CASE STUDIES AND WHITE PAPERS

Ohio Water Plant Finds Effective Alternative To Chlorine Gas

For many years, Huber Heights, OH, searched for an effective and affordable way to eliminate gaseous chlorine (Cl2) use at its 4.46 MGD Needmore Road Water Treatment Plant. An innovative dry calcium hypochlorite makeup and delivery system now provides a safer disinfection method for operators and the community.

  • Top 10 Considerations When Converting To On-Site Hypochlorite
    Top 10 Considerations When Converting To On-Site Hypochlorite

    Transporting pure salt - the raw material needed to generate sodium hypochlorite onsite – is more cost effective, stable, and safer, than transporting and storing bulk sodium hypochlorite, or gaseous/liquid chlorine cylinders from local chemical suppliers. The conversion to on-site hypochlorite generation can be achieved by adhering to these design guidelines.

  • 4-Log Virus Inactivation With UV Treatment
    4-Log Virus Inactivation With UV Treatment

    The Hall Road Well Station — located in Abington, Pennsylvania — is designed to extract and treat 1.5 million gallons per day (MGD) of water from the Piedmont and Blue Ridge crystalline-rock aquifers. It is part of a network of groundwater extraction wells owned and operated by Aqua-America Pennsylvania (Aqua PA). Aqua PA determined that UV technology was the best approach for meeting the Pennsylvania Department of Environmental Protection regulations for 4-log virus treatment of groundwater. This case study will show you why they chose the TrojanUVSwift™SC.

  • On-Site Chlorine Generation Replaces Conventional Chlorine Gas Feed System In Scottsdale AZ
    On-Site Chlorine Generation Replaces Conventional Chlorine Gas Feed System In Scottsdale AZ

    The city of Scottsdale, Arizona, a community of more than 200,000 residents was historically totally dependent on groundwater resources.  By the mid 1980’s, the city began putting together a multi-faceted water resource program to provide the community with a long-term sustainable water supply.

  • UV Eliminates Cryptosporidium Issues In The Heartland
    UV Eliminates Cryptosporidium Issues In The Heartland

    The City of Moline is now adding validated UV systems to provide an additional barrier for the filtered water, which will improve water quality and ensure that none of the chlorine tolerant organisms such as Cryptosporidium is present. The City of Moline is located in the heart of the Midwest, tucked between the banks of the Mississippi and Rock River in Rock Island.  Moline is one of four cities that make up the Quad Cities that include Rock Island, Illinois and Bettendorf and Davenport Iowa.

  • Arsenic Removed From Drinking Water With Iron Oxide Adsorption Treatment
    Arsenic Removed From Drinking Water With Iron Oxide Adsorption Treatment

    When high levels of arsenic were found in the drinking water in the community of Alto Lampa outside of Santiago de Chile, municipal water provider Aguas Adinas faced a predicament. AdEdge Water Technologies was contacted to design a treatment approach. This case study describes how iron oxide adsorption helped Alto Lampa reduce arsenic levels in treated water to non-detectable concentrations.

  • Drinking Water Disinfection: Tianjin, China (Case Study)
    Drinking Water Disinfection: Tianjin, China (Case Study)

    Favorable reviews of UV technology in wastewater applications influenced Tianjin Economic Development Area (TEDA) Water Supply General Company to investigate the potential of using UV for drinking water applications at one of its water treatment plants. With no previous UV installations for drinking water disinfection in the country, TEDA's process of selecting a UV manufacturer was stringent. We are honored that they chose us and our TrojanUVSwift™ system.

  • The UV Uprising: How UV Disinfection Will Claw Its Way To Prominence
    The UV Uprising: How UV Disinfection Will Claw Its Way To Prominence

    Chlorination in all of its forms — gas, liquid, or solid — has been the primary way for treatment plants to disinfect the treated wastewater. The treatment plants that use gas chlorination must face federal regulatory oversight in the form of a Risk Management Program (RMP). Liquid chlorine plants trade in the regulatory oversight for a more expensive and less effective product. While chlorine in its solid form is good for small treatment facilities known as package plants (named for their mobility). However, ultraviolet (UV) technology is rapidly altering the landscape of disinfection throughout the industry. By Sheldon Primus, MPA, COSS

  • GAC Solution For Ohio's Most Challenging Water
    GAC Solution For Ohio's Most Challenging Water

    Over the course of many years the City of Celina, Ohio has been challenged with supplying drinking water to the 11,647 residents of the city and the East Jefferson District.

  • Water Plant Applies Colorimetric Chlorine Analyzer To Accurately Measure Proper Chloramination
    Water Plant Applies Colorimetric Chlorine Analyzer To Accurately Measure Proper Chloramination

    The North Shore Water Commission located in Glendale Wisconsin is a conventional water treatment facility that receives its influent from Lake Michigan. At the intake, chemical treatment is applied for mussel control and the water is pumped to the treatment plant 1 mile away. By Kevin Forsman

  • Guaynabo WTP In Puerto Rico Saves Thousands With UV 254 Monitoring Package
    Guaynabo WTP In Puerto Rico Saves Thousands With UV 254 Monitoring Package

    Dealing with fluctuating water sources is not an easy task for plant operators. Seasonal variation, heavy rain fall or accidental contamination events change the raw water quality, requiring immediate attention. This is a familiar scenario for Facility Manager, Nancy Ma. Cáceres Acosta at the Los Filtros Water Treatment Plant in Puerto Rico. She has been producing highquality water for 256,000 local residents, receiving surface water from the Guaynabo and Bayamon River

  • The Role Of UV In Solving Next-Generation Water Challenges
    The Role Of UV In Solving Next-Generation Water Challenges

    The global market for water treatment technologies is growing and becoming increasingly important as the quality and quantity of freshwater sources are stressed and the link between fresh water sources and wastewater — returned to the environment — is more and more obvious. By Rick VanSant, President & CEO, UV Pure Technologies, Inc.

  • Theoretical Operation Of High-Efficiency Ultraviolet Water Treatment Chamber
    Theoretical Operation Of High-Efficiency Ultraviolet Water Treatment Chamber

    The NeoTech Aqua ReFleX™ water purification chambers are the most efficient and compact units available today. They require an order of magnitude less energy and less than 25% of the system volume to achieve the same or better purification result as competing chambers. This is the first in a series of three white papers explaining the benefits of these systems. By J. R. Cooper, Ph.D, NeoTech Aqua Solutions, Inc.

Bring On The Bacteria: Conventional Treatment Methods Not Enough To Produce Safe Drinking Water

Around the world there are guidelines and regulations regarding the quality of drinking water distributed by water treatment plants. These guidelines/regulations are sometimes national, such as U.S. regulations and Canadian guidelines.

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CONTAMINANT REMOVAL PRODUCTS

WEDECO LBX e Series UV System

WEDECO LBX e Series UV System

WEDECO LBX e UV system is a compact closed vessel UV reactor for drinking water, wastewater, water reuse, and WEDEO’s MiPRO Advanced Oxidation Processes (AOP) applications. Equipped with WEDECO’s low-pressure, high output amalgam ECORAY® UV lamps and OptiDose sensor based control, the LBXe provides the highest operating efficiency with low life-cycle costs. Additionally, the LBXe reactor’s extensive validation envelope ensures disinfection performance over a range of UV transmittance (UVT) values, flowrates, and a variety of target organisms.

Ozone Destruction System

Ozone Destruction System

NeoTech Aqua Solutions’ line of 254 nm wavelength low-pressure lamps effectively destroys residual ozone and a member of our technical staff will professionally size your UV system. 

ReFleX™ Efficiency

ReFleX™ Efficiency

For both disinfection and TOC-reduction applications, NeoTech Aqua Solutions’ patented ReFleX™ UV chamber technology represents the state-of-the-art in high-efficiency UV systems by reflecting over 99% of the UV we generate back into the water.

Resinex Ion Exchange Resins

Resinex Ion Exchange Resins

In many water treatment and food purification applications, activated carbon is used in conjunction with ion exchange resins to provide an end-product of the desired quality and purity.

NeoTech D428™

NeoTech D428™

The NeoTech D428™ is specially designed to disinfect water and is an essential component in advanced oxidation processes.

NeoTech D238™

NeoTech D238™

The NeoTech D238™ is specially designed to disinfect water and is an essential component in advanced oxidation processes.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

The Reward Of Risk: New Tech Pays Off

The Reward Of Risk: New Tech Pays Off

The engineering community can sometimes be weary of trying anything other than the technologies they are already accustomed to, says Rich Cavagnaro of Adedge, a purification technology company with a focus on nitrates and radionuclides.

Understanding The Benefits Of Chlorination

Understanding The Benefits Of Chlorination

Fletcher Roche, Product Manager at Evoqua Water Technologies, explains why chlorine gas is a safe and cost-effective disinfection solution.

The Pros And Cons Of Ion Exchange Versus Membrane Technology

The Pros And Cons Of Ion Exchange Versus Membrane Technology

Frank Caligiuri, Sales Manager for Hungerford & Terry, discusses the merits of ion exchange versus membrane technology with a focus on the constituents being removed

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.

Can’t Keep Up? Partner With A Manufacturers’ Rep To Sustain Growth

Can’t Keep Up? Partner With A Manufacturers’ Rep To Sustain Growth

Rich Cavagnaro, President of AdEdge Water Technologies, and Tom Carmody, President of TC Tech LLC, share how their companies have partnered to successfully grow business in the advanced water treatment technology space.

Chromium-6 Treatment Becomes Key Issue Following California Regulations

Chromium-6 Treatment Becomes Key Issue Following California Regulations

With water scarcity driving populations to new or previously abandoned water sources out West, Chromium-6 is becoming a significant treatment issue. 

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CONTAMINANT REMOVAL VIDEOS

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.

Leopold® FilterWorx® Overview

Leopold® FilterWorx® Overview

FilterWorx® is a complete water filtration system engineered to improve efficiency and reliability. Ideally suited for applications such as potable drinking water treatment, tertiary wastewater treatment, nutrient removal in water or wastewater, pretreatment prior to low-pressure membrane systems, and RO membrane desalination pretreatment, FilterWorx performance filters feature a flat-bottom flume, fiberglass backwash water troughs, engineered media, three types of underdrains, and media retainers in two different sizes. In addition, FilterWorx control systems provide the longest filtration run cycles to reduce energy consumption and wastewater generation, thereby lowering operating costs.

Water Purification Solutions From Severn Trent Services

Water Purification Solutions From Severn Trent Services

Severn Trent Services offers a broad range of water treatment technologies concentrated around disinfection and filtration. In this video, Sales Director John Dyson highlights the new Anchor-Rite® design for the TETRA® LP Block™, dual parallel lateral underdrains that are popular with plant owners as a retrofit or for new filter underdrain applications. Find out how the company is currently working with customers to identify needs and plan their product portfolio accordingly.

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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).