For a pH sensor to maintain an accurate reading, the sensor must remain clean. Specifically, the glass measuring electrode cannot become coated, and the reference electrode assembly must not become coated, plugged or otherwise contaminated by the process solution. Here’s how to clean pH sensors to ensure correct operation.
For decades, a Winnipeg utility used a multiple point-chlorination process to treat raw water drawn from remote Shoal Lake. Concerns eventually arose about the potential presence of chlorine-resistant pathogens–Crytosporidium and Giardia–and residual disinfection byproducts, which coincided with encroaching development near the lake. The Clari-DAF system was selected and now removes 70 percent of the organics at the Winnipeg plant, which also improves filtration and extends the intervals between filter backwashes.
The Jimo, China, municipal wastewater plant was originally designed to treat a combination of municipal and textile wastewater (120,000 m3/d) with Class IB effluent limits for BOD, COD, ESS, TN, NH3-N and TP.
A landfill operator’s leachate treatment plant in Missouri required pH reduction following lime-softening and prior to the biological wastewater treatment process. Carbon dioxide (CO2) was chosen as a substitute for sulfuric acid due to improved process control and a reduced tendency to form scale.
To increase capacity within the existing footprint of a wastewater treatment facility in Michigan, two existing tanks were converted to aeration tanks with pure-oxygen aeration provided by Praxair’s In-Situ Oxygenation (I-SOTM) System.
The EPA’s guidance documentation “3T’s for Reducing Lead in Drinking Water in Schools and Child Care Facilities: Training, Testing, Telling” recommends for schools to routinely test their facility’s drinking water, with a focus on lead levels in drinking water fountains.
The City of Wilmington, Delaware is situated where the Christina River and the Brandywine Creek flow into the Delaware River.
Starting in 2010, the drinking water plant in Wellsboro, PA, began experiencing high turbidity and algae in the water which caused emergency notices for citizens to boil their water before use.
A dissolved oxygen sensor ought to be simple to understand. Whether it is membrane or optically based, it gives a signal that is proportional to the concentration of oxygen concentration in water.
The City of Gordon Texas’s drinking water facility was struck by lightning. Thinking long term, and desiring the latest technology available, the City took this opportunity to upgrade their on-line instrumentation with a range of new continuous monitoring on-line instruments including chlorine analyzers, pH monitoring, temperature monitoring, and turbidity monitoring.
Russellville water treatment plant is a surface water plant using traditional clarification, filtration, and treatment. The plant historically has used traditional contact turbidimeters that employ tungsten lamps that required quarterly maintenance, but replaced their turbidimeters with Swan Turbiwell turbidimeters in 2012. Read the full report for a comparison of the performance of the Swan Turbiwell to the previously installed turbidimeters.
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.
Reliant Water Technologies is a global marketing company that supplies high quality, one-of-a-kind products to the water and wastewater treatment industries.
For more than 60 years, Hach has been at the crest of the industry - finding solutions that help you best manage your water. Our analytical instruments and reagents are used to test the quality of water in a variety of industries and markets - from around the corner, to around the globe.
Rosemount Analytical, one of Emerson’s leading process management companies, is the world’s premier supplier of technologies for liquid and combustion analysis, process analysis, gas measurement, and emissions monitoring. With an 80-year legacy of manufacturing liquid and gas analytical products that have revolutionized the process industries, we continue to provide real, quantifiable analytical solutions.
The Myron L Company, originally founded in 1957 as a Research and Development company, is a privately owned and operated California Corporation
OI Analytical designs, manufactures, and supports analytical instrumentation used for sample preparation, detection, and measurement of chemical compounds and elements. Our products are supported by an ever-increasing network of sales, service, and applications personnel. The Company's products are sold worldwide by direct sales personnel, independent representatives, and distributors
Real Tech Inc. Is dedicated to providing high quality UV photometric and spectroscopic analytical instrumentation for the water and wastewater industry.
Swan Analytical Instruments is a leading manufacturer of high quality on-line analytical instruments for water analysis in applications such as high purity water, steam, condensate, cooling water, potable water, and effluent.
Thermo Fisher Scientific offers a full range of water analysis instruments from pH, ISE, conductivity and dissolved oxygen meters, electrodes and solutions, to colorimetry, titration and on-line process monitors.
YSI offers a full line of environmental monitoring and sampling instruments, systems, and services for water quality and water velocity data. Our multiparameter instruments, aquaculture monitoring systems, handheld sampling instruments, and complete line of SonTek products can be incorporated into any of your monitoring or sampling applications.