CASE STUDIES AND WHITE PAPERS

Two Innovative Technologies Ensure DBP/TOC Regulatory Compliance
Two Innovative Technologies Ensure DBP/TOC Regulatory Compliance

The city of Fort Lupton a growing Front Range community located along the South Platte River in Colorado, began operation of a new 5 MGD (18.93 MLD) membrane filtration system in 1997.

Treatment of Groundwater Contaminated With 1,4-Dioxane - Tucson, Arizona (Case Study)
Treatment of Groundwater Contaminated With 1,4-Dioxane - Tucson, Arizona (Case Study)

The TrojanUVPhox™ installation at Tucson's Advanced Oxidation Process Water Treatment Facility treats 1,4-dioxane and produces water that is blended and then treated at the neighboring Tucson Airport Remediation Project facility. This purified water is supplied to nearly 50,000 end users.

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CONTAMINANT REMOVAL PRODUCTS

UVC Sensors UVC Sensors

Sensors work together with ballasts and lamps in a control loop.

SureSafe™ Filter Cartridges SureSafe™ Filter Cartridges

SureSafe™ Filter Cartridges will inhibit the growth of Legionella on your filter cartridges. Silver has been used to help sanitize liquids for more than 4,000 years. Permanent Silver Zeolite fibers are used to manufacture HARMSCO® SureSafe™ Filtration Media which inhibits the growth of biofilms on and in the filtration media.

Capital Controls® Series CL500, CL1000 And CL1000B Residual Analyzers Capital Controls® Series CL500, CL1000 And CL1000B Residual Analyzers

The Capital Controls® CL500 residual analyzer is designed to continuously monitor free and total chlorine. The analyzer is auto ranging to 20 mg/l and operates using the amperometric method of measurement. The amperometric method is EPA approved for on-line chlorine residual monitoring in drinking water.

ClorTec® On-Site Sodium Hypochlorite Generation Systems T Series ClorTec® On-Site Sodium Hypochlorite Generation Systems T Series

ClorTec T systems easily control sodium hypochlorite production and provide a powerful disinfection method for any application. T systems meet requirements for 2 to 36 lb/day (0.9 to 16 kg/day) chlorine equivalent. Applications include potable water, wastewater, odor and corrosion control, cooling towers, oxidation and swimming pool disinfection.

ClorTec® Inspection And Maintenance Program ClorTec® Inspection And Maintenance Program

De Nora Water Technologies has developed a comprehensive preventative inspection and maintenance contract program for our ClorTec® on-site sodium hypochlorite generation system.

Trough-Guard® Media Baffle Trough-Guard® Media Baffle

The Leopold Trough-Guard media baffle is a stainless steel assembly that is fastened onto both sides of wash-water troughs to help prevent significant media loss during concurrent air/water filter backwash.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

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.

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.

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.”

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 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?

A Sustainable Solution For Treating Contaminants A Sustainable Solution For Treating Contaminants

There are a number of regulations in drinking water centered around emerging contaminants. Hexavalent chromium is one that you’ll see on the national marketplace.

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CONTAMINANT REMOVAL VIDEOS

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.

TrojanUVTelos™ Drinking Water UV Disinfection System (Video) TrojanUVTelos™ Drinking Water UV Disinfection System (Video)

Adam Festger discusses how, with TrojanUVTelos, we have simplified UV disinfection to help small communities overcome drinking water challenges.

Fluoride Saturator and Feed System Video Fluoride Saturator and Feed System Video

The IMS Fluoride Feed System is designed with separate saturator and solution tanks to ensure complete saturation, high reliability, low maintenance, and ease of use. Systems are sized to meet customer requirements.

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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).