driest in recorded history with many areas of the San Joaquin Valley reporting groundwater levels more than 100 feet below previous historical lows. 

  • Replacement Vacuum Feeders For Hypo Treatment End Heavy Feeder Maintenance Burden At WWTP
    Replacement Vacuum Feeders For Hypo Treatment End Heavy Feeder Maintenance Burden At WWTP

    The instrumentation supervisor for the City of Baltimore, MD’s 150-MGD Back River wastewater treatment plant (WWTP) reports that replacement of problematic vacuum feeders with more advanced vacuum feed units has ended heavy maintenance burdens associated with sodium hypochlorite (hypo) treatment of plant effluent. By Cliff Lebowitz

  • Disinfection Performance Testing Of High-Efficiency Ultraviolet Water Treatment Chamber
    Disinfection Performance Testing Of High-Efficiency Ultraviolet Water Treatment Chamber

    This is the second in a series of three white papers describing the design and performance of the NeoTech Aqua ReFlex™ treatment chamber. The first describes in detail the theoretical basis for the very high efficiency demonstrated by the chamber. The third paper describes how this chamber design leads to some highly desirable operational advantages beyond just energy ad cost reduction. By J. R. Cooper, Ph. D. and Gwynne Cavender, NeoTech Aqua Solutions, Inc.

  • Theoretical Operation Of High-Efficiency Ultraviolet Water Treatment Chamber
    Theoretical Operation Of High-Efficiency Ultraviolet Water Treatment Chamber

    The NeoTech Aqua ReFleX™ water purification chambers are the most efficient and compact units available today. They require an order of magnitude less energy and less than 25% of the system volume to achieve the same or better purification result as competing chambers. This is the first in a series of three white papers explaining the benefits of these systems. By J. R. Cooper, Ph.D, NeoTech Aqua Solutions, Inc.

  • Three Channel's A Charm: MD WWTP Chooses UV
    Three Channel's A Charm: MD WWTP Chooses UV

    The Seneca Wastewater Treatment Plant (WWTP) receives wastewater from the greater Washington, DC area. Heightened security and concerns over the hazards of using chlorine gas had the Washington Suburban Sanitary Commission (WSSC) reconsidering their wastewater disinfection process equipment.

  • Removal of Metaldehyde & Environmental Contaminant Treatment - Lincoln, United Kingdom (Case Study)
    Removal of Metaldehyde & Environmental Contaminant Treatment - Lincoln, United Kingdom (Case Study)

    Anglian Water (Anglian) is one of the largest suppliers of drinking water and wastewater services in the United Kingdom. As an alternative to ozone, Anglian decided to install a TrojanUVTorrent™ECT UV-oxidation system, as part of a multi-barrier approach, to ensure it produced a potable water supply that matched the high standards required by its regulators and customers.

  • Not All UV Lamps Are Created Equal
    Not All UV Lamps Are Created Equal

    When the Summerville, GA, WWTP was looking to convert from chemical disinfection to UV, staff made the common mistake of purchasing low-price aftermarket lamps to keep costs down. Within eight months, the lamps in the UV system failed to meet expectations for permit requirements, and they had to gain approval for emergency procurement of WEDECO’S ECORAY® lamps as replacements. Today, the plant achieves the required disinfection with a significant reduction in energy use.

  • Genuine TrojanUV3000Plus Lamps Vs. Non-Genuine Lamps: A Side-By-Side Comparison (Case Study)
    Genuine TrojanUV3000Plus Lamps Vs. Non-Genuine Lamps: A Side-By-Side Comparison (Case Study)

    Perform Lamp Output And Aging Study On Trojan UV3000™ Lamps And Non-Genuine G64T5 Low Pressure UV Lamps

  • Top 10 Considerations When Converting To On-Site Hypochlorite
    Top 10 Considerations When Converting To On-Site Hypochlorite

    Transporting pure salt - the raw material needed to generate sodium hypochlorite onsite – is more cost effective, stable, and safer, than transporting and storing bulk sodium hypochlorite, or gaseous/liquid chlorine cylinders from local chemical suppliers. The conversion to on-site hypochlorite generation can be achieved by adhering to these design guidelines.

  • Conversion To UV Disinfection: A Natural Wastewater Treatment Alternative
    Conversion To UV Disinfection: A Natural Wastewater Treatment Alternative

    The city of Auburn, AL has two wastewater treatment facilities – the Northside Water Pollution Control Facility and the H.C. Morgan Water Pollution Control Facility. In 2012, the H.C. Morgan facility was upgraded, and disinfection was converted from chlorine to UV. This case study will provide you with details about the selection process, why our TrojanUVSigna™ was chosen, and how we helped simplified the conversion from chlorine.

  • Size Your Ozone System In 5 Minutes Or Less
    Size Your Ozone System In 5 Minutes Or Less

    The most common questions about using ozone for the treatment of industrial wastewater relate to system sizing and pricing. Here are five quick rules of thumb to get a ‘ballpark size’ for your next ozone project. 

Municipal Wastewater Reuse – The Challenges Ahead

Water resources are becoming more constrained. Obtaining surface or groundwater withdrawal permits is becoming increasing difficult. By Randy Turner, Technical Director, Swan Analytical USA

More White Papers & Case Studies

WASTEWATER DISINFECTION PRODUCTS

ETS-UV for Wastewater Treatment

ETS-UV for Wastewater Treatment

UV has made tremendous gains in the last 25 years, and is now recognized as a primary method of disinfecting wastewater. All of the typical wastewater organisms are rendered nonviable by a correct dose of UV light; ETS maintains comprehensive databases of organisms and the amount of UV required to achieve 1, 2, 3 or higher log removals to meet and exceed a discharge permit.

RIO ZUNI On-Site Chemical Generator

RIO ZUNI On-Site Chemical Generator

The MIOX RIO Zuni is a compact, easy to install and operate on-site chemical generator designed for minimal maintenance and ultimate simplicity. Similar to the thousands of larger MIOX installations around the world, this small-scale chemical generator can be retrofitted into existing infrastructures. Just load with salt and let the RIO Zuni do the dirty work for you!

Disinfection Technologies

Disinfection Technologies

When determining the best water disinfection method, considering the countless design and operational factors can be daunting, but Severn Trent Services makes it easy

Disinfection Series

Disinfection Series

The NeoTech Aqua Disinfection Series is specially designed to disinfect water and is an essential component in advanced oxidation processes.

TrojanUV3000B – Wastewater Disinfection System

TrojanUV3000B – Wastewater Disinfection System

The TrojanUV3000™B is available with a controller that enables flow pacing to maximize operating efficiency and extend lamp life. The system turns UV lamp banks on and off automatically to ensure the required dose is met using the fewest lamps and least electricity. These simple, robust, and operator-friendly systems have demonstrated their effective, reliable performance in thousands of installations around the world.

NeoTech D322™

NeoTech D322™

The NeoTech D322™ is specially designed to disinfect water and is an essential component in advanced oxidation processes.

MicroDynamics® Closed Vessel Microwave UV System

MicroDynamics® Closed Vessel Microwave UV System

The new MicroDynamics® CV02 Closed Vessel Ultraviolet (UV) system is a patented design from Severn Trent Services. The system uses microwave energy to provide consistent strength UV disinfection for a variety of applications.
Wallace & Tiernan® Disinfection

Wallace & Tiernan® Disinfection

Evoqua Water Technologies is the premier provider of total disinfection and chemical dosing solutions. Our extensive portfolio, which includes the trusted Wallace & Tiernan product line, is designed to meet your most rigorous demands in virtually any water application and give you access to both the latest advances and widest range of proven technologies.

More Products

WASTEWATER DISINFECTION PODCASTS

Bio-Augmentation: Adding Bacteria To Wastewater Treatment Plants

Bio-Augmentation: Adding Bacteria To Wastewater Treatment Plants

Novozymes is the world’s largest industrial biotech company. The largest segment of the company deals with enzyme products, and they innovate products and develop applications in a variety of industries including first and second generation biofuels, bio-agriculture, detergents, and wastewater applications.

Ozone: An Emerging Star For Disinfection

Ozone: An Emerging Star For Disinfection

There are many places around the country where water shortage is a big issue. Water is the most precious resource we have, and in light of the shortage, people have started trying to investigate creative ways of ‘what’s my next water resource,’ Chris Milligan, vice president, director of engineering with BlueInGreen, told Water Online Radio in an interview.

UV Disinfection With LEDs

UV Disinfection With LEDs

UV LEDs offer the chemical free disinfection of traditional UV while avoiding mercury lamps. In certain applications where customers are concerned about the potential hazards of mercury contamination in the water from a broken lamp, UV LEDs are interesting because they don’t contain any mercury content at all.

Keeping Costs Down By Focusing On A Smaller Footprint

Keeping Costs Down By Focusing On A Smaller Footprint

Focused on creating solutions with a smaller environmental footprint for its customers, Severn Trent Services recently enhanced one of its gas regulators from handling 100 pounds of chlorine per day to handling 250 pounds per day for the same price.

How Do You Disinfect? Electrolysis Offers Alternative To Chlorine

How Do You Disinfect? Electrolysis Offers Alternative To Chlorine

Though the company has only been around about a decade, MIOX is making a notable impression on the water and wastewater treatment industry.

The Evolution Of Low-Energy UV Disinfection

The Evolution Of Low-Energy UV Disinfection

Conventional ultraviolet (UV) disinfection is a great, but often expensive, solution for the destruction of pathogens in drinking water. All those lamps and power emissions add up. But what if you could perform the same job with 1/10 of the power used by conventional systems?

More Wastewater Disinfection Podcasts
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WASTEWATER DISINFECTION VIDEOS

Biological Denitrification Evolves

Biological Denitrification Evolves

As regulation regarding nutrients evolves, so does the technology to remove them.

Oxelia: An Ozone-Enhanced Biologically Active Filtration System

Oxelia: An Ozone-Enhanced Biologically Active Filtration System

Xylem’s Leopold Oxelia is designed for municipal wastewater treatment. The ozone-enhanced biologically active filtration system and multi-barrier solution combines ozone, filtration and analytical instrumentation to deliver optimal wastewater treatment for water reuse and discharge into sensitive waters.

Compact Solids Separation And UV Disinfection Technologies Showcased At WEFTEC

Compact Solids Separation And UV Disinfection Technologies Showcased At WEFTEC

Salsnes Filter offers an alternative to traditional primary clarification for solids separation by using a rotating belt filter to remove suspended solids to high levels but also thickening and dewatering the solids in one compact footprint.

RIO Zuni Installation & Start Up Video

RIO Zuni Installation & Start Up Video

The RIO Zuni produces Mixed Oxidant Solution (MOS) through a patented electrolysis process by MIOX using salt, water and electricity. MOS is a non-hazardous chemical that is proven more effective at microorganism inactivation.

WEDECO PRO<sub>3</sub>MIX Overview

WEDECO PRO3MIX Overview

The PRO3MIX bromate control system is an intelligent ozone-based advanced oxidation process (AOP) introduction and reaction system enabling ozone treatment in a compact and intelligent design to mitigate bromate formation even in cases of high level bromide in source water. This short animated overview walks the reader through the various disinfection points of the process.

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WASTEWATER DISINFECTION NEWS

ABOUT WASTEWATER DISINFECTION

 

Wastewater disinfection takes place after primary, secondary and sometimes tertiary wastewater treatment. It is typically a final step to remove organisms from the treated water before the effluent is released back into the water system. Disinfection prevents the spread of waterborne diseases by reducing microbes and bacterial numbers to a regulated level.

A variety of physical and chemical methods are used to disinfect wastewater prior to it being released into natural waterways. Historically, the chemical agent of choice for municipal wastewater treatment has been chlorine, due to its disinfecting properties and low cost. However, the rising cost of chlorine and concerns that low chlorine concentrations can still be toxic to fish and other wildlife, has given rise to more physical methods of wastewater disinfection being adopted such as ozonation or ultraviolet (UV) light.  

The use of ozone as a disinfection agent has the added benefit of increasing the dissolved oxygen content of the treated wastewater. However, because the ozone has to be generated, ozonation can require prohibitive up-front capital expenditure compared to traditional chlorination. UV disinfection has been growing in popularity as a wastewater disinfection method, in large part because of the life-cycle economics of the equipment and the fact that, like ozone, there is no toxic residual.