Perhaps the most common question that we’re asked is how our ATP tests correlate with traditional microbiological methods. Unsurprisingly, when people are used to getting their information in a certain way, they naturally want to know how a new method will stack up against it. However, the mechanisms of culture-based techniques and ATP analyses are completely different, and in many ways, so are the results they produce.
With the United States Environmental Protection Agency (USEPA) now requiring arsenic levels of 10 ppb for drinking water, reducing high levels of arsenic in one of its community’s water supply had been a challenge for Eureka County. Find out how a community, who once searched for silver, hunted down a way to remove high levels of arsenic from its drinking water.
In recent years, the debate about which technology is best suited for level monitoring and open channel monitoring (OCM) applications has taken some traction. There are those who argue that ultrasonic level technology has been uncontested as the standard for level and OCM applications in the water industry. The counter-argument is that radar technology is more effective because it is more robust and accurate than ultrasonic technology.
Cibola is a small community located in Southern Arizona along the Colorado River. With a growing population, the community decided to install a centralized water system to replace individual wells.
A municipal water quality manager reports replacement of sodium hypochlorite (hypo) vacuum feeder units with a more advanced type at one water treatment plant (WTP) has helped allow for continued reliability for chlorination.
The city of Fort Lupton a growing Front Range community located along the South Platte River in Colorado, began operation of a new 5 MGD (18.93 MLD) membrane filtration system in 1997.
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.
A membrane degassing system can solve high bicarbonate alkalinity that negatively affects anion bed life.
Drinking water utilities have a lot on their plates. Aside from the inherent technical difficulty of providing a vital service, they have to maintain positive customer relations, contend with increasingly strained budgets, and run operations with as little stress to employees as possible.
Monitoring chlorine and fluoride levels in the drinking water of Utah’s Taylorsville-Bennion Improvement District used to be expensive, labor intensive, and often sensitive to interference from the variable frequency drives used to operate the chlorine injection pumps. That is, until the district upgraded to Rosemount free chlorine and fluoride sensors and analyzers from Emerson.
Gas control is an important concern in the beverage industry. Oxygen in the water can oxidize flavor components and shorten the shelf life of the product. Carbon dioxide can also have an impact on taste and pH of the product.
Facility administrators will find the advanced ST100 Series Thermal Mass Air/Gas Flow Meter from Fluid Components International (FCI) helps them improve the accuracy of specialty gas point of use and sub-metering operations to achieve accurate billing in their labs for better cost tracking and control.
Turbidity, or the relative clarity of a liquid (in this case drinking water), is caused by the presence of microscopic particles such as clay, silt, or other fine undissolved matter
Radar technology is often viewed as the “best” method of level measurement, but this isn’t necessarily true in the water industry.
Ensuring safe drinking water doesn’t end when the water leaves the water treatment plant. Protecting the safety and security of drinking water from accidental or intentional contamination within the distribution system is becoming increasingly important.
Total organic carbon (TOC) testing is the traditional method for determining organic matter in water. However there is a far more practical, affordable and often more useful way to measure organic matter. UV absorbance testing (UVA) is rapidly becoming the preferred method of measuring organics even when the levels of organics being measured are very small.
Pureflow, Inc. is a Southeastern-based expert in designing complete water treatment systems as well as providing value-added solutions for fixing operational issues in existing systems. Pureflow teamed up with Membrana to help solve an operational issue at one of their customer’s facilities. By Membrana
"The variable concentration of solids when purging lamella clarifiers creates problems with sludge dewatering. These problems are exacerbated when changing the flocculant. Read the full application note to learn how automatic control of purge cycles for clarifiers using the Sonatax sludge level probe resulted in reduced energy consumption and maintenance at the plant."
Staying on top of new regulations is a never-ending responsibility for water professionals. Each new rule may require huge dollars in capital and operating costs. Operators and technicians may need training on new technologies, sampling, and testing methods.
New analysis has found that perfluorinated compounds could be more than 20 times as prevalent in drinking water as previously thought. Will this revelation spur new regulatory action? And if so, what should that look like?
The legislative body responsible for ensuring that the federal government remains accountable has recently issued a report on the nation’s lead contamination problem. Its recommendations may be what finally save the country’s drinking water.
The question of how to get the most out of the data that we collect as an industry was central to the Sensing in Water Conference recently hosted by the Sensors for Water Interest Group (SWIG). The two-day conference highlighted several themes on how to get the best of the data that the Water Industry collects and how to make our measurements “meaningful.” Chief among those themes was greater collaboration among the different stakeholders, including water companies, universities, and the supply chain.
Though the field of water loss management is ever-growing and refining, a validated water audit to disaggregate volumes and values of all loss components remains the essential first step to reduce water loss in a way that is economically sustainable, both for your utility and your ratepayers. With extreme weather events, conservation rate structures, and regional population shifts changing the face of business as usual, it’s time to get with the program.
New water brings new challenges, such as overcoming heightened regulatory standards and consumer wariness. To ensure water quality and quell concerns, utilities moving toward alternative water sources might also consider updating their monitoring technology.
Drinking Water Treatment involves the removal of pathogens and other contaminants from source water in order to make it safe for humans to consume. Treatment of public drinking water is mandated by the Environmental Protection Agency (EPA) in the U.S. Common examples of contaminants that need to be treated and removed from water before it is considered potable are microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals and radionuclides.
There are a variety of technologies and processes that can be used to decontaminate or treat water in a drinking water treatment plant before the clean water is pumped into the water distribution system for consumption.
The first stage in treating drinking water is often called pretreatment and involves screens to remove large debris and objects from the water supply. Aeration can also be used in the pretreatment phase. By mixing air and water, unwanted gases and minerals are removed and the water improves in color, taste and odor.
The second stage in the drinking water treatment process involves coagulation and flocculation. A coagulating agent is added to the water which causes suspended particles to stick together into clumps of material called floc. In sedimentation basins, the heavier floc separates from the water supply and sinks to form sludge, allowing the less turbid water to continue through the process.
During the filtration stage, smaller particles not removed by flocculation are removed from the treated water by running the water through a series of filters. Filter media can include sand, granulated carbon or manufactured membranes. Filtration using reverse osmosis membranes is a critical component of removing salt particles where desalination is being used to treat brackish water or seawater into drinking water.
Following filtration, the water is disinfected to kill or disable any microbes or viruses that could make the consumer sick. The most traditional disinfection method for treating drinking water uses chlorine or chloramines. However, new drinking water disinfection methods are constantly coming to market. Two disinfection methods that have been gaining traction use ozone and ultra-violet (UV) light to disinfect the water supply.