Water Storage Tank Mixing Systems and Best Practices for Water Quality Optimization
Free Webinar Presentation from NRWA and Water University
$20 to earn CEU/CEC credit (learn more)
Click Here to Register

Water storage tanks have historically been designed with hydraulic considerations, but not with consideration to preserving water quality. As a result, many water storage tanks suffer from water quality degradation (stratification, loss of residual, DBP spikes, and nitrification) due to short-circuiting and incomplete mixing caused by poor inlet/outlet pipe configurations. This presentation discusses the science of mixing water storage tanks. Computer (CFD) and physical scale modeling results are utilized to illustrate the impacts of tank style, inlet/outlet pipe configurations, water temperature, and volume turnover on mixing and water quality. Both passive and active mixing systems will be presented with pros and cons of each. Additional topics will include methods to sample/monitor storage tank water quality, and how to calculate water age and methods used to minimize water age that will result in optimization of distribution system water quality.

Mike Duer, P.E.  - Michael Duer has a Bachelor of Science Degree in Mechanical Engineering and is a registered Professional Engineer in the Commonwealth of Pennsylvania. He joined Tideflex Technologies in 1994 and is currently the Chief Engineer specializing in the Tideflex® Check Valve product line. He has been involved in Design and Applications Engineering specializing in control and check valves for the water and wastewater industries. He utilizes Computational Fluid Dynamics (CFD) modeling to analyze mixing in finished water storage facilities.