CASE STUDIES AND WHITE PAPERS

Coming Of Age: UV-C LED Technology Update

Sometimes technology innovations come along which cause a paradigm shift in how products are designed.

  • The Nationwide Impact Of California’s Hexavalent Chromium Regulations
    The Nationwide Impact Of California’s Hexavalent Chromium Regulations

    California recently became the first U.S. state to regulate hexavalent chromium in drinking water. Will others follow suit?

  • Arsenic Removal Technologies:  A Review
    Arsenic Removal Technologies: A Review

    Arsenic is a common element in the earth’s crust, natural groundwater, and even the human body.  It is an odorless and tasteless semi-metal (metalloid) that is naturally present in aquifers throughout the U.S. and the world. 

  • UV Disinfection Eliminates Groundwater-Borne Pathogens At Water Utility
    UV Disinfection Eliminates Groundwater-Borne Pathogens At Water Utility

    A study led by the Marshfield Clinic Research Foundation set out to prove the growing evidence 'that our groundwater is fairly heavily contaminated with human pathogenic viruses.'

  • UV Disinfection Produces Highly Purified Water In Silicon Valley
    UV Disinfection Produces Highly Purified Water In Silicon Valley

    With diminished rainfall, a depleted aquifer basin, near-empty recharge ponds, and an earthquake-vulnerable aqueduct system, the Santa Clara Valley Water District (SCVWD) in San Jose, CA, required additional water supplies to maintain regional economic vitality for its growing community.

  • EPA’s Upcoming Regulation On Strontium — What You Need To Know
    EPA’s Upcoming Regulation On Strontium — What You Need To Know

    In October, the U.S. Environmental Protection Agency (EPA) made a preliminary determination to regulate strontium in the nation's drinking water.

  • 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.

  • Known For “Healing Waters,” Pagosa Springs Restores Its Potable Water System With Help From SolarBee® Mixers
    Known For “Healing Waters,” Pagosa Springs Restores Its Potable Water System With Help From SolarBee® Mixers

    Located in the high desert plateau of southwestern Colorado, Pagosa Springs is famous for its geothermal hot springs, which draw visitors worldwide to soak in the mineral-rich water. The Utes called the sulfur springs “Pah-gosah,” meaning “healing waters.” You might say the town’s potable water system is healed now as well.

  • CDOX® Demonstration – Large-Scale Drinking Water Facility
    CDOX® Demonstration – Large-Scale Drinking Water Facility

    This brief memo will provide a snapshot of data and information from BlueInGreen’s most recent CDOX® success at a 120 MGD municipal water treatment plant in the Midwest.

  • Treating Trace Contaminants In Drinking Water - Aurora, Colorado (Case Study)
    Treating Trace Contaminants In Drinking Water - Aurora, Colorado (Case Study)

    Many waterways contain environmental contaminants resulting from agricultural runoff or industrial/municipal wastewater discharge. Possible environmental contaminants include nitrosamines, pesticides, pharmaceuticals, personal care products or other environmental contaminants. To protect residents from these contaminants, the City of Aurora set stringent water treatment goals, and adopted an advanced treatment process at the Aurora Reservoir Water Purification Facility. Find out what role our TrojanUVPhox™ plays in that process.

  • Ozone Disinfection System Provides Treatment In Arizona
    Ozone Disinfection System Provides Treatment In Arizona

    Water is disinfected before it enters the distribution system to ensure that dangerous microbial contaminants are killed.

  • Solving A Taste and Odor Problem Step By Step (Article)
    Solving A Taste and Odor Problem Step By Step (Article)

    The City of Alliance Ohio’s water system has experienced annual Taste and Odor (T&O) events since the mid 1950’s, when the first of two reservoirs, Deer Creek Reservoir, was placed into service. Nutrient contaminants, in particular phosphorous, in the watershed accumulate in the reservoirs causing algal blooms. By Terry Keep of TrojanUV, Said Abou Abdallah of Arcadis, and Dr. Dean Reynolds, Department of Water Treatment City of Alliance, Ohio

  • The Increasing Role That Filtration And UV Disinfection Plays In Cooling Towers
    The Increasing Role That Filtration And UV Disinfection Plays In Cooling Towers

    An increasing number of technology industries are turning to cooling towers to remove excess heat from buildings or processes. Server farms or server clusters are typically located between the system switches and the routers, and the removal of heat from these facilities is critical to their optimal function.

Small UV Plant Is Designed To Address Cultural And Safe Drinking Water Needs Cost-Effectively

BI Pure Water worked with University of British Columbia researchers and Lytton First Nation to develop a water disinfection system that addresses the needs of native communities, both cultural values as well as the basic necessity of clean drinking water.

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CONTAMINANT REMOVAL PRODUCTS

TOC Reduction

TOC Reduction

NeoTech Aqua Solutions provides the most efficient and cost-effective UV systems for destroying Total Organic Carbons (TOC’s) in water.  Whether your destroying NDMA, 1,4-dioxane, TCE, MTBE, urea, endocrine disruptors or other organics, only NeoTech Aqua provides ultraviolet TOC reduction with a treatment chamber optimized for low pressure mercury lamps.  As a result, NeoTech Aqua’s UV systems achieve a three times greater TOC reduction per kilowatt compared to standard UV systems, reducing our clients’ costs and energy consumption. In addition to efficiently generating ample 185 nm UV for TOC reduction, NeoTech Aqua’s TOC reduction systems also generate significant levels of 254 nm UV which serve as a powerful disinfectant, providing you both TOC-free and organism-free product water.

Oxiperm PRO Chlorine Dioxide Generation Systems

Oxiperm PRO Chlorine Dioxide Generation Systems

An ideal means of ensuring the cleanliness of drinking water is to use chlorine dioxide as a disinfectant. Chlorine dioxide is highly effective against all types of germs and has a long residual time in the system, meaning that it disinfects even without extracting water. The big advantage of chlorine dioxide over other disinfectants is its effectiveness against biofilms.

Disinfection Series

Disinfection Series

The NeoTech Aqua Disinfection Series is specially designed to disinfect water and is an essential component in advanced oxidation processes.

Emerging Pollutants:  The Role Of Activated Carbons

Emerging Pollutants: The Role Of Activated Carbons

The presence of active pharmaceutical ingredients, radio-opaque substances and endocrine disrupting chemicals in raw water sources is a relatively new emerging issue in relation to drinking water quality. However, the influence of pollutants on health and general well-being is becoming apparent with the incidence of carcinoma increasing and fertility rates being affected. A solution for the efficient removal of these substances from water use by production sites is required.

NeoTech D228™

NeoTech D228™

The NeoTech D228™ is specially designed to disinfect water and is an essential component in advanced oxidation processes.

GFH® Media for Arsenic Removal in Drinking Water

GFH® Media for Arsenic Removal in Drinking Water

GFH® Media from Evoqua Water Technologies is a specially designed adsorbent media capable of removing arsenic and other heavy metals from raw water supplies.

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DRINKING WATER CONTAMINANT REMOVAL PODCASTS

Biological Treatment Comes Of Age

Biological Treatment Comes Of Age

Biological treatment has been around quite a while at wastewater treatment plants, but it’s still undergoing evolution and innovation.

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.

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.

On-Site Generation: A Green Technology

On-Site Generation: A Green Technology

John Deogracias, a Commercial Leader with the Parkson Corporation, sat down with Water Online Radio at ACE15 to discuss the MaximOS product line, which uses a patented, award-winning technology of on-site generation.

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.

How Do You Build A Heavier Floc And Let It Sink And Settle Faster?

How Do You Build A Heavier Floc And Let It Sink And Settle Faster?

That’s a question that Jim Georger, regional sales manager with Kruger, a division of Veolia, discussed with Water Online Radio recently.

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CONTAMINANT REMOVAL VIDEOS

Open Channel Ultraviolet Disinfection From WEDECO

Open Channel Ultraviolet Disinfection From WEDECO

Water Online’s Bill King talks to Jay Jordan of WEDECO about the Duron UV system, which Jordan describes as an efficient, green solution that requires little maintenance. Suitable for secondary and tertiary wastewater applications, the Duron features a compact design, intelligent dose control, and overall efficiency benefits further described in the video.

Salsnes Delivers Fully Automated, Compact Filter Technology

Jorn Eliassen of Salsnes Filter, now part of TrojanUV, provides a detailed description of the company’s flagship product, which is presented as a low-cost option to a conventional primary clarifier. The system offers separation, thickening, and dewatering in one unit, features a small footprint, and is suitable for a variety of applications.

Replacing Chlorine Gas for Drinking Water Disinfection | Customer Testimonial

Replacing Chlorine Gas for Drinking Water Disinfection | Customer Testimonial

MIOX representative Mario Afanador from USA Global Market interviews engineer Carlos Rincon from the Wiesner Water Treatment Plant, where their large MIOX RIO Grande system is safely, cost-effectively disinfecting drinking water for the citizens of Bogota, Colombia.

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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).