In Canada and the western United States, long treated water transmission lines are frequently utilized to convey potable water to rural communities. These long transmission lines combined with chlorine for water disinfection can often create the requisite conditions for the formation of undesirable disinfection-byproducts (DBPs). One of the most common DBPs is a family of volatile compounds called Trihalomethanes (THMs) which are regulated in Canada to a level of 100 ppb (part-per-billion) annual average and in the US to a level of 80 ppb.
In late 2005, the City of Newberg, Oregon, decided to upgrade their water treatment plant disinfection process from gas chlorine to on-site hypochlorite generation (OSHG) in an effort to simplify operations and increase operator safety. The plant produced an average of 2.5 million gallons per day (MGD), with a peak capacity of 5 MGD.
According to a recent survey by the Water Quality Association, 30 percent of residential water utility customers are concerned about the quality of the water coming out of their taps, which is likely one reason that American consumers spent upwards of $16 billion on bottled water last year. It’s also why the water purifier market continues to experience extreme growth and is expected to garner $45.3 billion by 2022 as companies in the space look to better cater to consumer demand.
Located in northern California, the Coastside County Water District (CCWD) provides treated water to the scenic town of Half Moon Bay and several unincorporated communities in the area. The system is served by two treatment plants, the Nunes Water Treatment Plant (4.5 MGD) and Denniston Creek Water Treatment Plant (1.0 MGD) and water is distributed through about 100 miles of transmission and distribution pipe.
Upper Deerfield Township, NJ relies on groundwater from four wells measuring 120 to 160 feet deep. The water is treated at two treatment plants with a capacity of 2.2 MGD and then pumped out to the distribution system with approximately 750,000 gallons of storage. Since the deep groundwater is hard, operators add lime to the finished water to raise the pH to reduce hardness.
In 2005, in response to changes to the Canadian Drinking Water Quality guidelines, the Greater Vancouver Water District Board approved a proposal to upgrade the Coquitlam WTP with UV disinfection technology to act as the primary means of disinfection.
The public works director responsible for a southwestern U.S. city’s drinking water supply reports multiple benefits from replacement of a problematic peristaltic pump system with a special liquid vacuum feeder system for bleach, liquid ammonium sulfate (LAS), and polyphosphate feeds at one of its well sites.
In 2012 Long Beach Island, New Jersey, was pummeled by the catastrophic storm surge of Hurricane Sandy. Three of the town's four water plants were badly damaged. Plans were made to rebuild the facilities to higher standards to withstand potential storm impacts.
A veteran potable water production and treatment superintendent, currently overseeing potable water needs for a federal reservation, reports significant benefit from the availability of secondary containment equipment for chlorine gas storage, as part of a management strategy to help enable the use of that chlorination method.
The City of Paramount conducted a pilot study for arsenic, manganese and iron treatment system at their Well 15 site. The onsite pilot test was designed to demonstrate the performance of the Loprest Water Treatment Company treatment process proposed for the new treatment plant.
The U.S. EPA's promulgation of the Stage 2 Disinfection By-Products Rule required the Public Works Department of Danvers, MA, to establish a Two-Phase upgrade of the plant’s treatment process in order to comply.
With its mountain beauty and deep, clear waters, Lake Tahoe is one of the most popular vacation spots in the California/Nevada area.
Bathurst is the home of the Bathurst 1000 Race, the largest NASCAR-style “touring car” race in Australia. On race day, tens of thousands of additional visitors tax the capacity of the Bathurst 5 million-gallon-per- day wastewater treatment plant. The diligence and capability of the treatment staff allows the plant to meet the challenge every year.
Chemical disinfection using strong oxidants involves the transportation, storage, and handling of unstable and/or aggressive and hazardous chemicals. The production of oxidants at the location where they are to be used has therefore been a preferred option, especially in small-scale or remote installations. On-site electrolysis of NaCl for the local production of chlorine or hypochlorite, or the production of ozone-enriched oxygen by silent discharge has been standard for years. However, it is possible to take the idea of producing chemical disinfectants locally a step further and look at in situ techniques, i.e. at devices, which produce oxidants in and from the water to be treated. By Dr. Samuel Stucki, Scientific Consultant to Innovatec Gerätetechnik GmbH,Germany
The NeoTech D428™ is specially designed to disinfect water and is an essential component in advanced oxidation processes.
Pipeline Flash Reactors™ (PFRs or spool pieces) utilize high velocity mixing to transfer ozone or oxygen-enriched sidestreams into bulk water flow, all within a compact footprint. With a PFR, ozone or oxygen mass transfer occurs in the pipeline within seconds, eliminating the need for additional tanks or basins. Whether it is providing ozone for water purification or increased dissolved oxygen for wastewater, Mazzei’s PFR uniformly distributes gas into the water and minimizes the size and cost of gas contacting.
Total chlorine measurement is essential in the control of chlorine in water before its return to the environment in a wide range of industrial applications including desalination. It also provides accurate reporting to the EPA about that control. To meet EPA requirements, the instrument must be reliable for long periods of time and monitor down to 500 ppb. The Rosemount Total Chlorine Measurement system from Emerson meets and exceeds all requirements while saving money through the use of low-cost reagents.
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.
When it comes to gas injection, it pays to work with an experienced manufacturer that has lived the ups and downs of moving from pilots to full-scale plants. A number of years ago, Mazzei Injector Company ran into an issue where the engineer had specified a system at 2 psi of water pressure.
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.
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?
Steve Day, Marketing and Product Management Director with Calgon Carbon UV Technologies sat down with Water Online Radio to talk about his company, and UV technology.
Advanced treatment solutions continue to evolve as 1,4-Dioxin, N-Nitrosodimethylamine (NDMA) removal and Pharmaceuticals and Personal Care Products (PPCPs) appear on the regulatory horizon. Many times, advanced treatment requires combinations of different products in the treatment process.
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.”
This video features a step-by-step demonstration of how to change out a used UV lamp and install a new one.
With the TrojanUVSigna™, the channel water level is managed using light locks in combination with the downstream water level controller. Light locks eliminate the need for complex channel designs.
Pinnacle Ozone Solutions was founded with the goal of simplifying the ozone process. Our products and systems specifically designed to be modular, reliable, and both energy and cost efficient. Our truly unique approach allows each system to be precisely matched to your individual needs using truly independent QuadBlock™ ozone generator cells. This approach also allows for easy expansion, reduces the need for costly redundant or standby equipment, and can be fully upgraded at any time. Watch this informative video about how Pinnacle’s radically simple approach to ozone projects.
Calgon Carbon Corporation (NYSE:CCC), and its European operation Chemviron Carbon, is a global manufacturer and supplier of granular activated carbon, innovative treatment systems, value added technologies and services for optimizing production processes and safely purifying the environment
JCS Industries, Inc. was founded in 2002 as a product development company charged with developing an alternative to the current vacuum feed liquid doser technology for a worldwide manufacturer of water and waste treatment equipment. After one year of design and two years of beta testing, JCS developed the Model 4100 Automatic Vacuum Liquid Feeder.
3M Liqui-Cel Membrane Contactors are used for degassing liquids. They are most commonly used for O2 removal from water and CO2 removal from water, but they are also capable of controlling a variety of other dissolved gasses as well, such as Nitrogen.
De Nora, a global leader in electrochemical technologies and the world’s largest provider of electrodes, coatings and complete solutions for electrochemical processes, has acquired the MIOX business from Johnson Matthey.
Pinnacle Ozone is the manufacturer and world class integrator of rugged & compact, energy efficient industrial ozone systems. Our Pinnacle systems are used in a diverse array of industrial, commercial and municipal water application areas where treatment requires compact size, system mobility, high efficiency, wide operational pressure, and complex system integration solutions and services.
De Nora Water Technologies is a leading supplier of water and wastewater treatment solutions. We provide our clients with some of the industry’s brightest minds, advanced technologies, and quality products to provide you with truly efficient, cost-effective solutions to your water and wastewater challenges
Trojan Technologies specializes in the design, manufacture and sale of pressurized and open-channel ultraviolet (UV) disinfection systems for municipal wastewater, municipal drinking water and environmental contaminant treatment applications. We are proud to have the largest installed base of UV systems in the world and are committed to reducing water stress and maximizing this invaluable resource for current and future generations.
Using processes that are both future-oriented and ecologically harmless, WEDECO products are committed to improving the foundations on which we live, on a global scale. As a company committed to healthcare, we consider it our duty to create health provisions, especially in the area of water disinfection. The broad outline of our business is to realize the best possible solution for mankind and the environment, and the most economic solution for our clients.
UV Pure® Technologies develops and manufactures technically advanced UV water purification systems. Since 1998, over 12,000 UV Pure systems have been installed in residential, commercial, industrial, public and municipal applications treating wastewater, reuse water, rainwater, and drinking water. The company’s Crossfire Technology is dramatically advantaged compared to conventional ultraviolet systems. UV Pure Systems are self-cleaning, and smart - with multiple sensors and on-board diagnostics. They are engineered to be fail-safe and virtually maintenance-free. Lamps are mounted in air surrounded by elliptical reflectors providing more effective deactivation of pathogens, incorporating easy lamp changes and visual quartz inspection. Remote monitoring is available.
WATER DISINFECTION
Water disinfection is the process of removing unwanted chemicals, biological contaminants, suspended solids and gases from contaminated water. It is also the elimination, deactivation or killing of pathogenic microorganisms.
Methods used include physical processes such as filtration, sedimentation, and distillation, biological processes such as slow sand filters or activated sludge, chemical processes such as flocculation and chlorination and the use of electromagnetic radiation such as ultraviolet light.
Ozonators produce small quantities of ozone which is a strong oxidizing agent that kills pathogens over a short period of time.
