CONTAMINANT REMOVAL RESOURCES

  • 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).

  • Jar testing is a common laboratory procedure used at water and wastewater treatment plants to determine optimum conditions for the coagulation / flocculation process. 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.

  • PFAS is increasingly an issue for drinking water utilities. While regulations are a moving target — with a push for testing that includes more compounds and lower detection limits — more utilities are deciding to treat their source water. As treatment evolves, so do the means and methods of disposing spent material, which changes the cost comparison for two key technologies.

  • Today, researchers can rapidly search for thousands of never-before studied chemical compounds in a wide variety of environmental, residential, and biological media. This approach is called “non-targeted analysis” (NTA). It differs from targeted analysis because researchers do not have to know what specific chemical they are looking for in a sample. They can use high-resolution mass spectrometry (HRMS) to rapidly identify many of the chemicals present in a sample. The HRMS measures the accurate mass of molecules and can find chemicals that would have gone unnoticed before. This approach is beneficial not just to researchers, but to States, tribes, and local communities who might want to know more about chemical exposure.

  • Following several years of piloting ion exchange resin for the removal of perfluorinated compounds, CKS Engineers needed to design and construct a full-scale system to treat the former military base stormwater runoff before entering Neshaminy Creek.

  • The City of Belleville, Ontario was planning on re-developing downtown waterfront property into a public space containing a park and a green space. Unfortunately, the proposed site had a long history as an industrial site – initially for a coal gasification plant from 1854 to 1947 and then as a bulk oil storage facility from 1930 to 1990.

  • Sigura™ calcium hypochlorite offers cooling tower operators and their service providers a highly effective biocide designed for controlling microorganisms to maintain system cleanliness, achieve associated production efficiency gains, and help guard against biofouling. Learn how a West Coast service provider's switch to Calcium Hypochlorite lead to a more consistent chlorine concentration and eliminated the need for frequent pump adjustments.

  • As per- and polyfluoroalkyl substances (PFAS) demand increasing attention due to health, environmental, and regulatory concerns, the pros and cons of available treatment options should be thoroughly evaluated.

  • Being forced to add carbon filtration in order to comply with drinking water and wastewater regulations or other extreme industrial filtration requirements is challenging enough. Worrying about performance limitations that the treatment process might impose only compounds the problem. Here is a look at how synthetic carbon technology makes it easier to design a better filtration medium tailored to the most challenging process demands.

  • The ozonation process for water purification is a powerful option for optimal disinfection and the reduction of micropollutants. Still, it may result in the formation of potentially toxic oxidation byproduct bromate in bromide-containing waters. This paper provides a high-level overview of the problem and highlights the main pathways of ozone decomposition and propositions to control bromates formation.

CONTAMINANT REMOVAL SOLUTIONS

  • PFOA/PFOS Treatment Systems

    PFOA/PFOS in Drinking Water

    PFOA (perfluorooctanic acid) and PFOS (perflurooctane sulfonate) are organic synthetic chemicals that have been used in manufacturing a multitude of industrial and consumer-based products including coatings, carpeting, and fire-fighting foams. Over several decades, they have contaminated the environment, specifically our drinking water sources, causing significant health concerns that recently prompted the EPA to take action.

  • Ultraviolet Disinfection ETS-UV™ Systems

    Ultraviolet (UV) irradiation is used for multifunctional purposes.  UV is most commonly used as an environmentally friendly alternative to chemical disinfection. It’s one of the most effective methods for inactivating harmful pathogens such as Listeria, E.coli, Giardia and chlorine tolerant pathogens like Cryptosporidium.  UV is also used for removal of organic and inorganic contaminants, including chlorine, ozone and Total Organic Carbon (TOC).  UV used in conjunction with an Advanced Oxidation Process (AOP) will remove Compounds of Emerging Concerns (CEC's), Synthetic Organics (SO's), Endocrine Disruptor Compounds (EDC's) and Personal and Pharmaceutical Care Products (PPCP's), as well as various taste and odor compounds from water.

  • Bardac® LF

    Bardac® LF 18-50 WT prevents algae growth at low concentrations and regains control of systems where algae have become established.

  • Zetasizer WT

    The Zetasizer WT is a fully automated online sensor for continuous zeta potential monitoring that enables the proactive, precise, and cost-efficient control of charge neutralization processes. By reducing coagulant and sludge disposal costs it delivers a healthy return on investment whilst reducing vulnerability to sharp changes in incoming water quality.

  • Capital Controls® Gas Feeder Series WM4000

    Capital Controls Series WM4000 gas feeders are wall cabinet mounted vacuum operated and designed to conveniently house a combination of gas feed equipment. The fibreglass cabinets enclose the gas flow control components.

CONTAMINANT REMOVAL VIDEOS

Ralph Franco, PE, Applications Engineering Manager North America for WEDECO -- A Xylem Brand discusses the treatment and future regulation of 1,4-dioxane at the Water Online Virtual Water Expo.