CASE STUDIES AND WHITE PAPERS

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.

Water Treatment Plant Solves Taste And Odor Problems And High Toxin Levels
Water Treatment Plant Solves Taste And Odor Problems And High Toxin Levels

Phoenix is one of the country’s fastest growing metropolitan areas and has one of the most arid desert climates. Population growth coupled with increasingly stringent water regulations pushed the city to proactively address future water supply concerns. The decision was made to build the Lake Pleasant Water Treatment Plant (WTP) and include oxidation and disinfection treatment barriers.

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CONTAMINANT REMOVAL PRODUCTS

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.

BALPURE® Ballast Water Treatment BALPURE® Ballast Water Treatment

The Type-Approved BALPURE® electrolytic disinfection ballast water treatment system is the preferred method of ballast water treatment for LNG/LPG carriers, crude / product / chemical tankers and bulk carriers.

SORB 33® Arsenic Removal System SORB 33® Arsenic Removal System

The SORB 33® arsenic removal system from De Nora Water Technologies is economical, simple to operate and requires virtually no labor. In this simple pump-and-treat adsorption system, the contaminated water passes through a robust granular ferric oxide media, Bayoxide® E33. As water passes through the media, arsenic is adsorbed and removed to a level below the 5 micrograms per liter (μg/l). The SORB 33 system requires no cleaning, no regeneration and no complex, laborintensive steps.

ClorTec® Aftermarket Solutions And Services ClorTec® Aftermarket Solutions And Services

De Nora Water Technologies can help you to optimise your electrochlorination system operation to deliver consistent life long performance.

Capital Controls® Gas Feeder Series WM4000 Capital Controls® Gas Feeder Series WM4000

Capital Controls Series WM4000 gas feeders are wall cabinet mounted vacuum operated and designed to conveniently house a combination of gas feed equipment. The fibreglass cabinets enclose the gas flow control components.

Bayoxide® E33 Arsenic Removal Media Bayoxide® E33 Arsenic Removal Media

The simple and economical SORB 33® arsenic removal technology uses Bayoxide® E33 granular ferric oxide media, developed by LANXESS and produced for De Nora Water Technologies specifically for groundwater source drinking water adsorption. The Bayoxide media is long-lasting and once exhausted can be sent to a nonhazardous landfill for disposal.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

True BLEU: Underdrain Concept And Design By Tonka Water True BLEU: Underdrain Concept And Design By Tonka Water

Rick Mann, VP of sales with Tonka Water, shares details on an underdrain system that can fit into any plant – and is built to last.

Activated Carbon Stays Strong Activated Carbon Stays Strong

Sometimes the old ways are the best. Adsorption using porous carbons was described as early as 1550 B.C. on ancient Egyptian papyrus and the treatment method has remained useful for confronting today’s contamination problems.

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.

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?

Making Aftermarket Service And Support Work For Water And Wastewater Treatment Plants Making Aftermarket Service And Support Work For Water And Wastewater Treatment Plants

As municipalities look to make their water and wastewater treatment equipment run longer with fewer operational staff on payroll to maintain the equipment, having a reliable aftermarket parts and service provider becomes essential.

UV-LED Technology: The Latest In Disinfection UV-LED Technology: The Latest In Disinfection

Dan Shaver, Business Development Manager at Aquionics, talks about the advantages of UV-LED technology for disinfection: low energy requirements, chemical-free and customizable design, and proficiency in solar or battery-powered applications.

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CONTAMINANT REMOVAL VIDEOS

UV Treatment Gains Traction In Reuse Applications (Video) UV Treatment Gains Traction In Reuse Applications (Video)

Fresh off TrojanUV being named manufacturer of the year by the WateReuse Association, Water Online caught up with Jennifer Muller, Vice President of Global Municipal Sales for TrojanUV at this year’s WEFTEC, to understand how ultra violet systems are being applied in the growing movement towards direct and indirect potable water reuse.

Meet The Worlds Most Advanced Ozone Generator Technology Meet The Worlds Most Advanced Ozone Generator Technology

Ozone is one of the strongest and most powerful oxidants available. As an oxidant, ozone is approximately 50% more powerful than chlorine.

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.

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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).