WASTEWATER DISINFECTION WHITE PAPERS & CASE STUDIES

Pure Oxygen Injection Into A Pipeline
Pure Oxygen Injection Into A Pipeline

The Hagerstown Wastewater Treatment Plant in Maryland incorporated several plant modifications, one of which was the conversion of their disinfection process from the use of ozone to UV.

  • UV Disinfection Upgrade For Water Reuse - EWA Beach, Hawaii (Case Study)
    UV Disinfection Upgrade For Water Reuse - EWA Beach, Hawaii (Case Study)

    The Honouliuli Water Recycling Facility (WRF) includes filtration and UV disinfection to treat to Class R-1 reuse standards for various uses, including irrigation. In order to maintain high-level reuse, simplify maintenance, and reduce operation costs, the Honolulu Board of Water Supply decided to replace its 15-year-old TrojanUV4000™ with a TrojanUVSigna™.  With the high cost of power in Hawaii, this system upgrade will provide significant power savings (estimated at 75%) and will enable equipment payback in less than 2.5 years.

  • Florida County Partners With The WateReuse Association To Find The Best Use For Reclaimed Drinking Water
    Florida County Partners With The WateReuse Association To Find The Best Use For Reclaimed Drinking Water

    In 2016 Hillsborough County Public Utilities, a forward thinking organization, initiated the first direct potable reuse pilot project in Florida. In its efforts to utilize 100 percent of its reclaimed water, the progressive utility created a successful program to effectively suspend surface water discharges. Read the full case study to learn more.

  • Safe, Energy Efficient Disinfection For 45 MGD Combined Sewer WWTP Improves Water Quality
    Safe, Energy Efficient Disinfection For 45 MGD Combined Sewer WWTP Improves Water Quality

    The Hudson River, in the Capital District of Albany, NY, is a popular recreational area for boating, swimming and fishing. Unfortunately combined sewer overflows following storm events and snow melt from sewer systems dating back to the 1800’s were causing increased fecal coliform counts which in turn resulted in health alerts and limited access to the river. After considering several alternatives, the Albany County Sewer District selected a Wedeco Duron 60i2-2.5X4, with high power Ecoray 600W lamps, for their disinfection system.

  • ETS-UV™ Project Profile WWTP Dundee, Oregon
    ETS-UV™ Project Profile WWTP Dundee, Oregon

    The City of Dundee is a growing community with a strong economy boasting three wineries within the city limits and several others in the surrounding Willamette River Valley. The City’s existing WWTP was nearing capacity, and the limited discharge to the Williamette River would not adequately support Dundee’s planned growth.

  • The World’s Largest Drinking Water Plant Using Ozone Serves 1.6 Million Customers
    The World’s Largest Drinking Water Plant Using Ozone Serves 1.6 Million Customers

    Facing new limits on acceptable levels of DBPs in the drinking water, as well as age-old complaints about the taste of the water during the summer algal bloom, the North Texas Municipal Water District turned to ozone disinfection as a possible alternative able to address both concerns.

  • Indirect Potable Reuse With UV-Oxidation - Big Spring, Texas (Case Study)
    Indirect Potable Reuse With UV-Oxidation - Big Spring, Texas (Case Study)

    In an effort to reduce reliance on dwindling surface and groundwater supplies in Texas, the Colorado River Municipal Water District (CRMWD) constructed a new Raw Water Production Facility (RWPF) in Big Spring. Big Spring is a 27,000-member community located in West Texas approximately 300 miles west of Dallas. This RWPF treats secondary wastewater to a standard that allows it to be re-introduced directly into the raw water supply for the water treatment plants of Big Spring, Odessa, and other communities in the region.

  • Emergency Chlorine Scrubber Restoration Saves County Of Maui Over $100,000
    Emergency Chlorine Scrubber Restoration Saves County Of Maui Over $100,000

    Read the full case study to learn how the County of Maui Department of Water and IMS determined that spent caustic used at the local wastewater treatment plant and the acid wash solution generated during the cleaning process could be neutralized on-site and disposed through the local wastewater treatment system.

  • Emergency Chlorine Scrubber Refurbished After Inspection Reveals Serious Problems
    Emergency Chlorine Scrubber Refurbished After Inspection Reveals Serious Problems

    In December 2006, Integrity Municipal Services (IMS) was contacted by the City of California City Plant Manager Greg Fielding to perform an inspection of their RJ-2000® emergency chlorine vapor scrubber system.

  • Removing 12” Of Caustic Build-up Returns Chlorine Scrubber To Optimal Performance for Oglala Sioux Rural Water
    Removing 12” Of Caustic Build-up Returns Chlorine Scrubber To Optimal Performance for Oglala Sioux Rural Water

    The MNI Wiconi Water Treatment Plant in Ft. Pierre, SD was built for the Oglala Sioux Rural Water Supply System between 1997 and 2002 with a grant provided by the U.S. Department of Interior.

  • Chlorine Scrubber Installation Protects World-Class Water Treatment Plants In The Phillipines
    Chlorine Scrubber Installation Protects World-Class Water Treatment Plants In The Phillipines

    In 2014, bids were solicited to design, supply, install, and commission two Emergency Chlorine Scrubber Systems at the La Mesa Treatment Plants 1 and 2 in Quezon City, Philippines.

Restoration Of Chlorine Scrubbers At EMWD Protects Plant Workers And Neighbors
Restoration Of Chlorine Scrubbers At EMWD Protects Plant Workers And Neighbors

In October 2014, Eastern Municipal Water District (EMWD) selected IMS to clean, inspect, and restore four Bulk Emergency Chlorine Vapor Scrubber Systems.

More White Papers & Case Studies

WASTEWATER DISINFECTION PRODUCTS

High Speed CSO Filtration System High Speed CSO Filtration System

As measures of improving the combined sewer system, this high rate filtration system filters the rain water, which flowed directly to the river before, by using our original filter media. This new treatment system can be installed in the existed facilities and supplies stable filtrations for rainfall flow fluctuation.

Wallace & Tiernan® Chlorine Gas Feed Systems Wallace & Tiernan® Chlorine Gas Feed Systems

About 100 years ago, Charles F. Wallace and Martin F. Tiernan installed the first chlorinator in New York, and since, chlorine gas has been the predominant chemical for the disinfection of water.

TrojanUV3000™B — Wastewater Disinfection System TrojanUV3000™B — 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.

Brands You Know. Performance You Trust Brands You Know. Performance You Trust

While the Evoqua name is new, the brands you know and the performance you trust are not. Evoqua continues a 100-year tradition of helping consulting engineers and municipalities respond to market needs and evolving water standards for new plants, upgrades and retrofits.

SMART Digital Dosing SMART Digital Dosing

SMART Digital dosing pumps respond to the most recent chemistry developments in water treatment, wastewater recycling, and disinfection with energy saving technology and high dosing accuracy.

Ozone Disinfection: 499AOZ Dissolved Ozone Sensor Ozone Disinfection: 499AOZ Dissolved Ozone Sensor

The 499AOZ sensor is intended for the continuous determination of dissolved ozone. The primary application is ozonation basins in municipal water filter plants. Ozone is also used as a disinfectant in bottling and food processing plants.

TrojanUVSigna™ — Wastewater Disinfection System TrojanUVSigna™ — Wastewater Disinfection System

Chlorine is not the only viable disinfection option for mid- and large-scale applications. With the TrojanUVSigna™, operators and engineers can confidently choose UV and benefit from its inherent safety features, cost-saving advantages and disinfection performance.

GDT Skids GDT Skids

In the GDT™ Contacting Process, ozone gas is created from air or pure oxygen with an ozone generator. Ozone gas is then aspirated via the high efficiency Mazzei® Venturi Injectors providing dynamic mixing and mass transfer. The Back Pressure Control Valve adjusts injector outlet pressure to optimize ozone mass transfer. Dissolution is enhanced in a Flash Reactor™, which is sized for each application on the basis of feed gas concentration, operating pressure, reaction rates and desired transfer efficiency.

More Products

WASTEWATER DISINFECTION PODCASTS

Polymer Activation And Onsite Hypochlorite Generation Polymer Activation And Onsite Hypochlorite Generation

Polymer activation through proper hydration of the polymer particle is critical in water clarification or sludge dewatering applications. According to Jeff Rhodes, Vice President of Commercial Development for UGSI Solutions, “the key is to have a high energy zone at the moment of initial welding, when the polymer and the water come together.”

PAA And UV Pair Up To Improve Disinfection Performance PAA And UV Pair Up To Improve Disinfection Performance

Peracetic acid (PAA)-based disinfection is growing in the US, both as a standalone disinfection method and in conjunction with other applications such as UV. Water Online Radio sat down with John Maziuk, Technical Development Manager with Solvay Chemicals to understand why.

The Benefits Of Closed-Channel UV Over Open-Channel Disinfection The Benefits Of Closed-Channel UV Over Open-Channel Disinfection

The era of dumping waste into rivers is almost over. So says Jon McClean, Chief Technical Officer with ETS-UV, an Evoqua brand. McClean who has been working in UV water treatment for over 30 years recently sat down with Water Online Radio to discuss the growth of water reuse and specifically UV’s role in water reclamation.

Making Aftermarket Service And Support Work For Water And Wastewater Treatment Plants Making Aftermarket Service And Support Work For Water And Wastewater Treatment Plants

As municipalities look to make their water and wastewater treatment equipment run longer with fewer operational staff on payroll to maintain the equipment, having a reliable aftermarket parts and service provider becomes essential.

UVT-LED Sheds Light On UV Disinfection UVT-LED Sheds Light On UV Disinfection

Learn why measuring UV transmittance is so important to efficient disinfection, and how LED helps get you there.

An Alternative To Chlorine Disinfection An Alternative To Chlorine Disinfection

Chlorine has been used to disinfect water and wastewater for more than a hundred years, and while chorine has been critical to ensure public safety, it does have some drawbacks. There is a risk of highly toxic emissions, and it also reacts with organic matter in water and wastewater and forms harmful disinfection byproducts.

More Wastewater Disinfection Podcasts

WASTEWATER DISINFECTION VIDEOS

Expanding Submerged Plant Operating Window Through Double-Ended Filtration Expanding Submerged Plant Operating Window Through Double-Ended Filtration

The Memcor® CSII double-ended filtration system features innovative double-ended filtration that uses up to 20 percent less backwash aeration energy. The proven module design reduces footprint by up to 30 percent or utilizes new space and increases capacity up to 30 percent.

Watch CoMag® System Deliver Rapid and Reliable Floc Settling Watch CoMag® System Deliver Rapid and Reliable Floc Settling

The CoMag® system from Evoqua improves chemical flocculation treatment in wastewater and drinking water applications by using magnetite (an iron ore) to ballast chemical floc, resulting in rapid, reliable and enhanced settling and clarification. The CoMag system settles floc up to 30 times faster than conventional treatments, which reduces plant investment costs by enabling greater treatment capacity in smaller or existing tanks.

The Groundwater Replenishment System In Orange County, California (Video) The Groundwater Replenishment System In Orange County, California (Video)

The Groundwater Replenishment System (GWRS) in Orange County, California is the largest indirect potable reuse project of its kind in the world. Our TrojanUVPhox™ plays an important role in the facility's treatment train.

The Application Of UV In Reuse (Video) The Application Of UV In Reuse (Video)

Water reuse is being adopted in the US as industry and communities recognize the need for a steady and sustainable water source for their future. In this Water Online video, Adam Festger, Market Manager for Trojan Technologies, discusses the Orange County groundwater replenishment system and other recent water reuse projects that Trojan UV has been involved in.

De Nora Invests In Core Water Treatment Technologies De Nora Invests In Core Water Treatment Technologies

Gary Lohse, Regional Sales Manager for De Nora Water Technologies, provides Bill King with a tour of the Company’s WEFTEC 16 booth and explains some of the product enhancements and initiatives that the new company has made since acquiring Severn Trent’s water treatment business last year.

More Videos

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.