CASE STUDIES AND WHITE PAPERS

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?

  • Closed Vessel UV Successful In El Paso County, TX
    Closed Vessel UV Successful In El Paso County, TX

    Horizon City is located in El Paso County, the most western county in Texas. The city is home to a rapidly growing population of 19,000 people, up from 5,000 during the 2000 Census. The City takes its name from the real estate development company, the Horizon City Corporation. With less than 9 inches of annual rainfall, water conservancy is a routine way of life in this part of the State.

  • Using Ozone To Remove Micropollutants From Wastewater
    Using Ozone To Remove Micropollutants From Wastewater

    Micropollutants in our wastewater are a growing problem and so is the concern for the long-term hazard to the ecosystem.

  • Key Considerations For Biological Drinking Water Treatment
    Key Considerations For Biological Drinking Water Treatment

    Interested in converting to biological drinking water treatment? Here’s what you need to know.

  • Biological Drinking Water Treatment: Microbiological Considerations For The Operation And Control Of Biofilters
    Biological Drinking Water Treatment: Microbiological Considerations For The Operation And Control Of Biofilters

    It’s well known the beneficial role that particular groups of microorganisms have in the food and beverage industry. Similarly are the beneficial aspects that either engineered or non-engineered biological treatment systems have in the drinking water production process.

  • Known For “Healing Waters,” Pagosa Springs Restores Its Potable Water System With Help From SolarBee® Mixers
    Known For “Healing Waters,” Pagosa Springs Restores Its Potable Water System With Help From SolarBee® Mixers

    Located in the high desert plateau of southwestern Colorado, Pagosa Springs is famous for its geothermal hot springs, which draw visitors worldwide to soak in the mineral-rich water. The Utes called the sulfur springs “Pah-gosah,” meaning “healing waters.” You might say the town’s potable water system is healed now as well.

  • The UV Uprising: How UV Disinfection Will Claw Its Way To Prominence
    The UV Uprising: How UV Disinfection Will Claw Its Way To Prominence

    Chlorination in all of its forms — gas, liquid, or solid — has been the primary way for treatment plants to disinfect the treated wastewater. The treatment plants that use gas chlorination must face federal regulatory oversight in the form of a Risk Management Program (RMP). Liquid chlorine plants trade in the regulatory oversight for a more expensive and less effective product. While chlorine in its solid form is good for small treatment facilities known as package plants (named for their mobility). However, ultraviolet (UV) technology is rapidly altering the landscape of disinfection throughout the industry.

  • 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.

  • Ion Exchange: A Viable Water Treatment Alternative To Membranes
    Ion Exchange: A Viable Water Treatment Alternative To Membranes

    Five decades ago, ion exchange using charged resins was one of two processes used in the water industry for water treatment.

  • 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.

  • Biological Drinking Water Treatment: Challenges And Potential
    Biological Drinking Water Treatment: Challenges And Potential

    The continuous struggle to remediate contaminated natural waters, and to reduce the impact of emerging challenges on the supply of safe potable water are key drivers for research and development in the global water industry today.

  • The Role Of UV In Solving Next-Generation Water Challenges
    The Role Of UV In Solving Next-Generation Water Challenges

    The global market for water treatment technologies is growing and becoming increasingly important as the quality and quantity of freshwater sources are stressed and the link between fresh water sources and wastewater — returned to the environment — is more and more obvious. By Rick VanSant, President & CEO, UV Pure Technologies, Inc.

  • Surface Water Treatment & LT2 Compliance - Surprise, Arizona (Case Study)
    Surface Water Treatment & LT2 Compliance - Surprise, Arizona (Case Study)

    The White Tanks Regional Water Treatment Facility (White Tanks) is located in Surprise, Arizona, and treats surface water from the Colorado River that is delivered by a 336 mile (540 kilometer) man-made canal.

Municipal Drinking Water Facility Installs UV System To Deactivate Cryptosporidium And Giardia

The City of Berea public water system, provides service to approximately 20,000 people, using surface water drawn from the East Branch of the Rocky River; however, supplies can also be drawn from nearby Coe Lake and Baldwin Creek as needed.

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CONTAMINANT REMOVAL PRODUCTS

ETS-UV For Drinking Water Disinfection

ETS-UV For Drinking Water Disinfection

The ETS range of drinking water UV systems are modeled using CFD and FEA emulation tools and have been independently validated to demonstrate performance under a variety of operating conditions.

TrojanUVTelos™ — 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.

WEDECO LBX e Series UV System

WEDECO LBX e Series UV System

WEDECO LBX e UV system is a compact closed vessel UV reactor for drinking water, wastewater, water reuse, and WEDEO’s MiPRO Advanced Oxidation Processes (AOP) applications. Equipped with WEDECO’s low-pressure, high output amalgam ECORAY® UV lamps and OptiDose sensor based control, the LBXe provides the highest operating efficiency with low life-cycle costs. Additionally, the LBXe reactor’s extensive validation envelope ensures disinfection performance over a range of UV transmittance (UVT) values, flowrates, and a variety of target organisms.

TOC Reduction

TOC Reduction

NeoTech Aqua Solutions provides the most efficient and cost-effective UV systems for destroying Total Organic Carbons (TOC’s) in water.  Whether your destroying NDMA, 1,4-dioxane, TCE, MTBE, urea, endocrine disruptors or other organics, only NeoTech Aqua provides ultraviolet TOC reduction with a treatment chamber optimized for low pressure mercury lamps.  As a result, NeoTech Aqua’s UV systems achieve a three times greater TOC reduction per kilowatt compared to standard UV systems, reducing our clients’ costs and energy consumption. In addition to efficiently generating ample 185 nm UV for TOC reduction, NeoTech Aqua’s TOC reduction systems also generate significant levels of 254 nm UV which serve as a powerful disinfectant, providing you both TOC-free and organism-free product water.

MEMCOR® Ultrafiltration Systems

MEMCOR® Ultrafiltration Systems

Our membranes and membrane systems reflect the advancements that have been made in the industry over the past three decades.

Patriot™ Series

Patriot™ Series

NeoTech Aqua Solutions’ Patriot Series utilizes D438 chamber technology in a stacked and manifolded configuration to support larger flow volumes. By integrating NeoTech Aqua’s patented ReFleX chamber technology, Patriot systems provide the most efficient and versatile UV water treatment equipment available for large volume users. Further, when configured as an n+1 design, the NeoTech Aqua’s Patriot systems meet most redundancy requirements.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

Coconut Shell Activated Carbon

Coconut Shell Activated Carbon

Jim Knepper, Vice President of Sales for Jacobi Carbons, discusses the growth of the Company and the advantages of coconut shell activated carbon in complying with the EPA’s disinfection byproduct phase II ruling.

Understanding The Benefits Of Chlorination

Understanding The Benefits Of Chlorination

Fletcher Roche, Product Manager at Evoqua Water Technologies, explains why chlorine gas is a safe and cost-effective disinfection solution.

UV Examined (Audio)

UV Examined (Audio)

Adam Festger, Market Manager, Drinking Water and Environmental Contaminant Treatment for TrojanUV, highlights some of advances in UV technology over the last few years including UV groundwater treatment, UV chemical contamination treatment and UV lamp efficiency.

A True Lifesaver: Grundfos Provides Key Element For High-Quality Water

A True Lifesaver: Grundfos Provides Key Element For High-Quality Water

The facilities run by the University of Iowa Hospitals & Clinics have strict standards for water quality, as staff must protect the very sensitive equipment and patients under their care. Safeguarding against such threats as Legionella, there is no room for treatment system downtime. As maintenance issues with the network's existing water treatment systems became ever-increasing, a new technology was sought.

The Reward Of Risk: New Tech Pays Off

The Reward Of Risk: New Tech Pays Off

The engineering community can sometimes be wary of trying anything other than the technologies they are already accustomed to, says Rich Cavagnaro of Adedge, a purification technology company with a focus on nitrates and radionuclides.

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.

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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.

Leopold® FilterWorx® Overview

Leopold® FilterWorx® Overview

FilterWorx® is a complete water filtration system engineered to improve efficiency and reliability. Ideally suited for applications such as potable drinking water treatment, tertiary wastewater treatment, nutrient removal in water or wastewater, pretreatment prior to low-pressure membrane systems, and RO membrane desalination pretreatment, FilterWorx performance filters feature a flat-bottom flume, fiberglass backwash water troughs, engineered media, three types of underdrains, and media retainers in two different sizes. In addition, FilterWorx control systems provide the longest filtration run cycles to reduce energy consumption and wastewater generation, thereby lowering operating costs.

Salsnes Delivers Fully Automated, Compact Filter Technology

Jorn Eliassen of Salsnes Filter, now part of TrojanUV, provides a detailed description of the company’s flagship product, which is presented as a low-cost option to a conventional primary clarifier. The system offers separation, thickening, and dewatering in one unit, features a small footprint, and is suitable for a variety of applications.

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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).