Contaminant Removal Resources
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A Better Approach To Iron And Manganese Removal
9/13/2021
The aesthetic impact of iron and manganese on finished water — altering its color, odor, and/or taste — is the top driver of municipal utility customer complaints.
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Big Ideas For Small Water Agencies Facing Chemical Contaminants In Drinking Water
9/7/2021
Who should pay, literally and figuratively, for chemical contamination of source water?
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Calculating ROI When Adding Zeta Potential To A Water Treatment Facility
9/1/2021
Zeta potential (Zp) provides unbiased guidance on the correct dosage of flocculent chemicals by measuring the charge of the particles that need to be filtered. This measurement not only can replace time consuming and subjective jar testing, but can provide actionable data that can save significant chemical cost and extend filter run times.
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Battling Biofilm
8/2/2021
Biofilms are extremely complex ecosystems that provide excellent protection for the microorganisms within. This often makes them difficult to kill, even with chlorine. Basic understanding of biofilm ecosystems and their behavior to chlorine and other oxidizing biocides can offer valuable insight into achieving better microbial control.
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Shining A Light On Global Water Stress
8/2/2021
The word “unprecedented” is overused and often abused. Water stress, however — the situation in which the water resources in a region or country are insufficient for its needs — is today a major threat and we are in fact facing “unprecedented” challenges. Climate change is a big factor contributing to it, but it’s not the only factor. Without rapid changes in industrial water usage, it is predicted that within 10 years there will be a 40 percent global water deficit.
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Capitalizing On Evolving PFAS-Removal Options
8/2/2021
Granular activated carbon (GAC) and ion exchange (IX) resin have long histories in removing a variety of per- and polyfluoroalkyl substances (PFAS), known as ‘forever chemicals.’ Here are some performance considerations of evolving options that can pay dividends for first-time and experienced PFAS removal operators alike.
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Implementing Granular Activated Carbon Systems: Important Design And Start-Up Considerations
7/6/2021
As granular activated carbon (GAC) is increasingly employed to treat PFAS, new practitioners can improve their results by knowing what to expect — thanks to data and experience acquired from prior installations.
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The Payoff From Improved Chemical Dilution
7/1/2021
Chemical dilution systems play a critical role in many municipal and industrial water treatment systems. However, older technology tends to be less reliable and accurate while being a drain on resources, whereas a more advanced solution can significantly improve performance and generate labor savings.
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New Toolkit Arrives Just In Time For HAB Season
6/10/2021
With harmful algal blooms (HABs) being forecast to increase, in part due to the effects of climate change, more water systems can expect to face problematic cyanotoxin conditions more frequently and for more days per year. In its efforts to mitigate the negative effects of such increases, the U.S. EPA has enhanced its information resources for water utilities by issuing a new Cyanotoxins Preparedness and Response Toolkit (CPRT).
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Jar Testing Gets An Upgrade
6/7/2021
Jar testing is a common laboratory procedure used at water and wastewater treatment plants. In a set of beakers a defined amount of water is mixed with varying amounts of coagulant, and through observation by a trained operator the optimal amount of coagulant can be determined.