The latest webinar in the Environmental Protection Agency (EPA) Small Drinking Water Systems Webinar Series will be focused on disinfection byproducts control. EPA’s Office of Research and Development and Office of Water host this monthly webinar series to discuss challenges and treatment solutions for small drinking water systems and communicate current small drinking water systems research along with Agency priorities.
Presentation 1—Web-Based Applications to Simulate Disinfectant Water Chemistry: Development and Practical Uses.
Presented by David Wahman, EPA's Office of Research and Development, Center for Environmental Solutions and Emergency Response
Web-based applications (WBAs) are developed to provide kinetic simulations of inorganic chloramine chemistry as well as the equilibrium chemistry between free chlorine, cyanuric acid, and chlorinated cyanurates. The WBAs serve as learning tools for drinking water operators, engineers, researchers, and students by providing an interactive environment to explore and understand these water chemistry scenarios. This presentation will discuss WBA development and their practical application.
Presentation 2—Practical Approaches to Assess Distribution System Influent Water Quality: Implications for Residual Maintenance and Disinfection Byproduct Formation.
Presented by Matthew Alexander, EPA's Office of Water, Office of Groundwater and Drinking Water
Whether water is coming directly from a drinking water treatment plant or through a metered connection to a consecutive system, water utilities can assess the stability of disinfectant residual and corresponding potential for disinfection byproduct formation. A distribution system influent hold study is a straightforward and cost-effective way to evaluate changes in bulk water quality over time. Combined with a WBA to simulate inorganic chloramine chemistry, a hold study may also be used to assess chloramine demand. This presentation will introduce the hold study procedure, including use of a WBA to assess chloramine demand, and various case studies.