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.
A Telemetry Expert Describes How and Why Temporary Mobile I/O Will Transform Remote Asset Management
The Fountain Hills Sanitary District (FHSD) provides wastewater treatment for over 13,000 homes and businesses. In addition to supplying the town’s namesake fountain, its treated water irrigates local golf courses and parks. In 2000, the utility developed an innovative way to make up the short-fall during the dryer less populated summer. By Christopher Little
This paper describes a newly developed microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor instead of the traditional two elements and automatically manages changes in gas selection, gas temperature, gas pressure, and outside temperature. By John G. Olin, Ph.D., Founder/Chairman, Sierra Instruments
Devices ensure precision fertilizer application while reducing air and water quality issues.
There are many well documented flow meter technologies that are essentially trying to accomplish the same thing: measure fluid flow rate. Some of the technologies that are entrenched in the market, such as flow meters that utilize differential pressure as the measurement principle, are well understood by customers. Thermal mass flow meters however, such as the Magnetrol® Thermatel® TA2, are a rapidly growing technology that is continuously evolving.
In level measurement and specifically non-contacting level measurement, ultrasonic and radar technologies are popular across many industries. They both rely on the time of flight principle to determine the distance to the target or material from which the level can be determined.
A retreat and camp facility struggling with variable flow conditions and associated wastewater issues turns to a fixed-film treatment system designed just for that application. The results have far exceeded expectations: treatment quality surpasses permit levels and regular operation and maintenance requirements are at an all-time low.
When we humans look at objects we describe them in terms of color. We say that an apple is red or a leaf is green. To us color is an attribute just as surely as the mass or dimensions of an object. But the fact is that color is a pure human construct. Take away the human and it does not exist.
Considering the invaluable service provided to the society by the water companies, it is imperative to ensure their sustainability. To achieve this objective, these organizations must be allowed to fulfill their mission with effectiveness and efficiency. Information and communication technologies are especially important tools in this pursuit of enhanced performance.
The Metropolitan Sewer District of Greater Cincinnati’s Wastewater Collection Division manages 3,000 miles of main sewer line and services some 200,000 individual customer sewer laterals and accounts that cover nearly 1 million residents and businesses. When things go wrong with those pipes, the division hears about it from customers loud and clear.
Coriolis measurement has been adopted as a default technology in many application scenarios due to its high accuracy and immunity to process variables (temperature, pressure and flow profile). However, Coriolis wasn't always widely accepted. Two applications, in particular, helped what was once a nascent flow measurement technology gain a foothold in the marketplace.
Fox Thermal Flow Meters use a constant temperature differential (constant Δ T) technology to measure mass flow rate of air and gases.
Dosing of the precipitant was adjusted manually based on the laboratory measurement value of the daily composite sample and so was unable to respond to possible peaks. Although being compliant with the effluent limits, the values observed fluctuate between 0.2 and 0.8 mg/L.
Hach LDO® technology improves the efficiency of pharmaceutical plant’s wastewater treatment process, helping to protect the environment and the community.
Levels of phosphorus, a chemical element that promotes organic growth, must be controlled in wastewater coming from beverage, food and dairy processing plants. Failure to control phosphorus accurately has a negative impact on water quality and can lead to large fines.
Compliance and consistent high quality are two of the key goals within the beverage industry. Hach® provides support for these goals through comprehensive analyses of water and beer.
There are several basic methods for reducing harmonic voltage and current distortion from nonlinear distribution loads such as adjustable frequency drives (AFDs). Following is a description of each method, along with each method’s advantages and disadvantages.
Organic carbon compounds vary greatly. In fact, one of the first lessons in most introductory Organic Chemistry courses explains that the number of possible carbon compounds is virtually infinite due to carbon’s ability to form long, chain-like molecules. While chromatographic methods like gas chromatography (GC) or high-performance liquid chromatography (HPLC) are able to make quantitative determinations for specific compounds, the user must first know which specific compounds to look for.
In the early days of variable frequency drive (VFD) technology, the typical application was in process control for manufacturing synthetic fiber, steel bars, and aluminum foil.
The C445 motor management relay offers the most configurable protection options in the industry, with features specifically designed to protect critical pumps from costly damages due to dead-head and other underloaded or starved pump conditions.
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.
Understanding your detection needs when it comes to free cyanide can help you choose the most suitable detection method.
For the second straight year, the Water Environment Federation Exhibition and Conference (WEFTEC) came to McCormick Place in Chicago, returning also to the city which launched WEFTEC 90 years ago. As always, it was a showcase of the latest technologies and ideas available in the water/wastewater industry, but each show also has its own "feel" that reflects the times.
Rapid industrialization and tightened water quality standards are leading to an increase in global spending on water quality monitoring instrumentation. Spending in this area is projected to grow from $2.5 billion in 2014 to $3.6 billion by 2020, with some 25 percent spent on new, less expensive water quality monitoring sensors that deliver on-the-spot measurements.
High up in the Tehachapi Mountains of California’s Central Valley lies the largest consumer of the state’s electricity, driving 14 centrifugal pumps, each rated at 80,000 hp.