CASE STUDIES AND WHITE PAPERS

MIOX Achieves Increased Efficacy Against Biofilm And Legionella Vs. Common Biocides

Comparative disinfection studies using 3 oxidizing biocides and 3 commonly used non-oxidizing biocides against Legionella pneumophilia.

  • Solving A Taste and Odor Problem Step By Step (Article)
    Solving A Taste and Odor Problem Step By Step (Article)

    The City of Alliance Ohio’s water system has experienced annual Taste and Odor (T&O) events since the mid 1950’s, when the first of two reservoirs, Deer Creek Reservoir, was placed into service. Nutrient contaminants, in particular phosphorous, in the watershed accumulate in the reservoirs causing algal blooms. By Terry Keep of TrojanUV, Said Abou Abdallah of Arcadis, and Dr. Dean Reynolds, Department of Water Treatment City of Alliance, Ohio

  • Low Pressure, High Output 800‐Watt Amalgam System Performing Efficiently
    Low Pressure, High Output 800‐Watt Amalgam System Performing Efficiently

    The Trail Lakes Hatchery is owned by the State of Alaska and is managed under contract by the Cook Inlet Aquaculture Association (CIAA) on behalf of the Alaska Department of Fish and Game. CIAA was established in 1976 to provide the Cook Inlet drainage with an organized and reliable salmon stock. The Trail Lakes facility is permitted to introduce sockeye and coho salmon at several sites throughout the Cook Inlet watershed.

  • Municipality Removes Biofilm, Improves Water Quality, Lowers Dosage With MIOX
    Municipality Removes Biofilm, Improves Water Quality, Lowers Dosage With MIOX

    Looking to reduce potential disinfection byproducts issues that new and difficult regulations were requiring, a Tennessee municipality began investigating alternative water treatment disinfection methods in an effort to reduce the potential liability (RMP) involved with using and storing gas chlorine. Within months of switching to a mix of oxidants (MOS), a difference was noted in the systems residual, residual was no longer dead spotting in low flow areas, and much higher residual was noted in areas that had been difficult to maintain At the end of the first year of operation the municipality had also documented a reduction in their disinfection byproducts formations, specifically both TTHMs and HAAs, which were both reduced by 50% in direct comparison with the quarterly results from the previous year.

  • Guaynabo WTP In Puerto Rico Saves Thousands With UV 254 Monitoring Package
    Guaynabo WTP In Puerto Rico Saves Thousands With UV 254 Monitoring Package

    Dealing with fluctuating water sources is not an easy task for plant operators. Seasonal variation, heavy rain fall or accidental contamination events change the raw water quality, requiring immediate attention. This is a familiar scenario for Facility Manager, Nancy Ma. Cáceres Acosta at the Los Filtros Water Treatment Plant in Puerto Rico. She has been producing highquality water for 256,000 local residents, receiving surface water from the Guaynabo and Bayamon River

  • Hydro-Guard® Improves Water Quality And Saves Man-Hours For Central Texas Vacation Community
    Hydro-Guard® Improves Water Quality And Saves Man-Hours For Central Texas Vacation Community

    The user population of the Horseshoe Bay Water Distribution System does not reach its peak until summer and the resultant levels of peak and low usage vary widely.

  • The Nationwide Impact Of California’s Hexavalent Chromium Regulations
    The Nationwide Impact Of California’s Hexavalent Chromium Regulations

    California recently became the first U.S. state to regulate hexavalent chromium in drinking water. Will others follow suit?

  • Ozone Disinfection System Provides Second Stage Treatment For Water Treatment Plant
    Ozone Disinfection System Provides Second Stage Treatment For Water Treatment Plant

    Tampa Bay Water’s state-of-the-art surface water treatment plant has provided high-quality drinking water to the Tampa Bay region.

  • Targeted Algal Management Plan To Address Taste And Odor Problem
    Targeted Algal Management Plan To Address Taste And Odor Problem

    Lake John Hay is located six miles northwest of Salem, Indiana and is used for drinking water and tournament and recreational fishing. With an average depth of 14-15 feet, it is ideal for algae and plant growth. The persistent, recurring algae blooms was causing taste and odor problems, which led to frequent complaints.

  • Ozone Disinfection System Lowers Turbidity, Boosts Filter Run Times, And Eliminates Taste And Odor Issues
    Ozone Disinfection System Lowers Turbidity, Boosts Filter Run Times, And Eliminates Taste And Odor Issues

    By 2025 Salt Lake City expects to gain additional 100,000 residents, and the nearby city of Sandy expects to gain another 30,000.

  • <em>Microcystin</em> Concentrations Following Treatments Of Harmful Algal Blooms
    Microcystin Concentrations Following Treatments Of Harmful Algal Blooms

    Microcystin producing cyanobacteria blooms were sampled and tested from an Illinois reservoir, an Ohio reservoir and a Michigan lake.

  • 4-Log Virus Inactivation - Abington, Pennsylvania (Case Study)
    4-Log Virus Inactivation - Abington, Pennsylvania (Case Study)

    The Hall Road Well Station — located in Abington, Pennsylvania — is designed to extract and treat 1.5 million gallons per day (MGD) of water from the Piedmont and Blue Ridge crystalline-rock aquifers. It is part of a network of groundwater extraction wells owned and operated by Aqua-America Pennsylvania (Aqua PA). Aqua PA determined that UV technology was the best approach for meeting the Pennsylvania Department of Environmental Protection regulations for 4-log virus treatment of groundwater. This case study will show you why they chose the TrojanUVSwift™SC.

  • Multi-Barrier Disinfection Strategy - New York City (Case Study)
    Multi-Barrier Disinfection Strategy - New York City (Case Study)

    New York City is home to more than 8 million people, making it the most populous city in the United States. The majority of New York's drinking water is supplied by the Catskill/Delaware watershed, located approximately 100 miles outside the city. Historically, NYC has not filtered the water from this system, nor did they require any additional barriers to microbial contaminants due to the pristine nature of the watershed.

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.

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CONTAMINANT REMOVAL PRODUCTS

Complete Solutions For Mine Water Balance

Complete Solutions For Mine Water Balance

Choose Xylem pumps, treatment equipment, and analytical instruments for use at every stage in mining. Our solutions are engineered for severe applications and can be counted on for reliable performance that helps you manage water in sustainable ways.

Disinfection Series

Disinfection Series

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

Emerging Pollutants:  The Role Of Activated Carbons

Emerging Pollutants: The Role Of Activated Carbons

The presence of active pharmaceutical ingredients, radio-opaque substances and endocrine disrupting chemicals in raw water sources is a relatively new emerging issue in relation to drinking water quality. However, the influence of pollutants on health and general well-being is becoming apparent with the incidence of carcinoma increasing and fertility rates being affected. A solution for the efficient removal of these substances from water use by production sites is required.

NeoTech D322™

NeoTech D322™

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

ReFleX™ Efficiency

ReFleX™ Efficiency

For both disinfection and TOC-reduction applications, NeoTech Aqua Solutions’ patented ReFleX™ UV chamber technology represents the state-of-the-art in high-efficiency UV systems by reflecting over 99% of the UV we generate back into the water.

TrojanUVTelos&trade; &mdash; Drinking Water Disinfection System

TrojanUVTelos™ — Drinking Water Disinfection System

TrojanUVTelos™ (télōs) is the latest evolution of UV for small communities and was created to address the needs of the energy- and maintenance-conscious buyer. This advanced system utilizes TrojanUV Solo Lamp™ Technology and TrojanUV Flow Integration (FIN™) hydraulic optimization technology, which leads to low power consumption, uniform UV dose delivery and a low lamp count. With these features, the advantages of TrojanUVTelos are clear — lower life cycle costs, easy maintenance and reduced environmental impact.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

Combating Chromium The Smart Way

Combating Chromium The Smart Way

Ever since Erin Brockovich discovered hexavalent chromium in California’s water supply in the early ‘90s, the contaminant has been on the minds of treatment plant operators everywhere.

Key Trends In Water And Wastewater Treatment: Non-Chemical Disinfection, Remote Management, And Urbanization

Key Trends In Water And Wastewater Treatment: Non-Chemical Disinfection, Remote Management, And Urbanization

Rick VanSant, President and CEO of UV Pure Technologies, explains some of the key trends currently shaping the water and wastewater market, including non-chemical disinfection, remote management, and urbanization.

Advanced Water Treatment Solutions To Solve The Modern Treatment Puzzle

Advanced Water Treatment Solutions To Solve The Modern Treatment Puzzle

Advanced treatment solutions continue to evolve as 1,4-Dioxin, N-Nitrosodimethylamine (NDMA) removal and Pharmaceuticals and Personal Care Products (PPCPs) appear on the regulatory horizon. Many times, advanced treatment requires combinations of different products in the treatment process.

Carbon Company Highlights Ion Exchange

Carbon Company Highlights Ion Exchange

Activated carbon and ion exchange can be called two sides of the same coin. Where activated carbon purifies water by removing organic contaminants through an adsorption process, ion exchange removes contaminants under the surface via electrical charge.

Lighting The Way: Next Steps For UV Disinfection

Lighting The Way: Next Steps For UV Disinfection

With more than 8,500 municipal installations over 40 years, TrojanUV is well-versed in UV disinfection. What’s next for the technology? Adam Festger, TrojanUV’s market manager for drinking water and environmental contaminant treatment, reveals new trends and products to Water Online Radio’s Todd and Kelly.

TrojanUV + Water Reuse (Audio)

TrojanUV + Water Reuse (Audio)

Jennifer Muller, municipal marketing director for TrojanUV, sat down with Water Online Radio for this live interview from the show floor at WEFTEC 2011 in Los Angeles. Muller talked about Trojan’s ultraviolet (UV) disinfection technology and how it lends itself to the important issues of water reuse and sustainability.

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CONTAMINANT REMOVAL VIDEOS

Severn Trent Services Expands Capabilities For Disinfection, Nutrient Removal, And Filtration

Severn Trent Services Expands Capabilities For Disinfection, Nutrient Removal, And Filtration

Water Online’s Ron Grunsby interviews John Dyson of Severn Trent Services to uncover the latest innovations and developments from the company, including the product line on display at WEFTEC 2012.

MIOX Flowback Water Disinfection For Recycle

MIOX Flowback Water Disinfection For Recycle

Watch as MIOX’s patented mixed oxidant technology dramatically changes, and treats hydraulic fracturing flowback water on-the-fly. MIOX’s water treatment solution has a small footprint, and utilizes only salt and electricity which helps provide low treatment costs.

biottta Biotreatment Pilot Case Study

biottta Biotreatment Pilot Case Study

The Lincoln Pipestone Rural Water District in Minnesota had a high level of both nitrate and manganese in the groundwater. Piloting of the biottta treatment solution proved to be successful.

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ABOUT

The removal of contaminants from public drinking water systems in the US is mandated by the Environmental Protection Agency’s (EPA) National Primary Drinking Water Regulations. These are legally enforceable standards that protect public health by limiting the levels of contaminants in drinking water. Similar regulations are managed by agencies worldwide to protect their citizens from drinking water contamination.

There are a plethora of drinking water contaminant removal technologies that public and private water systems use to comply with the EPA’s drinking water regulations. These include reverse osmosis, membrane, nanofiltration, ultrafiltration, chlorine disinfection, UV disinfection and Ozone-based disinfection practices.

The EPA’s list of drinking water contaminants is organized into six types of contaminants and lists each contaminant along with its Maximum Contaminant Level (MCL), some of the potential health effects from long-term exposure above the MCL and the probable source of the drinking water contaminant.

The six types of contaminants are microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals and radionuclides.

Examples of microbiological, organic contaminants are Cryptosporidium and Giardia lamblia. Both of these microorganic pathogens are found in human or animal fecal waste and cause gastrointestinal illness, such as diarrhea and vomiting.

A common disinfectant used in municipal drinking water treatment to disinfect microorganisms is chlorine. The EPA’s primary drinking water regulations require drinking water treatment plants to maintain a maximum disinfectant residual level (MDRL) for chlorine of 4.0 milligrams per liter (mg/L). Some of the detrimental health effects of chlorine above the MCL are eye irritation and stomach discomfort.

Similarly, byproducts from the chlorine-based disinfection methods used by public water systems to remove contaminants can be contaminants in their own right if not removed from the drinking water prior to it being released into the distribution system. Examples of disinfection byproducts include bromate, chlorite and total trihalomethanes (TTHMs). Not removed from drinking water, these disinfection byproducts can increase risk of cancer and cause central nervous system issues.

Chemical contamination of drinking water can be caused by inorganic chemicals such as arsenic, barium lead, mercury and cadmium or organic chemicals such as benzene, dichloroethane and other carbon-derived compounds. These chemicals get into source water through a variety of natural and industrial processes. Arsenic for example is present in source water through the erosion of natural deposits.  Many of the chemical contaminants are derived from industrial wastewater such as discharges from petroleum refineries, steel or pulp mills or the corrosion of asbestos cement water mains or galvanized pipes.

Radium and uranium are examples of radionuclides. Radium 226 and Radium 228 must be removed to a level of 5 picocuries/liter (PCI/L) and Uranium to a level of 30 micrograms/liter (30 ug/L).