CASE STUDIES AND WHITE PAPERS

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.

Granular Activated Carbon As A Barrier Against Chemical Spills

Granular activated carbon can provide an effective barrier defense against chemical spills into our drinking water sources. Read this white paper describing how to put GAC to work defending your source waters.

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CONTAMINANT REMOVAL PRODUCTS

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.

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.

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 CU-4 X™

NeoTech CU-4 X™

The NeoTech CU4-X™ UV Water Treatment Control Interface is a remote and compact master controller capable of managing up to four NeoTech ultraviolet water treatment chambers independently and simultaneously.

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.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

Challenges For Water Utilities Spur Technology Upgrades

Challenges For Water Utilities Spur Technology Upgrades

Lee Odell, Water Treatment Global Technology Lead at CH2M HILL, discusses some of the current challenges that water utilities are facing and how CH2M HILL is well-poised to address them.

Radium And Iron Removed From Radioactive Water To Solve Water Scarcity Crisis In Texas

Radium And Iron Removed From Radioactive Water To Solve Water Scarcity Crisis In Texas

Jim Jackson, National Sales Manager for Mazzei, discusses a San Angelo, TX project removing radium and iron from a radioactive water source to solve the city’s water scarcity problem.

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.

Let’s Talk Adenovirus With TrojanUV (Audio)

Let’s Talk Adenovirus With TrojanUV (Audio)

Adam Festger, Drinking Water & Environmental Contaminant Treatment market manager for TrojanUV, sat down with Water Online Radio to discuss UV trends and technologies. Hear all about TrojanUV’s “Let’s Talk Adenovirus” campaign, as well as the company’s growing installation base and recent product developments.

Safer Disinfection With Peracetic Acid

Safer Disinfection With Peracetic Acid

John Maziuk, Technical Development Manager at Solvay Chemicals, discusses the benefits of peracetic acid over other wastewater and stormwater disinfection methods, including no harmful byproducts, a simpler process, and a longer shelf life.

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.

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CONTAMINANT REMOVAL VIDEOS

How To Install A UV Lamp

How To Install A UV Lamp

This video features a step-by-step demonstration of how to change out a used UV lamp and install a new one.

Open Channel Ultraviolet Disinfection From WEDECO

Open Channel Ultraviolet Disinfection From WEDECO

Water Online’s Bill King talks to Jay Jordan of WEDECO about the Duron UV system, which Jordan describes as an efficient, green solution that requires little maintenance. Suitable for secondary and tertiary wastewater applications, the Duron features a compact design, intelligent dose control, and overall efficiency benefits further described in the video.

An Introduction To NeoTech Aqua Solutions

An Introduction To NeoTech Aqua Solutions

Whether you’re managing municipal waters, working with cooling towers, or producing clean water, NeoTech Aqua Solutions offers disinfection, TOC reduction, and ozone destruction products that can be easily sized for your requirements.  Real-time dosimetry units provide exact dosage measurements, and a minimum number of lamps allow for halting of water flow without powering the unit down.

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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).