CASE STUDIES AND WHITE PAPERS

Hexavalent Chromium Treatment Using Strong Base Anion Exchange With An Innovation In Brine Management
Hexavalent Chromium Treatment Using Strong Base Anion Exchange With An Innovation In Brine Management

Researchers examine the feasibility of treating hexavalent chromium — the carcinogen made famous by the movie “Erin Brockovich” — with strong base anion exchange (SBA-IX).

 Improving The Quality Of Tertiary Effluent For Indirect Potable Reuse With Geographic Constraints
Improving The Quality Of Tertiary Effluent For Indirect Potable Reuse With Geographic Constraints

The Mazzei Sidestream Venturi Injection – Pipeline Flash Reactor System provides a feasible alternative for dissolution of ozone at the Clark County Water Reclamation District (CCWRD) in Las Vegas, because it allowed for flexibility in basin design to meet geographic site constraints.

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CONTAMINANT REMOVAL PRODUCTS

NoMonia Biotreatment Solutions NoMonia Biotreatment Solutions

NoMonia is a dual-stage engineered biotreatment process that relies on naturally occurring bacteria. Typically, the amount of ammonia that can be oxidized during the natural nitrification process is limited by oxygen availability and its saturation level in the water.

GDT Mixing & Contacting Systems GDT Mixing & Contacting Systems

The GDT™ Process starts with the creation of ozone from an Ozone Generator. The ozone is then drawn into a Mazzei®Venturi Injector which provides dynamic mixing (a Back Pressure Control Valve adjusts injector outlet pressure optimizing ozone mass transfer in the system). Then mixing and contacting is enhanced in a Flash Reactor™. From there the two-phase flow travels to the Degas Separator (DS) & Relief Valve for additional mixing and entrained gas removal. And finally, the MTM Mixing Nozzles force dissolved ozone flow into the untreated water in the pipeline or basin for thorough mixing.

Ozone System For Advanced Water Treatment And Disinfection Ozone System For Advanced Water Treatment And Disinfection

With 1,200 installations worldwide, De Nora Ozone offers a wide range of ozone systems, from small compact units to turnkey plants. Ozone is used for the treatment of municipal drinking water and wastewater; micropollutants; industrial wastewater and process water; advanced oxidation; pools and spas; and biological sludge reduction. Using the strongest natural oxidants, on-site ozone generation does not create a residual biological sub-product, offers quick reaction time, and requires no chemical compounds. De Nora Ozone systems maximize ozone concentration while minimizing energy requirements, working closely with the customer to a provide a tailor-made solution for individual needs. De Nora Ozone has the expertise to ensure you get the most effective technical solution through pilot plants, testing and scale units.

Injection Skids Injection Skids

Mazzei injection systems are designed using the Mazzei’s patented technologies to obtain the most efficient mixing and contacting of air, oxygen, ozone or chemicals into a water stream.

Aqua ElectrOzone™ Ozone Generation System Aqua ElectrOzone™ Ozone Generation System

Ozone treatment for water and wastewater has been utilized successfully for several decades and continues to be a viable disinfection solution for both municipal and industrial plants, worldwide.

SORB 33® ARS Series Arsenic Removal Systems – Pre-engineered For Faster Delivery And Simple Installation SORB 33® ARS Series Arsenic Removal Systems – Pre-engineered For Faster Delivery And Simple Installation

De Nora’s SORB 33® arsenic removal adsorber systems use our proven and effective arsenic removal media that removes arsenic to non-detect levels. Systems are pre-engineered for faster delivery times and simple installation.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

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.

LA Story: Advanced Treatment, Reuse Saves Scarce Water Resources LA Story: Advanced Treatment, Reuse Saves Scarce Water Resources

Officials in Los Angeles have grown tired of importing water, which is an expensive, unsustainable response to the region's persistent drought. The smarter solution, they concluded, is to reuse local resources through advanced purification and aquifer recharge. But how do you ensure safety and efficiency before committing to a treatment technology? A unique piloting tool from Xylem’s Wedeco brand offered the city clear answers.

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.

Drumming Up Chemical Injection Drumming Up Chemical Injection

The operating ranges for chemical injection need to be large because of the variability of flow in many treatment operations. As Bill McDowell, Vice President of Operations with Blue White Industries explains in this Water Talk interview, “You might be down to as low as 5 or 10 milliliters a minute and then one hour later; you might need to pump 15 gallons a minute out of the same pump and through the same sensor.”

Ozone: An Emerging Star For Disinfection Ozone: An Emerging Star For Disinfection

There are many places around the country where water shortage is a big issue. Water is the most precious resource we have, and in light of the shortage, people have started trying to investigate creative ways of ‘what’s my next water resource,’ Chris Milligan, vice president, director of engineering with BlueInGreen, told Water Online Radio in an interview.

Will Peracetic Acid Replace Chlorine? Will Peracetic Acid Replace Chlorine?

Chlorine has long been a water treatment staple, but it’s not without its complications. As an alternative, some treatment facilities have been turning to peracetic acid (PAA) and enjoying several key advantages.

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CONTAMINANT REMOVAL VIDEOS

WEDECO Duron UV Disinfection System Overview Video WEDECO Duron UV Disinfection System Overview Video

WEDECO Duron is a new, open channel UV disinfection system for clean, safe treated wastewater that minimizes energy and footprint. Designed for mid-size to large open channel systems, the Duron eliminates the need for chemical based disinfection while simultaneously reducing electricity costs and the amount of space required. This video explains the overall function of the product.

TrojanUV at ACE10 - The Launch of Solo Lamp™ Technology (Video) TrojanUV at ACE10 - The Launch of Solo Lamp™ Technology (Video)

Under the big red umbrella, Jennifer Muller of TrojanUV discusses the company’s new solo lamp technology and the TrojanUV Torrent, a large-scale drinking water disinfection system being introduced at the show.

Flowback Water Recycling Flowback Water Recycling

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.

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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).