CASE STUDIES AND WHITE PAPERS

TotalCare Condition Audit Results In Energy Savings Of 80% And Improved Controls
TotalCare Condition Audit Results In Energy Savings Of 80% And Improved Controls

Xylem TotalCare Condition Audit, an inspection and recommendation program that helps plant operators find ways to lower maintenance costs by identifying inefficiencies in the operation of water and wastewater equipment, was elected to audit the American Canyon Wastewater Treatment Plant (WWTP) in California.

San Diego Plant Cuts THM Levels In Half
San Diego Plant Cuts THM Levels In Half

The 34 MGD Otay Water Treatment Plant in San Diego, California serves a population of approximately 200,000. It is a conventional treatment plant that uses coagulation, flocculation, sedimentation, filtration and disinfection. The plant receives raw water from two different sources — imported water from the Colorado River and runoff water from three local reservoirs.

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CONTAMINANT REMOVAL PRODUCTS

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-Jet® SS-PW Surface Aerator For THM Removal Aqua-Jet® SS-PW Surface Aerator For THM Removal

The Aqua-Jet® SS-PW surface mechanical aerator, manufactured by Aqua-Aerobic Systems is certified to NSF/ANSI 61 by UL for use in potable water applications. These units can be utilized for THM stripping applications or circulation in potable water treatment systems and reservoirs with a minimum volume of 100,000 gallons.

Chemical Feed Systems Chemical Feed Systems

IMS Chemical Feed Systems are pre-assembled, fully-functional chemical delivery systems for water treatment applications. These compact, user-friendly chemical skids include local storage tanks, full secondary containment, dosing pumps, instrumentation and controls. Systems are piped and wired at the factory for easy and quick hook-up.

Aqueous Ammonia Feed Systems Aqueous Ammonia Feed Systems

The IMS packaged Aqueous Ammonia Feed Systems include a heavy duty pressure rated aqueous ammonia storage tank, integral ammonia fume scrubber, peristaltic dosing pump, instrumentation and controls in a fully contained, pre-assembled skid.

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.

UV Package Plant UV Package Plant

Calgon Carbon UV Technologies is pleased to introduce the C3500D/PS Packaged System for UV Wastewater Disinfection. This product uniquely addresses the needs of smaller communities with effluent flows of less than 2.6 million gallons a day.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

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 Value Of Wastewater: Closed Vessel UV Disinfection For Water Reuse The Value Of Wastewater: Closed Vessel UV Disinfection For Water Reuse

Jon McClean, President of Engineered Treatment Systems (ETS), explains how UV disinfection of wastewater provides an effective and sustainable solution to growing water shortages.

UVT-LED Sheds Light On UV Disinfection UVT-LED Sheds Light On UV Disinfection

Learn why measuring UV transmittance is so important to efficient disinfection, and how LED helps get you there.

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.

'Hot' Water Treatment: Trending Technologies For Utilities 'Hot' Water Treatment: Trending Technologies For Utilities

What are the key innovations that are actually being implemented, here and now, and creating a paradigm shift in water and wastewater treatment? Jess Brown, VP and director of R&D for Carollo Engineers, tackles the question.

A 'Banner Year' For Ballasted Treatment A 'Banner Year' For Ballasted Treatment

It may not be mentioned as Ryan Seacrest begins the countdown on New Year’s Eve, but a few treatment plants scattered across the country may recall 2015 as the year of ballasted treatment.

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CONTAMINANT REMOVAL VIDEOS

Sherbrooke Water Filtration Plant Video Testimonial Sherbrooke Water Filtration Plant Video Testimonial

This video features the lead operator for the ozone and filtration systems at the Sherbrooke Water Filtration Plant in Quebec, Canada, Mr. Yves DelaFontaine.  As you’ll see in the video, Yves has high remarks for Pinnacle’s modular capability, built in redundancy and ease of installation, which took place in 2014.  

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.

De Nora Brings New Focus To Water Treatment De Nora Brings New Focus To Water Treatment

Following the acquisition of Severn Trent Services’ Water Purification Group, Water Online caught up with John Dyson, Commercialization Manager for the newly-branded De Nora Water Technologies, to understand what the change means for the water and wastewater industry. Dyson discusses how the new organization is enhancing the company’s product lines including the newly redesigned ClorTec on-site sodium hypochlorite generation system.

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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).